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• What's the best NAME for "quick" Category you add to a file?

  - by Joe Blow

  So the other day I was sick of typing out repetetive addTarget:action:forControlEvents:s, and macros are only entertaining for so long, so I did this: @implementation UIControl (xx) -(void)addTarget:(id)target action:(SEL)action { [self addTarget:target action:action forControlEvents:UIControlEventTouchUpInside]; } @end *and simply added it at the top of the .m file in question. Works great of course, but notice the "xx".* What's the best thing to NAME a "quick" Category like this? Annoyingly, it appears you can not leave the xx blank - it would then become an "Extension" (which, incidentally, I don't understand at all). I was thinking maybe: a single underscore the name of the class again identically "quick" perhaps the name of the class in this file (as in "quick extra routines for UIControl in CherryBomb") - so it would be UIControl(CherryBomb), ie, remind you that these extra routines are handy for CherryBomb "x" your or your company's initials (use the same "quick" Category name everywhere) "ThisTextNeverUsedAnywhere" By the way, I've been assuming that Categories only happen in the files that see them (CherryBomb.m in the example) - they do not from then on apply app-wide. ie they only apply where you include the header file (UIControl+NattyStuff) or in the "quick" case only in the file to which one adds the text. (By the way ... it appears you do not actually need to include an interface for such a Category, i.e. you can omit... //you can actually get away without these lines... //#import <UIKit/UIControl.h> //@interface UIControl (x) //-(void)addTarget:(id)target action:(SEL)action; //@end ... that part and it works fine.) For people who love Categories, and who doesn't, what's the answer to this troubling question? What should you name a "quick" Category where the name is never going to be referenced again and is irrelevant? Is "_" a solution?

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• Performing selectors on main thread with NSInvocation

  - by kpower

  I want to perform animation on main thread (cause UIKit objects are not thread-safe), but prepare it in some separate thread. I have (baAnimation - is CABasicAnimation allocated & inited before): SEL animationSelector = @selector(addAnimation:forKey:); NSString *keyString = @"someViewAnimation"; NSInvocation *inv = [NSInvocation invocationWithMethodSignature:[workView.layer methodSignatureForSelector:animationSelector]]; [inv setTarget:workView.layer]; [inv setSelector:animationSelector]; [inv setArgument:baAnimation atIndex:2]; [inv setArgument:keyString atIndex:3]; [inv performSelectorOnMainThread:@selector(invoke) withObject:nil waitUntilDone:NO]; I get: *** +[NSCFString length]: unrecognized selector sent to class 0x1fb36a0 Calls: > #0 0x020984e6 in objc_exception_throw > #1 0x01f7e8fb in +[NSObject doesNotRecognizeSelector:] > #2 0x01f15676 in ___forwarding___ > #3 0x01ef16c2 in __forwarding_prep_0___ > #4 0x01bb3c21 in -[CALayer addAnimation:forKey:] > #5 0x01ef172d in __invoking___ > #6 0x01ef1618 in -[NSInvocation invoke] But [workView.layer addAnimation:baAnimation forKey:@"someViewAnimation"]; works fine. What am I doing wrong?

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• Can't unwrap Optional.None tableviewcell

  - by Mathew Padley

  I've a table view that has a custom table view cell in it. My problem is that when i try and assign a value to a variable in the custom table view cell I get the stated error. Now, I think its because the said variable is not initialised, but its got me completely stumped. This is the custom table cell: import Foundation import UIKit class LocationGeographyTableViewCell: UITableViewCell { //@IBOutlet var Map : MKMapView; @IBOutlet var AddressLine1 : UILabel; @IBOutlet var AddressLine2 : UILabel; @IBOutlet var County : UILabel; @IBOutlet var Postcode : UILabel; @IBOutlet var Telephone : UILabel; var location = VisitedLocation(); func Build(location:VisitedLocation) -> Void { self.location = location; AddressLine1.text = "test"; } } My cell for row at index path is: override func tableView(tableView: UITableView!, cellForRowAtIndexPath indexPath: NSIndexPath!) -> UITableViewCell! { var addressCell = tableView.dequeueReusableCellWithIdentifier("ContactDetail") as? LocationGeographyTableViewCell; if !addressCell { addressCell = LocationGeographyTableViewCell(style: UITableViewCellStyle.Value1, reuseIdentifier: "ContactDetail"); } addressCell!.Build(Location); return addressCell; } As I say I'm completely baffled, the Build function calls the correct function in the tableviewcell. Any help will be gratefully appreciated. Ta

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• Adding custom UITableViewCell crashes the simulator.

  - by nevva

  Im trying to build my application using a custom UITableViewCell. This is the code in my UIViewController that adds the viewCell to the table: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { NSLog(@"------- Tableview --------"); static NSString *MyIdentifier = @"MyIdentifier"; MyIdentifier = @"aCellIdentifier"; MyTableCell *cell = (MyTableCell *)[tableView dequeueReusableCellWithIdentifier:MyIdentifier]; if(cell == nil) { NSArray *[[NSBundle mainBundle] loadNibNamed:@"tblCellView" owner:self options:nil]; cell = tblCell; } [cell setLabelText:[NSString stringWithFormat:@"indexpath.row: %d", indexPath.row]]; //cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:MyIdentifier] autorelease]; return cell; } if i uncomment the line above "return cell" it returns a regular UITableViewCell without any errors, but as soon as i try to implement my custom cell it crashes with this error: ------- Tableview -------- 2010-04-23 11:17:33.163 SogetGolf[26935:40b] * Assertion failure in -[UITableView _createPreparedCellForGlobalRow:withIndexPath:], /SourceCache/UIKit_Sim/UIKit-984.38/UITableView.m:4709 2010-04-23 11:17:33.164 SogetGolf[26935:40b] * Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'UITableView dataSource must return a cell from tableView:cellForRowAtIndexPath:' 2010-04-23 11:17:33.165 SogetGolf[26935:40b] Stack: ( ... I have configured the .xib file as one should with the proper outlets. And the identifier of the UITableViewCell corresponds with name im trying to load from NSBundle

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• Mysterious Flickering Visual Artifact

  - by Axis

  A flashing bar of red appears at the top of the EAGLView that I have added as a subview in my iPhone app. It flickers on and off (i.e., one frame it's there, the next frame it's not, the next frame it's there again). I have removed a lot of code from my app until I'm essentially left with the stock OpenGL-ES project and a few changes: The glview is not fullscreen; it's a subview. I enabled the depth buffer. I'm not even trying to draw anything. If the glview is fullscreen, or if I disable the depth buffer, then there is no flicker and it works fine. But needless to say, this is a 3D view and I'd like to be able to display it within a larger UIKit view. I'm not sure what code would be useful to post, but here's how I add the glview to my main view: appDelegate.glView.frame = CGRectMake(245, 65, 215, 215); [self.view addSubview:appDelegate.glView]; [appDelegate.glView startAnimation]; Here's my render function: - (void) render { [EAGLContext setCurrentContext:context]; glBindFramebufferOES(GL_FRAMEBUFFER_OES, defaultFramebuffer); glViewport(0, 0, backingWidth, backingHeight); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glBindRenderbufferOES(GL_RENDERBUFFER_OES, colorRenderbuffer); [context presentRenderbuffer:GL_RENDERBUFFER_OES]; } It seems pretty obvious to me that the problem lies with the depth buffer somehow, but I'm not sure why. Also, it works fine in the simulator, but not on my iphone. I'm using iPhone OS 3.1. Any ideas on where to look for a problem?

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• help me to parse JSON value using JSONTouch

  - by EquinoX

  I have the following json: http://www.adityaherlambang.me/webservice.php?user=2&num=10&format=json I would like to get all the name in this data by the following code, but it gives an error. How can I fix it? NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding]; NSDictionary *results = [responseString JSONValue]; NSDictionary *users = [results objectForKey:@"users"] objectForKey:@"user"]; for (NSDictionary *user in users){ //NSLog(@"key:%@, value:%@", user, [user objectForKey:user]); NSString *title = [users objectForKey:@"NAME"]; NSLog(@"%@", title); } Error: 2011-01-29 00:18:50.386 NeighborMe[7763:207] -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0xb618840 2011-01-29 00:18:50.388 NeighborMe[7763:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0xb618840' *** Call stack at first throw: ( 0 CoreFoundation 0x027d9b99 __exceptionPreprocess + 185 1 libobjc.A.dylib 0x0292940e objc_exception_throw + 47 2 CoreFoundation 0x027db6ab -[NSObject(NSObject) doesNotRecognizeSelector:] + 187 3 CoreFoundation 0x0274b2b6 ___forwarding___ + 966 4 CoreFoundation 0x0274ae72 _CF_forwarding_prep_0 + 50 5 NeighborMe 0x0000bd75 -[NeighborListViewController connectionDidFinishLoading:] + 226 6 Foundation 0x0007cb96 -[NSURLConnection(NSURLConnectionReallyInternal) sendDidFinishLoading] + 108 7 Foundation 0x0007caef _NSURLConnectionDidFinishLoading + 133 8 CFNetwork 0x02d8d72f _ZN19URLConnectionClient23_clientDidFinishLoadingEPNS_26ClientConnectionEventQueueE + 285 9 CFNetwork 0x02e58fcf _ZN19URLConnectionClient26ClientConnectionEventQueue33processAllEventsAndConsumePayloadEP20XConnectionEventInfoI12XClientEvent18XClientEventParamsEl + 389 10 CFNetwork 0x02e5944b _ZN19URLConnectionClient26ClientConnectionEventQueue33processAllEventsAndConsumePayloadEP20XConnectionEventInfoI12XClientEvent18XClientEventParamsEl + 1537 11 CFNetwork 0x02d82968 _ZN19URLConnectionClient13processEventsEv + 100 12 CFNetwork 0x02d827e5 _ZN17MultiplexerSource7performEv + 251 13 CoreFoundation 0x027bafaf __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15 14 CoreFoundation 0x0271939b __CFRunLoopDoSources0 + 571 15 CoreFoundation 0x02718896 __CFRunLoopRun + 470 16 CoreFoundation 0x02718350 CFRunLoopRunSpecific + 208 17 CoreFoundation 0x02718271 CFRunLoopRunInMode + 97 18 GraphicsServices 0x030b800c GSEventRunModal + 217 19 GraphicsServices 0x030b80d1 GSEventRun + 115 20 UIKit 0x002e9af2 UIApplicationMain + 1160 21 NeighborMe 0x00001c34 main + 102 22 NeighborMe 0x00001bc5 start + 53 23 ??? 0x00000001 0x0 + 1 ) terminate called after throwing an instance of 'NSException' I really just wanted to be able to iterate through the names

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• how to slove error when using thread?

  - by ChandreshKanetiya

  I have following error msg in console when using NSThread "Tried to obtain the web lock from a thread other than the main thread or the web thread. This may be a result of calling to UIKit from a secondary thread. Crashing now..." I have submit my sample code here - (void)viewDidLoad { appDeleg = (NewAshley_MedisonAppDelegate *)[[UIApplication sharedApplication] delegate]; [[self tblView1] setRowHeight:80.0]; [super viewDidLoad]; self.title = @"Under Ground"; [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; [NSThread detachNewThreadSelector:@selector(CallParser) toTarget:self withObject:nil]; } -(void)CallParser { Parsing *parsing = [[Parsing alloc] init]; [parsing DownloadAndParseUnderground]; [parsing release]; [self Update_View]; //[myIndicator stopAnimating]; [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; } here "DownloadAndParseUnderground" is the method of downloding data from the rss feed and -(void) Update_View{ [self.tblView1 reloadData]; } when Update_View method is called the tableView reload Data and in the cellForRowAtIndexPath create error and not display custom cell - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; CustomTableviewCell *cell = (CustomTableviewCell *) [tblView1 dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { [[NSBundle mainBundle] loadNibNamed:@"customCell" owner:self options:nil]; cell = objCustCell; objCustCell = nil; }

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• obj-c classes and sub classes (Cocos2d) conversion

  - by Lewis

  Hi I'm using this version of cocos2d: https://github.com/krzysztofzablocki/CCNode-SFGestureRecognizers Which supports the UIGestureRecognizer within a CCLayer in a cocos2d scene like so: @interface HelloWorldLayer : CCLayer <UIGestureRecognizerDelegate> { } Now I want to make this custom gesture work within the scene, attaching it to a sprite in cocos2d: #import <Foundation/Foundation.h> #import <UIKit/UIGestureRecognizerSubclass.h> @protocol OneFingerRotationGestureRecognizerDelegate <NSObject> @optional - (void) rotation: (CGFloat) angle; - (void) finalAngle: (CGFloat) angle; @end @interface OneFingerRotationGestureRecognizer : UIGestureRecognizer { CGPoint midPoint; CGFloat innerRadius; CGFloat outerRadius; CGFloat cumulatedAngle; id <OneFingerRotationGestureRecognizerDelegate> target; } - (id) initWithMidPoint: (CGPoint) midPoint innerRadius: (CGFloat) innerRadius outerRadius: (CGFloat) outerRadius target: (id) target; - (void)reset; - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event; - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event; - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event; - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event; @end #include <math.h> #import "OneFingerRotationGestureRecognizer.h" @implementation OneFingerRotationGestureRecognizer // private helper functions CGFloat distanceBetweenPoints(CGPoint point1, CGPoint point2); CGFloat angleBetweenLinesInDegrees(CGPoint beginLineA, CGPoint endLineA, CGPoint beginLineB, CGPoint endLineB); - (id) initWithMidPoint: (CGPoint) _midPoint innerRadius: (CGFloat) _innerRadius outerRadius: (CGFloat) _outerRadius target: (id <OneFingerRotationGestureRecognizerDelegate>) _target { if ((self = [super initWithTarget: _target action: nil])) { midPoint = _midPoint; innerRadius = _innerRadius; outerRadius = _outerRadius; target = _target; } return self; } /** Calculates the distance between point1 and point 2. */ CGFloat distanceBetweenPoints(CGPoint point1, CGPoint point2) { CGFloat dx = point1.x - point2.x; CGFloat dy = point1.y - point2.y; return sqrt(dx*dx + dy*dy); } CGFloat angleBetweenLinesInDegrees(CGPoint beginLineA, CGPoint endLineA, CGPoint beginLineB, CGPoint endLineB) { CGFloat a = endLineA.x - beginLineA.x; CGFloat b = endLineA.y - beginLineA.y; CGFloat c = endLineB.x - beginLineB.x; CGFloat d = endLineB.y - beginLineB.y; CGFloat atanA = atan2(a, b); CGFloat atanB = atan2(c, d); // convert radiants to degrees return (atanA - atanB) * 180 / M_PI; } #pragma mark - UIGestureRecognizer implementation - (void)reset { [super reset]; cumulatedAngle = 0; } - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { [super touchesBegan:touches withEvent:event]; if ([touches count] != 1) { self.state = UIGestureRecognizerStateFailed; return; } } - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { [super touchesMoved:touches withEvent:event]; if (self.state == UIGestureRecognizerStateFailed) return; CGPoint nowPoint = [[touches anyObject] locationInView: self.view]; CGPoint prevPoint = [[touches anyObject] previousLocationInView: self.view]; // make sure the new point is within the area CGFloat distance = distanceBetweenPoints(midPoint, nowPoint); if ( innerRadius <= distance && distance <= outerRadius) { // calculate rotation angle between two points CGFloat angle = angleBetweenLinesInDegrees(midPoint, prevPoint, midPoint, nowPoint); // fix value, if the 12 o'clock position is between prevPoint and nowPoint if (angle > 180) { angle -= 360; } else if (angle < -180) { angle += 360; } // sum up single steps cumulatedAngle += angle; // call delegate if ([target respondsToSelector: @selector(rotation:)]) { [target rotation:angle]; } } else { // finger moved outside the area self.state = UIGestureRecognizerStateFailed; } } - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { [super touchesEnded:touches withEvent:event]; if (self.state == UIGestureRecognizerStatePossible) { self.state = UIGestureRecognizerStateRecognized; if ([target respondsToSelector: @selector(finalAngle:)]) { [target finalAngle:cumulatedAngle]; } } else { self.state = UIGestureRecognizerStateFailed; } cumulatedAngle = 0; } - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event { [super touchesCancelled:touches withEvent:event]; self.state = UIGestureRecognizerStateFailed; cumulatedAngle = 0; } @end Header file for view controller: #import "OneFingerRotationGestureRecognizer.h" @interface OneFingerRotationGestureViewController : UIViewController <OneFingerRotationGestureRecognizerDelegate> @property (nonatomic, strong) IBOutlet UIImageView *image; @property (nonatomic, strong) IBOutlet UITextField *textDisplay; @end then this is in the .m file: gestureRecognizer = [[OneFingerRotationGestureRecognizer alloc] initWithMidPoint: midPoint innerRadius: outRadius / 3 outerRadius: outRadius target: self]; [self.view addGestureRecognizer: gestureRecognizer]; Now my question is, is it possible to add this custom gesture into the cocos2d project found on that github, and if so, what do I need to change in the OneFingerRotationGestureRecognizerDelegate to get it to work within cocos2d. Because at the minute it is setup in a standard iOS project and not a cocos2d project and I do not know enough about UIViews and classing/ sub classing in obj-c to get this to work. Also it seems to inherit from a UIView where cocos2d uses CCLayer. Kind regards, Lewis. I also realise I may have not included enough code from the custom gesture project for readers to interpret it fully, so the full project can be found here: https://github.com/melle/OneFingerRotationGestureDemo

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• How can you add a UIGestureRecognizer to a UIBarButtonItem as in the common undo/redo UIPopoverContr

  - by SG

  Problem In my iPad app, I cannot attach a popover to a button bar item only after press-and-hold events. But this seems to be standard for undo/redo. How do other apps do this? Background I have an undo button (UIBarButtonSystemItemUndo) in the toolbar of my UIKit (iPad) app. When I press the undo button, it fires it's action which is undo:, and that executes correctly. However, the "standard UE convention" for undo/redo on iPad is that pressing undo executes an undo but pressing and holding the button reveals a popover controller where the user selected either "undo" or "redo" until the controller is dismissed. The normal way to attach a popover controller is with presentPopoverFromBarButtonItem:, and I can configure this easily enough. To get this to show only after press-and-hold we have to set a view to respond to "long press" gesture events as in this snippet: UILongPressGestureRecognizer *longPressOnUndoGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPressOnUndoGesture:)]; //Broken because there is no customView in a UIBarButtonSystemItemUndo item [self.undoButtonItem.customView addGestureRecognizer:longPressOnUndoGesture]; [longPressOnUndoGesture release]; With this, after a press-and-hold on the view the method handleLongPressOnUndoGesture: will get called, and within this method I will configure and display the popover for undo/redo. So far, so good. The problem with this is that there is no view to attach to. self.undoButtonItem is a UIButtonBarItem, not a view. Possible solutions 1) [The ideal] Attach the gesture recognizer to the button bar item. It is possible to attach a gesture recognizer to a view, but UIButtonBarItem is not a view. It does have a property for .customView, but that property is nil when the buttonbaritem is a standard system type (in this case it is). 2) Use another view. I could use the UIToolbar but that would require some weird hit-testing and be an all around hack, if even possible in the first place. There is no other alternative view to use that I can think of. 3) Use the customView property. Standard types like UIBarButtonSystemItemUndo have no customView (it is nil). Setting the customView will erase the standard contents which it needs to have. This would amount to re-implementing all the look and function of UIBarButtonSystemItemUndo, again if even possible to do. Question How can I attach a gesture recognizer to this "button"? More specifically, how can I implement the standard press-and-hold-to-show-redo-popover in an iPad app? Ideas? Thank you very much, especially if someone actually has this working in their app (I'm thinking of you, omni) and wants to share...

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• Where is my object allocation and memory leak in this iPhone/objective C code?

  - by Spottswoode

  Hello, I'm still a rookie when it comes to this programming gig and was wondering if someone could help me smooth out this code. Functionally, the code works great and does what I need it to do. But when I run the performance tool the allocation graph peaks, the CPU load is high, there's a leak(s), and I've also confirmed when running on my iPhone it seems noticeably slower then the rest of the components in my app. I'd appreciate any advice/tips/help anyone could give me. :) Thanks in advance! .h file // // Time_CalculatorViewController.h // Time Calculator // // Created by Adam Soloway on 2/19/10. // Copyright Legacy Pilots 2010. All rights reserved. // #import <UIKit/UIKit.h> @interface Time_CalculatorViewController : UIViewController { //BOOL moveViewUp; //CGFloat scrollAmount; IBOutlet UILabel *hoursLabel; IBOutlet UILabel *minutesLabel; IBOutlet UILabel *hoursDecimalLabel; IBOutlet UILabel *minutesDecimalLabel; IBOutlet UILabel *errorLabel; IBOutlet UITextField *minTextField1; IBOutlet UITextField *minTextField2; IBOutlet UITextField *minTextField3; IBOutlet UITextField *minTextField4; IBOutlet UITextField *minTextField5; IBOutlet UITextField *minTextField6; IBOutlet UITextField *minTextField7; IBOutlet UITextField *minTextField8; IBOutlet UITextField *minTextField9; IBOutlet UITextField *minTextField10; IBOutlet UITextField *hourTextField1; IBOutlet UITextField *hourTextField2; IBOutlet UITextField *hourTextField3; IBOutlet UITextField *hourTextField4; IBOutlet UITextField *hourTextField5; IBOutlet UITextField *hourTextField6; IBOutlet UITextField *hourTextField7; IBOutlet UITextField *hourTextField8; IBOutlet UITextField *hourTextField9; IBOutlet UITextField *hourTextField10; IBOutlet UIButton *resetAll; NSString *minutesString1; NSString *minutesString2; NSString *minutesString3; NSString *minutesString4; NSString *minutesString5; NSString *minutesString6; NSString *minutesString7; NSString *minutesString8; NSString *minutesString9; NSString *minutesString10; NSString *hoursString1; NSString *hoursString2; NSString *hoursString3; NSString *hoursString4; NSString *hoursString5; NSString *hoursString6; NSString *hoursString7; NSString *hoursString8; NSString *hoursString9; NSString *hoursString10; int hourDecimalNumber; int totalTime; int leftOverMinutes; int minuteNumber1; int minuteNumber2; int minuteNumber3; int minuteNumber4; int minuteNumber5; int minuteNumber6; int minuteNumber7; int minuteNumber8; int minuteNumber9; int minuteNumber10; int hourNumber1; int hourNumber2; int hourNumber3; int hourNumber4; int hourNumber5; int hourNumber6; int hourNumber7; int hourNumber8; int hourNumber9; int hourNumber10; } //- (void)scrollTheView:(BOOL)movedUp; - (void)calculateTime; - (IBAction)resetAllValues; @end .m file // // Time_CalculatorViewController.m // Time Calculator // // Created by Adam Soloway on 2/19/10. // Copyright Legacy Pilots 2010. All rights reserved. // #import "Time_CalculatorViewController.h" @implementation Time_CalculatorViewController - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { if( minTextField1.editing || minTextField2.editing || minTextField3.editing || minTextField4.editing || minTextField5.editing || minTextField6.editing || minTextField7.editing || minTextField8.editing || minTextField9.editing || minTextField10.editing || hourTextField1.editing || hourTextField2.editing || hourTextField3.editing || hourTextField4.editing || hourTextField5.editing || hourTextField6.editing || hourTextField7.editing || hourTextField8.editing || hourTextField9.editing || hourTextField10.editing) { [minTextField1 resignFirstResponder]; [minTextField2 resignFirstResponder]; [minTextField3 resignFirstResponder]; [minTextField4 resignFirstResponder]; [minTextField5 resignFirstResponder]; [minTextField6 resignFirstResponder]; [minTextField7 resignFirstResponder]; [minTextField8 resignFirstResponder]; [minTextField9 resignFirstResponder]; [minTextField10 resignFirstResponder]; [hourTextField1 resignFirstResponder]; [hourTextField2 resignFirstResponder]; [hourTextField3 resignFirstResponder]; [hourTextField4 resignFirstResponder]; [hourTextField5 resignFirstResponder]; [hourTextField6 resignFirstResponder]; [hourTextField7 resignFirstResponder]; [hourTextField8 resignFirstResponder]; [hourTextField9 resignFirstResponder]; [hourTextField10 resignFirstResponder]; [self calculateTime]; //if (moveViewUp) [self scrollTheView:NO]; } [super touchesBegan:touches withEvent:event]; } /* // The designated initializer. Override to perform setup that is required before the view is loaded. - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) { // Custom initialization } return self; } */ /* // Implement loadView to create a view hierarchy programmatically, without using a nib. - (void)loadView { } */ // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { [super viewDidLoad]; } /* // Override to allow orientations other than the default portrait orientation. - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Return YES for supported orientations return (interfaceOrientation == UIInterfaceOrientationPortrait); } */ - (void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } - (void)viewDidUnload { // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; } - (void)dealloc { [minutesString1 release]; [minutesString2 release]; [minutesString3 release]; [minutesString4 release]; [minutesString5 release]; [minutesString6 release]; [minutesString7 release]; [minutesString8 release]; [minutesString9 release]; [minutesString10 release]; [hoursString1 release]; [hoursString2 release]; [hoursString3 release]; [hoursString4 release]; [hoursString5 release]; [hoursString6 release]; [hoursString7 release]; [hoursString8 release]; [hoursString9 release]; [hoursString10 release]; [super dealloc]; } -(BOOL)textFieldShouldReturn:(UITextField *)theTextField { //[minTextField10 resignFirstResponder]; //if (moveViewUp) [self scrollTheView:NO]; [self calculateTime]; return YES; } - (IBAction)resetAllValues { minTextField1.text = 0; minTextField2.text = 0; minTextField3.text = 0; minTextField4.text = 0; minTextField5.text = 0; minTextField6.text = 0; minTextField7.text = 0; minTextField8.text = 0; minTextField9.text = 0; minTextField10.text = 0; hourTextField1.text = 0; hourTextField2.text = 0; hourTextField3.text = 0; hourTextField4.text = 0; hourTextField5.text = 0; hourTextField6.text = 0; hourTextField7.text = 0; hourTextField8.text = 0; hourTextField9.text = 0; hourTextField10.text = 0; totalTime = 0; leftOverMinutes = 0; hoursLabel.text = [NSString stringWithFormat:@"0"]; hourDecimalNumber = 0; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; minutesDecimalLabel.text = [NSString stringWithFormat:@"0"]; self.calculateTime; } - (void)calculateTime { minutesString1 = minTextField1.text; minutesString2 = minTextField2.text; minutesString3 = minTextField3.text; minutesString4 = minTextField4.text; minutesString5 = minTextField5.text; minutesString6 = minTextField6.text; minutesString7 = minTextField7.text; minutesString8 = minTextField8.text; minutesString9 = minTextField9.text; minutesString10 = minTextField10.text; hoursString1 = hourTextField1.text; hoursString2 = hourTextField2.text; hoursString3 = hourTextField3.text; hoursString4 = hourTextField4.text; hoursString5 = hourTextField5.text; hoursString6 = hourTextField6.text; hoursString7 = hourTextField7.text; hoursString8 = hourTextField8.text; hoursString9 = hourTextField9.text; hoursString10 = hourTextField10.text; minuteNumber1 = [minutesString1 intValue]; minuteNumber2 = [minutesString2 intValue]; minuteNumber3 = [minutesString3 intValue]; minuteNumber4 = [minutesString4 intValue]; minuteNumber5 = [minutesString5 intValue]; minuteNumber6 = [minutesString6 intValue]; minuteNumber7 = [minutesString7 intValue]; minuteNumber8 = [minutesString8 intValue]; minuteNumber9 = [minutesString9 intValue]; minuteNumber10 = [minutesString10 intValue]; hourNumber1 = ([hoursString1 intValue] * 60); hourNumber2 = ([hoursString2 intValue] * 60); hourNumber3 = ([hoursString3 intValue] * 60); hourNumber4 = ([hoursString4 intValue] * 60); hourNumber5 = ([hoursString5 intValue] * 60); hourNumber6 = ([hoursString6 intValue] * 60); hourNumber7 = ([hoursString7 intValue] * 60); hourNumber8 = ([hoursString8 intValue] * 60); hourNumber9 = ([hoursString9 intValue] * 60); hourNumber10 = ([hoursString10 intValue] * 60); totalTime = (hourNumber1 + hourNumber2 +hourNumber3 +hourNumber4 +hourNumber5 +hourNumber6 +hourNumber7 +hourNumber8 +hourNumber9 +hourNumber10 + minuteNumber1 + minuteNumber2 + minuteNumber3 + minuteNumber4 + minuteNumber5 +minuteNumber6 + minuteNumber7 + minuteNumber8 + minuteNumber9 + minuteNumber10); if (totalTime <= 59) { leftOverMinutes = totalTime; hoursLabel.text = [NSString stringWithFormat:@"0"]; hourDecimalNumber = 0; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >59 && totalTime <= 119){ leftOverMinutes = totalTime - 60; hoursLabel.text = [NSString stringWithFormat:@"1"]; hourDecimalNumber = 1; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >119 && totalTime <= 179){ leftOverMinutes = totalTime - 120; hoursLabel.text = [NSString stringWithFormat:@"2"]; hourDecimalNumber = 2; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >179 && totalTime <= 239){ leftOverMinutes = totalTime - 180; hoursLabel.text = [NSString stringWithFormat:@"3"]; hourDecimalNumber = 3; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >239 && totalTime <= 299){ leftOverMinutes = totalTime - 240; hoursLabel.text = [NSString stringWithFormat:@"4"]; hourDecimalNumber = 4; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >299 && totalTime <= 359){ leftOverMinutes = totalTime - 300; hoursLabel.text = [NSString stringWithFormat:@"5"]; hourDecimalNumber = 5; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >359 && totalTime <= 419){ leftOverMinutes = totalTime - 360; hoursLabel.text = [NSString stringWithFormat:@"6"]; hourDecimalNumber = 6; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >419 && totalTime <= 479){ leftOverMinutes = totalTime - 420; hoursLabel.text = [NSString stringWithFormat:@"7"]; hourDecimalNumber = 7; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >479 && totalTime <= 539){ leftOverMinutes = totalTime - 480; hoursLabel.text = [NSString stringWithFormat:@"8"]; hourDecimalNumber = 8; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >539 && totalTime <= 599){ leftOverMinutes = totalTime - 540; hoursLabel.text = [NSString stringWithFormat:@"9"]; hourDecimalNumber = 9; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >599 && totalTime <= 659){ leftOverMinutes = totalTime - 600; hoursLabel.text = [NSString stringWithFormat:@"10"]; hourDecimalNumber = 10; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >659 && totalTime <= 719){ leftOverMinutes = totalTime - 660; hoursLabel.text = [NSString stringWithFormat:@"11"]; hourDecimalNumber = 11; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >719 && totalTime <= 779){ leftOverMinutes = totalTime - 720; hoursLabel.text = [NSString stringWithFormat:@"12"]; hourDecimalNumber = 12; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >779 && totalTime <= 839){ leftOverMinutes = totalTime - 780; hoursLabel.text = [NSString stringWithFormat:@"13"]; hourDecimalNumber = 13; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >839 && totalTime <= 899){ leftOverMinutes = totalTime - 840; hoursLabel.text = [NSString stringWithFormat:@"14"]; hourDecimalNumber = 14; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >899 && totalTime <= 959){ leftOverMinutes = totalTime - 900; hoursLabel.text = [NSString stringWithFormat:@"15"]; hourDecimalNumber = 15; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >959 && totalTime <= 1019){ leftOverMinutes = totalTime - 960; hoursLabel.text = [NSString stringWithFormat:@"16"]; hourDecimalNumber = 16; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >1019 && totalTime <= 1079){ leftOverMinutes = totalTime - 1020; hoursLabel.text = [NSString stringWithFormat:@"17"]; hourDecimalNumber = 17; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >1079 && totalTime <= 1139){ leftOverMinutes = totalTime - 1080; hoursLabel.text = [NSString stringWithFormat:@"18"]; hourDecimalNumber = 18; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >1139 && totalTime <= 1199){ leftOverMinutes = totalTime - 1140; hoursLabel.text = [NSString stringWithFormat:@"19"]; hourDecimalNumber = 19; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >1199 && totalTime <= 1259){ leftOverMinutes = totalTime - 1200; hoursLabel.text = [NSString stringWithFormat:@"20"]; hourDecimalNumber = 20; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >1259 && totalTime <= 1319){ leftOverMinutes = totalTime - 1260; hoursLabel.text = [NSString stringWithFormat:@"21"]; hourDecimalNumber = 21; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >1319 && totalTime <= 1379){ leftOverMinutes = totalTime - 1320; hoursLabel.text = [NSString stringWithFormat:@"22"]; hourDecimalNumber = 22; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >1379 && totalTime <= 1439){ leftOverMinutes = totalTime - 1380; hoursLabel.text = [NSString stringWithFormat:@"23"]; hourDecimalNumber = 23; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >1439 && totalTime <= 1499){ leftOverMinutes = totalTime - 1440; hoursLabel.text = [NSString stringWithFormat:@"24"]; hourDecimalNumber = 24; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >1499 && totalTime <= 1559){ leftOverMinutes = totalTime - 1500; hoursLabel.text = [NSString stringWithFormat:@"25"]; hourDecimalNumber = 25; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >1559 && totalTime <= 1619){ leftOverMinutes = totalTime - 1560; hoursLabel.text = [NSString stringWithFormat:@"26"]; hourDecimalNumber = 26; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >1619 && totalTime <= 1679){ leftOverMinutes = totalTime - 1620; hoursLabel.text = [NSString stringWithFormat:@"27"]; hourDecimalNumber = 27; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >1679 && totalTime <= 1739){ leftOverMinutes = totalTime - 1680; hoursLabel.text = [NSString stringWithFormat:@"28"]; hourDecimalNumber = 28; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >1739 && totalTime <= 1799){ leftOverMinutes = totalTime - 1740; hoursLabel.text = [NSString stringWithFormat:@"29"]; hourDecimalNumber = 29; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >1799 && totalTime <= 1859){ leftOverMinutes = totalTime - 1800; hoursLabel.text = [NSString stringWithFormat:@"30"]; hourDecimalNumber = 30; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; errorLabel.hidden = TRUE; } else if (totalTime >1859){ hoursLabel.text = [NSString stringWithFormat:@"Error"]; hoursDecimalLabel.text = [NSString stringWithFormat:@"Error"]; errorLabel.hidden = FALSE; } //Minutes Label if (leftOverMinutes < 10) { minutesLabel.text = [NSString stringWithFormat:@"0%d", leftOverMinutes]; } else minutesLabel.text = [NSString stringWithFormat:@"%d", leftOverMinutes]; //Minutes Decimal Label if (leftOverMinutes >=0 && leftOverMinutes <=2) { minutesDecimalLabel.text = [NSString stringWithFormat:@"0"]; } else if (leftOverMinutes >=3 && leftOverMinutes <=8){ minutesDecimalLabel.text = [NSString stringWithFormat:@"1"]; } else if (leftOverMinutes >=9 && leftOverMinutes <=14){ minutesDecimalLabel.text = [NSString stringWithFormat:@"2"]; } else if (leftOverMinutes >=15 && leftOverMinutes <=20){ minutesDecimalLabel.text = [NSString stringWithFormat:@"3"]; } else if (leftOverMinutes >=21 && leftOverMinutes <=26){ minutesDecimalLabel.text = [NSString stringWithFormat:@"4"]; } else if (leftOverMinutes >=27 && leftOverMinutes <=32){ minutesDecimalLabel.text = [NSString stringWithFormat:@"5"]; } else if (leftOverMinutes >=33 && leftOverMinutes <=38){ minutesDecimalLabel.text = [NSString stringWithFormat:@"6"]; } else if (leftOverMinutes >=39 && leftOverMinutes <=44){ minutesDecimalLabel.text = [NSString stringWithFormat:@"7"]; } else if (leftOverMinutes >=45 && leftOverMinutes <=50){ minutesDecimalLabel.text = [NSString stringWithFormat:@"8"]; } else if (leftOverMinutes >=51 && leftOverMinutes <=56){ minutesDecimalLabel.text = [NSString stringWithFormat:@"9"]; } else if (leftOverMinutes >=57 && leftOverMinutes <=60){ minutesDecimalLabel.text = [NSString stringWithFormat:@"0"]; hourDecimalNumber = hourDecimalNumber + 1; hoursDecimalLabel.text = [NSString stringWithFormat:@"%i", hourDecimalNumber]; } } @end

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• Strange crashes when using MPMoviePlayerController in iPad and iPad simulator with iOS 4.2.

  - by Dave L

  I'm getting crashes when trying to play a movie using MPMoviePlayerController on the iPad and in the iPad simulator using iOS 4.2. I am building using xcode 3.2.5 and the 4.2 SDK. When running on an iPad using iOS 3.2 or in the iPad simulator 3.2, the same code works fine, but on an iPad running 4.2 or in the iPad simulator 4.2, it crashes. The crash is due to an exception for calling an unknown selector down somewhere deep in the cocoa libraries, something tries to call a selector called "setHitRectInsets:" on a UIButton object. Also, the crash happens after control has returned to the main event loop. Anybody have any idea what might be causing this? Here is the code (roughly, some extraneous stuff deleted that doesn't seem to have any effect) that is crashing: NSString *fullMovieFilename = [[NSBundle mainBundle] pathForResource:@"movie" ofType:@"m4v"]; NSURL *movieURL = [NSURL fileURLWithPath:fullMovieFilename]; moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:movieURL]; moviePlayer.controlStyle = MPMovieControlStyleNone; // crash happens regardless of the setting here [moviePlayer.view setFrame:self.view.bounds]; [self.view addSubview:moviePlayer.view]; [moviePlayer setFullscreen:YES animated:YES]; // crash happens whether i use fullscreen or not [moviePlayer play]; The same code also works just find if I build using Xcode 3.2.3 and the 4.0 SDK. The crash stack trace looks like this: 2011-03-04 23:08:22.017 MyApp[31610:207] -[UIButton setHitRectInsets:]: unrecognized selector sent to instance 0x990bc60 2011-03-04 23:08:22.020 MyApp[31610:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIButton setHitRectInsets:]: unrecognized selector sent to instance 0x990bc60' *** Call stack at first throw: ( 0 CoreFoundation 0x0151abe9 __exceptionPreprocess + 185 1 libobjc.A.dylib 0x0166f5c2 objc_exception_throw + 47 2 CoreFoundation 0x0151c6fb -[NSObject(NSObject) doesNotRecognizeSelector:] + 187 3 CoreFoundation 0x0148c366 ___forwarding___ + 966 4 CoreFoundation 0x0148bf22 _CF_forwarding_prep_0 + 50 5 MediaPlayer 0x011b5bdb -[MPTransportControls createButtonForPart:] + 380 6 MediaPlayer 0x011b65d5 -[MPTransportControls _updateAdditions:removals:forPart:] + 110 7 MediaPlayer 0x011b4d78 -[MPTransportControls _reloadViewWithAnimation:] + 299 8 MediaPlayer 0x011b621a -[MPTransportControls setVisibleParts:] + 49 9 MediaPlayer 0x011b6e4a -[MPTransportControls initWithFrame:] + 173 10 MediaPlayer 0x011f9188 -[MPInlineTransportControls initWithFrame:] + 78 11 MediaPlayer 0x011f193a -[MPInlineVideoOverlay layoutSubviews] + 158 12 QuartzCore 0x00d6e451 -[CALayer layoutSublayers] + 181 13 QuartzCore 0x00d6e17c CALayerLayoutIfNeeded + 220 14 QuartzCore 0x00d6e088 -[CALayer layoutIfNeeded] + 111 15 MediaPlayer 0x011f130c -[MPInlineVideoOverlay setAllowsWirelessPlayback:] + 46 16 MediaPlayer 0x011f5b0d -[MPInlineVideoViewController _overlayView] + 526 17 MediaPlayer 0x011f6359 -[MPInlineVideoViewController _layoutForItemTypeAvailable] + 1350 18 Foundation 0x000e56c1 _nsnote_callback + 145 19 CoreFoundation 0x014f2f99 __CFXNotificationPost_old + 745 20 CoreFoundation 0x0147233a _CFXNotificationPostNotification + 186 21 Foundation 0x000db266 -[NSNotificationCenter postNotificationName:object:userInfo:] + 134 22 Foundation 0x000e75a9 -[NSNotificationCenter postNotificationName:object:] + 56 23 MediaPlayer 0x01184dd6 -[MPAVItem _updateForNaturalSizeChange] + 278 24 MediaPlayer 0x011818e4 __-[MPAVItem blockForDirectAVControllerNotificationReferencingItem:]_block_invoke_1 + 82 25 MediaPlayer 0x011899ba -[MPAVController _postMPAVControllerSizeDidChangeNotificationWithItem:] + 138 26 Foundation 0x000e56c1 _nsnote_callback + 145 27 CoreFoundation 0x014f2f99 __CFXNotificationPost_old + 745 28 CoreFoundation 0x0147233a _CFXNotificationPostNotification + 186 29 Foundation 0x000db266 -[NSNotificationCenter postNotificationName:object:userInfo:] + 134 30 Celestial 0x052a35b2 -[NSObject(NSObject_AVShared) postNotificationWithDescription:] + 176 31 Celestial 0x052ab214 -[AVController fpItemNotification:sender:] + 735 32 Celestial 0x052b5305 -[AVPlaybackItem fpItemNotificationInfo:] + 640 33 Celestial 0x052a3d5c -[AVObjectRegistry safeInvokeWithDescription:] + 211 34 Foundation 0x000fa9a6 __NSThreadPerformPerform + 251 35 CoreFoundation 0x014fc01f __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15 36 CoreFoundation 0x0145a28b __CFRunLoopDoSources0 + 571 37 CoreFoundation 0x01459786 __CFRunLoopRun + 470 38 CoreFoundation 0x01459240 CFRunLoopRunSpecific + 208 39 CoreFoundation 0x01459161 CFRunLoopRunInMode + 97 40 GraphicsServices 0x01e4f268 GSEventRunModal + 217 41 GraphicsServices 0x01e4f32d GSEventRun + 115 42 UIKit 0x0038a42e UIApplicationMain + 1160 43 MyApp 0x0000837a main + 102 44 MpApp 0x00002009 start + 53 ) terminate called after throwing an instance of 'NSException' Been fighting with this for several days, and have searched the internet quite a bit for anybody having similar problems, all with no luck. Any suggestions would be greatly appreciated.

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• XCode linking error when targeting armv7.

  - by Tom

  I've already spent countless hours puzzling over this, utilizing Google searches and other Stack Overflow questions to no avail. I have an iPhone/iPad universal application, which seems to compile fine when the target is armv6. However, when the device is iPad, I get this warning: warning: building for SDK 'Device - iPhone OS 3.2' requires an armv7 architecture. Oddly enough, the app still runs great on iPad in spite of this warning. However, I do want to do things the "right way" what ever that means in this case. When I switch the target architecture to armv7, I get linking errors: "___restore_vfp_d8_d15_regs", referenced from: *redacted* "___save_vfp_d8_d15_regs", referenced from: *redacted* ld: symbol(s) not found collect2: ld returned 1 exit status The "redacted" portions of the errors are references to the static library to which I'm trying to link. Here's what I've tried from the many suggestions online. Each of these were suggested more than once without any explanation, which leads me to believe nobody quite understands this problem: "Never use the drop down menu in the upper left of the XCode window to choose the target. Instead, set this to Base SDK and then the Base SDK to iPhone OS 3.0 in the target configuration. Set the target device to your preferred target (iPad, iPhone OS 3.2 in my situation.)" This yields the error "Library not found for -lcrt1.3.1.o" "Make sure that GCC isn't linking against the wrong version of the standard library. (You'll have to make sure the LIBRARY_SEARCH_PATH doesn't have the wrong path in it.)" My LIBRARY_SEARCH_PATH is already empty, so this doesn't seem relevant. "Try compiling with GCC 4.0 rather than GCC 4.2." I get a syntax error inside a UIKit header file. The error is "Syntax error before 'AT_NAME' token." The line is "UIKIT_EXTERN @interface UILocalizedIndexedCollation : NSObject." Another project compiles just fine with the same target settings, which is really making me question my sanity. Could I be dealing with a corrupt XCode project? If anyone knows what's actually happening and has a reference or doesn't mind explaining it, I would be so very grateful. Cheers!

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• copied the reachability-test from apple, but the linker gives a failure

  - by nico

  i have tried to use the reachability-project published by apple to detect a reachability in an own example. i copied the most initialization, but i get this failure in the linker: Ld build/switchViews.build/Debug-iphoneos/test.build/Objects-normal/armv6/test normal armv6 cd /Users/uid04100/Documents/TEST setenv IPHONEOS_DEPLOYMENT_TARGET 3.1.3 setenv PATH "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin" /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc-4.2 -arch armv6 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.1.3.sdk -L/Users/uid04100/Documents/TEST/build/Debug-iphoneos -F/Users/uid04100/Documents/TEST/build/Debug-iphoneos -filelist /Users/uid04100/Documents/TEST/build/switchViews.build/Debug-iphoneos/test.build/Objects-normal/armv6/test.LinkFileList -dead_strip -miphoneos-version-min=3.1.3 -framework Foundation -framework UIKit -framework CoreGraphics -o /Users/uid04100/Documents/TEST/build/switchViews.build/Debug-iphoneos/test.build/Objects-normal/armv6/test Undefined symbols: "_SCNetworkReachabilitySetCallback", referenced from: -[Reachability startNotifer] in Reachability.o "_SCNetworkReachabilityCreateWithAddress", referenced from: +[Reachability reachabilityWithAddress:] in Reachability.o "_SCNetworkReachabilityScheduleWithRunLoop", referenced from: -[Reachability startNotifer] in Reachability.o "_SCNetworkReachabilityGetFlags", referenced from: -[Reachability connectionRequired] in Reachability.o -[Reachability currentReachabilityStatus] in Reachability.o "_SCNetworkReachabilityUnscheduleFromRunLoop", referenced from: -[Reachability stopNotifer] in Reachability.o "_SCNetworkReachabilityCreateWithName", referenced from: +[Reachability reachabilityWithHostName:] in Reachability.o ld: symbol(s) not found collect2: ld returned 1 exit status my delegate.h: import @class Reachability; @interface testAppDelegate : NSObject { UIWindow *window; UINavigationController *navigationController; Reachability* hostReach; Reachability* internetReach; Reachability* wifiReach; } @property (nonatomic, retain) IBOutlet UIWindow *window; @property (nonatomic, retain) IBOutlet UINavigationController *navigationController; @end my delegate.m: import "testAppDelegate.h" import "SecondViewController.h" import "Reachability.h" @implementation testAppDelegate @synthesize window; @synthesize navigationController; (void) updateInterfaceWithReachability: (Reachability*) curReach { if(curReach == hostReach) { BOOL connectionRequired= [curReach connectionRequired]; if(connectionRequired) { //in these brackets schould be some code with sense, if i´m getting it to run } else { } } if(curReach == internetReach) { } if(curReach == wifiReach) { } } //Called by Reachability whenever status changes. - (void) reachabilityChanged: (NSNotification* )note { Reachability* curReach = [note object]; NSParameterAssert([curReach isKindOfClass: [Reachability class]]); [self updateInterfaceWithReachability: curReach]; } (void)applicationDidFinishLaunching:(UIApplication *)application { // Override point for customization after application launch // Observe the kNetworkReachabilityChangedNotification. When that notification is posted, the // method "reachabilityChanged" will be called. // [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(reachabilityChanged:) name: kReachabilityChangedNotification object: nil]; //Change the host name here to change the server your monitoring hostReach = [[Reachability reachabilityWithHostName: @"www.apple.com"] retain]; [hostReach startNotifer]; [self updateInterfaceWithReachability: hostReach]; internetReach = [[Reachability reachabilityForInternetConnection] retain]; [internetReach startNotifer]; [self updateInterfaceWithReachability: internetReach]; wifiReach = [[Reachability reachabilityForLocalWiFi] retain]; [wifiReach startNotifer]; [self updateInterfaceWithReachability:wifiReach]; [window addSubview:[navigationController view]]; [window makeKeyAndVisible]; } (void)dealloc { [navigationController release]; [window release]; [super dealloc]; } @end

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• I getting exception, while deleting a row using " commitEditingStyle " method in iPhone simulator.

  - by Madan Mohan

  Hi, I am getting exception by deleting a row from the table view. (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { if(isEdit == YES) { if([editObject.contactList count]0) { return [editObject.contactList count]+1; } else { return 1; } } else if(isEdit == NO) { if([addContactList count]0) { return [addContactList count]+1; } else { return 1; } } return 0; } (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return 1; } -(UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath { if(isEdit == YES) { int sectionNum=[editObject.contactList count]-1; if([editObject.contactList count]0) { for( int i=0; i<=[editObject.contactList count]-1;i++) { if(indexPath.section == i) { return UITableViewCellEditingStyleDelete; } } if(indexPath.section == sectionNum+1) { return UITableViewCellEditingStyleInsert; } } else { if(indexPath.section == 0) { return UITableViewCellEditingStyleInsert; } } } else { if([addContactList count]0) { int sectionNum=[addContactList count]-1; for( int i=0; i<=[addContactList count]-1;i++) { if(indexPath.section == i) { return UITableViewCellEditingStyleDelete; } } if(indexPath.section == sectionNum+1) { return UITableViewCellEditingStyleInsert; } } else { if(indexPath.section == 0) { return UITableViewCellEditingStyleInsert; } } } return UITableViewCellEditingStyleNone; } (void)tableView:(UITableView *)tv commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath { if(isEdit == YES) { if(editingStyle == UITableViewCellEditingStyleDelete) { for(int i=0;i<=[editObject.contactList count]-1;i++) { if(indexPath.section == i) { [editObject.contactList removeObjectAtIndex:indexPath.row]; [theTableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; } } } else { //adding } [theTableView reloadData]; } else { if(editingStyle == UITableViewCellEditingStyleDelete) { for(int i=0;i<=[addContactList count]-1;i++) { if(indexPath.section == i) { [addContactList removeObjectAtIndex:indexPath.row]; [theTableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; // getting exception here in this line at indexpath [theTableView reloadData]; } } } else { //adding } [theTableView reloadData]; } } the exception as 2010-04-28 13:55:30.063 Zoho[2818:20b] * Assertion failure in -[UITableView _endCellAnimationsWithContext:], /SourceCache/UIKit_Sim/UIKit-984.38/UITableView.m:772 2010-04-28 13:55:30.064 Zoho[2818:20b] * Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid update: invalid number of sections. The number of sections contained in the table view after the update (2) must be equal to the number of sections contained in the table view before the update (3), plus or minus the number of sections inserted or deleted (0 inserted, 0 deleted).' 2010-04-28 13:55:30.065 Zoho[2818:20b] Stack: ( 10490971, 2437656123, 10574907

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• Updating a deallocated UIWebView from a background thread

  - by Dan Ray

  As you can see from the title, I've programmed myself into a corner and I've got several things working against me... In a UIViewController subclass that manages a large and complex view. One part of it is a UIWebView that contains output from a web request that I had to build and execute, and manually assemble HTML from. Since it takes a second or two to run, I dropped it into the background by calling self performSelectorInBackground:. Then from that method I call there, I use self performSelectorOnMainThread: to get back to the surface of the thread stack to update the UIWebView with what I just got. Like this (which I've cut down to show only the relevant issues): -(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation { //then get mapquest directions NSLog(@"Got called to handle new location!"); [manager stopUpdatingLocation]; [self performSelectorInBackground:@selector(getDirectionsFromHere:) withObject:newLocation]; } - (void)getDirectionsFromHere:(CLLocation *)newLocation { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; CLLocationCoordinate2D here = newLocation.coordinate; // assemble a call to the MapQuest directions API in NSString *dirURL // ...cut for brevity NSLog(@"Query is %@", dirURL); NSString *response = [NSString stringWithContentsOfURL:[NSURL URLWithString:dirURL] encoding:NSUTF8StringEncoding error:NULL]; NSMutableString *directionsOutput = [[NSMutableString alloc] init]; // assemble response into an HTML table in NSString *directionsOutput // ...cut for brevity [self performSelectorOnMainThread:@selector(updateDirectionsWithHtml:) withObject:directionsOutput waitUntilDone:NO]; [directionsOutput release]; [pool drain]; [pool release]; } - (void)updateDirectionsWithHtml:(NSString *)directionsOutput { [self.directionsWebView loadHTMLString:directionsOutput baseURL:nil]; } This all works totally great, UNLESS I've backed out of this view controller before CLLocationManager hits its delegate method. If this happens after I've already left this view, I get: 2010-06-07 16:38:08.508 EverWondr[180:760b] bool _WebTryThreadLock(bool), 0x1b6830: Tried to obtain the web lock from a thread other than the main thread or the web thread. This may be a result of calling to UIKit from a secondary thread. Crashing now... Despite what this says, I can repeatably cause this crash when I back out too early. I'm not at all convinced that attempting a UI update from a background thread is really the issue; I think it's that my UIWebView is deallocated. I suspect that the fact I was just IN a background thread makes the runtime suspect something's up about that, but I feel fairly sure that's not it. So how do I tell CLLocationManager not to worry about it, when I'm backing out of that view? I tried [self.locationManager stopUpdatingLocation] inside my viewWillDisappear method, but that didn't do it. (Incidentally, MapQuest's apis are FANTASTIC. Way WAY better than anything Google provides. I can't recommend them highly enough.)

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• iPhone: Problems releasing UIViewController in a multithreaded environment

  - by bart-simpson

  Hi! I have a UIViewController and in that controller, i am fetching an image from a URL source. The image is fetched in a separate thread after which the user-interface is updated on the main thread. This controller is displayed as a page in a UIScrollView parent which is implemented to release controllers that are not in view anymore. When the thread finishes fetching content before the UIViewController is released, everything works fine - but when the user scrolls to another page before the thread finishes, the controller is released and the only handle to the controller is owned by the thread making releaseCount of the controller equals to 1. Now, as soon as the thread drains NSAutoreleasePool, the controller gets releases because the releaseCount becomes 0. At this point, my application crashes and i get the following error message: bool _WebTryThreadLock(bool), 0x4d99c60: Tried to obtain the web lock from a thread other than the main thread or the web thread. This may be a result of calling to UIKit from a secondary thread. Crashing now... The backtrace reveals that the application crashed on the call to [super dealloc] and it makes total sense because the dealloc function must have been triggered by the thread when the pool was drained. My question is, how i can overcome this error and release the controller without leaking memory? One solution that i tried was to call [self retain] before the pool is drained so that retainCount doesn't fall to zero and then using the following code to release controller in the main thread: [self performSelectorOnMainThread:@selector(autorelease) withObject:nil waitUntilDone:NO]; Unfortunately, this did not work out. Below is the function that is executed on a thread: - (void)thread_fetchContent { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; NSURL *imgURL = [NSURL URLWithString:@"http://www.domain.com/image.png"]; // UIImage *imgHotspot is declared as private - The image is retained // here and released as soon as it is assigned to UIImageView imgHotspot = [[[UIImage alloc] initWithData: [NSData dataWithContentsOfURL: imgURL]] retain]; if ([self retainCount] == 1) { [self retain]; // increment retain count ~ workaround [pool drain]; // drain pool // this doesn't work - i get the same error [self performSelectorOnMainThread:@selector(autorelease) withObject:nil waitUntilDone:NO]; } else { // show fetched image on the main thread - this works fine! [self performSelectorOnMainThread:@selector(showImage) withObject:nil waitUntilDone:NO]; [pool drain]; } } Please help! Thank you in advance.

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• Very simple test view in MonoTouch draws a line using Core Graphics but view content is not shown

  - by Krumelur

  Hi, I give up now on this very simple test I've been trying to run. I want to add a subview to my window which does nothing but draw a line from one corner of the iPhone's screen to the other and then, using touchesMoved() it is supposed to draw a line from the last to the current point. The issues: 1. Already the initial line is not visible. 2. When using Interface Builder, the initial line is visible, but drawRect() is never called, even if I call SetNeedsDisplay(). It can't be that hard...can somebody fix the code below to make it work? In main.cs in FinishedLaunching(): oView = new TestView(); oView.AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight; oView.Frame = new System.Drawing.RectangleF(0, 0, 320, 480); window.AddSubview(oView); window.MakeKeyAndVisible (); The TestView.cs: using System; using MonoTouch.UIKit; using MonoTouch.CoreGraphics; using System.Drawing; using MonoTouch.CoreAnimation; using MonoTouch.Foundation; namespace Test { public class TestView : UIView { public TestView () : base() { } public override void DrawRect (RectangleF area, UIViewPrintFormatter formatter) { CGContext oContext = UIGraphics.GetCurrentContext(); oContext.SetStrokeColor(UIColor.Red.CGColor.Components); oContext.SetLineWidth(3.0f); this.oLastPoint.Y = UIScreen.MainScreen.ApplicationFrame.Size.Height - this.oLastPoint.Y; this.oCurrentPoint.Y = UIScreen.MainScreen.ApplicationFrame.Size.Height - this.oCurrentPoint.Y; oContext.StrokeLineSegments(new PointF[] {this.oLastPoint, this.oCurrentPoint }); oContext.Flush(); oContext.RestoreState(); Console.Out.WriteLine("Current X: {0}, Y: {1}", oCurrentPoint.X.ToString(), oCurrentPoint.Y.ToString()); Console.Out.WriteLine("Last X: {0}, Y: {1}", oLastPoint.X.ToString(), oLastPoint.Y.ToString()); } private PointF oCurrentPoint = new PointF(0, 0); private PointF oLastPoint = new PointF(320, 480); public override void TouchesMoved (MonoTouch.Foundation.NSSet touches, UIEvent evt) { base.TouchesMoved (touches, evt); UITouch oTouch = (UITouch)touches.AnyObject; this.oCurrentPoint = oTouch.LocationInView(this); this.oLastPoint = oTouch.PreviousLocationInView(this); this.SetNeedsDisplay(); } } }

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• Xcode App Crash-When connecting to the ODATA services [on hold]

  - by user3685677

  Can someone help me resolving the following issue: When trying to connect from iPad app to SAP ECC system through ODATA channel services via SUP, it is allowing me to login for the first time and could retrieve the data successfully from SAP system. But when I logout and try logging in again with the same session, application gets crashed. Below is the crash report for your reference. I am using SDM Parser to connect the SAP system. SDMODataServiceDocumentParser *sdmDocParser = [[SDMODataServiceDocumentParser alloc] init]; [sdmDocParser parse:aServiceDocument]; m_serviceDocument = sdmDocParser.serviceDocument; //Load the object with metadata xml: SDMODataMetaDocumentParser *sdmMetadataParser = [[SDMODataMetaDocumentParser alloc] initWithServiceDocument:m_serviceDocument]; [sdmMetadataParser parse:aMetadata]; After initiated the service, setting the URL. [service setServiceDocumentUrl:m_serviceDocumentURL]; Using SDMconnectivityhelper to connect the URL id<SDMRequesting> serviceDocumentRequest2 = [connectivityHelper executeBasicSyncRequestWithQuery3:[[ODataQuery alloc]initWithURL:[NSURL URLWithString:encodedStrUrl]]] ; - (id <SDMRequesting>)executeBasicSyncRequestWithQuery3:(ODataQuery *)aQuery { id<SDMRequesting> request = [self createRequestWithQuery:aQuery]; [request setTimeOutSeconds:TIMEOUT_SEC]; [request setRequestMethod:@"GET"]; [request addRequestHeader:@"Content-Type" value:@"application/xml"]; [request startSynchronous];**[App getting CRASH in this line]** return request; } - (id <SDMRequesting>)createRequestWithQuery:(ODataQuery *)aQuery { if (isSUPMode) { [SDMRequestBuilder setRequestType:SUPRequestType]; } else { [SDMRequestBuilder setRequestType:HTTPRequestType]; } id <SDMRequesting> request = [SDMRequestBuilder requestWithURL:aQuery.URL]; request.username = self.username; request.password = self.password; return request; } Crash Report:- Incident Identifier: 347511BA-5F7F-45D4-8662-D5DCD2F88EA7 CrashReporter Key: 9a4d38cf19b1a94476eb6b2170d4f56678d6ca60 Hardware Model: iPad3,4 Path: /var/mobile/Applications/F38AD64F-03F8-4A21- Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Subtype: KERN_INVALID_ADDRESS at 0x00000000 Triggered by Thread: 0 Thread 0 Crashed: 0 libsystem_platform.dylib 0x393a94c0 _platform_memmove$VARIANT $Swift + 160 1 Eby Sales Order 0x0015a2c8 0xb7000 + 668360 2 Eby Sales Order 0x0015a8b8 0xb7000 + 669880 3 Eby Sales Order 0x003331ee 0xb7000 + 2605550 4 Eby Sales Order 0x0031856e 0xb7000 + 2495854 5 Eby Sales Order 0x00338454 0xb7000 + 2626644 6 Eby Sales Order 0x000e6ad8 0xb7000 + 195288 7 Eby Sales Order 0x000e99a0 0xb7000 + 207264 8 Eby Sales Order 0x000ea442 0xb7000 + 209986 9 Eby Sales Order 0x000eb0d6 0xb7000 + 213206 10 Eby Sales Order 0x000c13d0 0xb7000 + 41936 11 Foundation 0x2ec93112 __NSFireDelayedPerform + 410 12 CoreFoundation 0x2e27ef4c __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 12 13 CoreFoundation 0x2e27eb66 __CFRunLoopDoTimer + 790 14 CoreFoundation 0x2e27ceee __CFRunLoopRun + 1214 15 CoreFoundation 0x2e1e7764 CFRunLoopRunSpecific + 520 16 CoreFoundation 0x2e1e7546 CFRunLoopRunInMode + 102 17 GraphicsServices 0x331216ce GSEventRunModal + 134 18 UIKit 0x30b4688c UIApplicationMain + 1132 19 Eby Sales Order 0x000bd8da 0xb7000 + 26842 20 Eby Sales Order 0x000bd89c 0xb7000 + 26780

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• Xcode/iPhone Development 6 months in - Annoyances

  - by clearbrian

  Hi I've been iPhone programming for 6 months and come from a PC/Java/Eclipse background and still have a few annoyances with Xcode/iPhone programming I wonder are there any shortcuts to. Is there any way to prevent multiple windows opening all the time in XCode? a) When you click on the Errors/Warnings in the bottom right of the status bar build errors are shown in separate window. Any way to get these to show in the main editor? b) Anyway to get debugger to appear in main editor. I have a big screen iMac and it's still window hell on Macs. When you come from Alt-Tab the Mac is a nightmare. 2) Anyway to get a toolbar item on the main editor to: a) Open Console (I know CMD-thingy-R) b) Open Break points (you have to open Debugger first then breakpoints) I know there's keyboard shortcuts but I have only left hand free others on the trackball so any keys on right hand side of keyboard are too far. I know you can add Finder toolbar scripts (just wondering if anyway to extend Xcode). Are there utilities to extend Xcode? Scripts/Automator/Any Services I can setup to help. Can you automate Xcode like you can with Windows/ActiveX/VBA 3) Limit lookups using CMD + double click. If I double click on a variable to find its definition using CMD + double click it shows every occurrence of all variables with that name. (annoying it you name all you maps mapView) Anyway to get it to limit to the current class or at least order so current class is first. 4) Find doesn't seem to loop backwards if result all above cursor position I'm in a class and I hit CMD + F for find. Find box appears. I enter some text hit return. It says I have x matches but only back arrow is highlight in Find But when I hit < it does nothing. I need to scroll to the top and redo the search. If the text is both forwards and backwards then both < are highlighted and it works. is this a bug or a 'feature' Missing Eclipse features I have been looking at the User Script menu but was wondering how powerful they are? 5) any scripts around to generate source from members such as description: @property @synthesize if I add a new member, run a script will generate @property/@syntesize and release in dealloc 7) any good sites for scripts? SCM Im having problems with SCM and Folders on HD under project Classes directory. You get a library e.g. JSON. It usually comes as a folder. You copy it to the /Classes for your project. /Classes/JSON I create a Group for the Library in Xcode under Classes group. Classes JSON I drag the files from the folder into xcode into the JSON Group. I add them to the SCM and icon changes from ? to A but if I try and commit them it say folder /JSON is not under SCM. Can you drag a folder into Xcode so that it AND its files get included in SCM? Anyway to stop Xcode Help from being on top all the time. I keep feeling like punching it and telling it to get out of the way! :) I dont mind it open just not in the way once I've finished. Yes I know I can Ctrl-W Sites: the main site I use to learn Obj-C are : stackoverflow.com Google code Search - tonnes of full apps on here http://www.iphonedevsdk.com/forum/iphone-sdk-development/ Apple Developers Forums (anyway to get RSS feed to these or is that blasphemy :) ) Safari - 100s of IT book though prob too many to keep up :) any others? Any site that gives simple examples for Obj-C/ UIKit The docs just show the methods but actual examples (Google code search has helped a lot here)

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• NSFetchedResultsController: using of NSManagedObjectContext during update brings to crash

  - by Kentzo

  Here is the interface of my controller class: @interface ProjectListViewController : UITableViewController <NSFetchedResultsControllerDelegate> { NSFetchedResultsController *fetchedResultsController; NSManagedObjectContext *managedObjectContext; } @end I use following code to init fetchedResultsController: if (fetchedResultsController != nil) { return fetchedResultsController; } // Create and configure a fetch request with the Project entity. NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"Project" inManagedObjectContext:managedObjectContext]; [fetchRequest setEntity:entity]; // Create the sort descriptors array. NSSortDescriptor *projectIdDescriptor = [[NSSortDescriptor alloc] initWithKey:@"projectId" ascending:YES]; NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:projectIdDescriptor, nil]; [fetchRequest setSortDescriptors:sortDescriptors]; // Create and initialize the fetch results controller. NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:managedObjectContext sectionNameKeyPath:nil cacheName:nil]; self.fetchedResultsController = aFetchedResultsController; fetchedResultsController.delegate = self; As you can see, I am using the same managedObjectContext as defined in my controller class Here is an adoption of the NSFetchedResultsControllerDelegate protocol: - (void)controllerWillChangeContent:(NSFetchedResultsController *)controller { // The fetch controller is about to start sending change notifications, so prepare the table view for updates. [self.tableView beginUpdates]; } - (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type newIndexPath:(NSIndexPath *)newIndexPath { UITableView *tableView = self.tableView; switch(type) { case NSFetchedResultsChangeInsert: [tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationFade]; break; case NSFetchedResultsChangeDelete: [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; break; case NSFetchedResultsChangeUpdate: [self _configureCell:(TDBadgedCell *)[tableView cellForRowAtIndexPath:indexPath] atIndexPath:indexPath]; break; case NSFetchedResultsChangeMove: if (newIndexPath != nil) { [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; [tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationFade]; } else { [tableView reloadSections:[NSIndexSet indexSetWithIndex:indexPath.section] withRowAnimation:UITableViewRowAnimationFade]; } break; } } - (void)controller:(NSFetchedResultsController *)controller didChangeSection:(id <NSFetchedResultsSectionInfo>)sectionInfo atIndex:(NSUInteger)sectionIndex forChangeType:(NSFetchedResultsChangeType)type { switch(type) { case NSFetchedResultsChangeInsert: [self.tableView insertSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade]; break; case NSFetchedResultsChangeDelete: [self.tableView deleteSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade]; break; } } - (void)controllerDidChangeContent:(NSFetchedResultsController *)controller { [self.tableView endUpdates]; } Inside of the _configureCell:atIndexPath: method I have following code: NSFetchRequest *issuesNumberRequest = [NSFetchRequest new]; NSEntityDescription *issueEntity = [NSEntityDescription entityForName:@"Issue" inManagedObjectContext:managedObjectContext]; [issuesNumberRequest setEntity:issueEntity]; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"projectId == %@", project.projectId]; [issuesNumberRequest setPredicate:predicate]; NSUInteger issuesNumber = [managedObjectContext countForFetchRequest:issuesNumberRequest error:nil]; [issuesNumberRequest release]; I am using the managedObjectContext again. But when I am trying to insert new Project, app crashes with following exception: Assertion failure in -[UITableView _endCellAnimationsWithContext:], /SourceCache/UIKit_Sim/UIKit-984.38/UITableView.m:774 Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid update: invalid number of rows in section 0. The number of rows contained in an existing section after the update (4) must be equal to the number of rows contained in that section before the update (4), plus or minus the number of rows inserted or deleted from that section (1 inserted, 0 deleted).' Fortunately, I've found a workaround: if I create and use separate NSManagedObjectContext inside of the _configureCell:atIndexPath: method app won't crash! I only want to know, is this behavior correct or not?

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• "didChangeSection:" NSfetchedResultsController delegate method not being called

  - by robenk

  I have a standard split view controller, with a detail view and a table view. Pressing a button in the detail view can cause the an object to change its placement in the table view's ordering. This works fine, as long as the resulting ordering change doesn't result in a section being added or removed. I.e. an object can change it's ordering in a section or switch from one section to another. Those ordering changes work correctly without problems. But, if the object tries to move to a section that doesn't exist yet, or is the last object to leave a section (therefore requiring the section its leaving to be removed), then the application crashes. NSFetchedResultsControllerDelegate has methods to handle sections being added and removed that should be called in those cases. But those delegate methods aren't being called for some reason. The code in question, is boilerplate: - (void)controllerWillChangeContent:(NSFetchedResultsController *)controller { NSLog(@"willChangeContent"); [self.tableView beginUpdates]; } - (void)controller:(NSFetchedResultsController *)controller didChangeSection:(id <NSFetchedResultsSectionInfo>)sectionInfo atIndex:(NSUInteger)sectionIndex forChangeType:(NSFetchedResultsChangeType)type { NSLog(@"didChangeSection"); switch(type) { case NSFetchedResultsChangeInsert: [self.tableView insertSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade]; break; case NSFetchedResultsChangeDelete: [self.tableView deleteSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade]; break; } } - (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type newIndexPath:(NSIndexPath *)newIndexPath { NSLog(@"didChangeObject"); UITableView *tableView = self.tableView; switch(type) { case NSFetchedResultsChangeInsert: [tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationFade]; break; case NSFetchedResultsChangeDelete: [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; break; case NSFetchedResultsChangeUpdate: [self configureCell:[tableView cellForRowAtIndexPath:indexPath] atIndexPath:indexPath]; break; case NSFetchedResultsChangeMove: [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; [tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath]withRowAnimation:UITableViewRowAnimationFade]; break; } } - (void)controllerDidChangeContent:(NSFetchedResultsController *)controller { NSLog(@"didChangeContent"); [self.tableView endUpdates]; [detailViewController.reminderView update]; } Starting the application, and then causing the last object to leave a section results in the following output: 2011-01-08 23:40:18.910 Reminders[54647:207] willChangeContent 2011-01-08 23:40:18.912 Reminders[54647:207] didChangeObject 2011-01-08 23:40:18.914 Reminders[54647:207] didChangeContent 2011-01-08 23:40:18.915 Reminders[54647:207] *** Assertion failure in -[UITableView _endCellAnimationsWithContext:], /SourceCache/UIKit_Sim/UIKit-1145.66/UITableView.m:825 2011-01-08 23:40:18.917 Reminders[54647:207] Serious application error. Exception was caught during Core Data change processing: Invalid update: invalid number of sections. The number of sections contained in the table view after the update (5) must be equal to the number of sections contained in the table view before the update (6), plus or minus the number of sections inserted or deleted (0 inserted, 0 deleted). with userInfo (null) As you can see, "willChangeContent", "didChangeObject" (moving the object in question), and "didChangeContent" were all called properly. Based on the Apple's NSFetchedResultsControllerDelegate documentation "didChangeSection" should have been called before "didChangeObject", which would have prevented the exception causing the crash. So I guess the question is how do I assure that didChangeSection gets called? Thanks in advance for any help!

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• Custom Gesture in cocos2d

  - by Lewis

  I've found a little tutorial that would be useful for my game: http://blog.mellenthin.de/archives/2012/02/13/an-one-finger-rotation-gesture-recognizer/ But I can't work out how to convert that gesture to work with cocos2d, I have found examples of pre made gestures in cocos2d, but no custom ones, is it possible? EDIT STILL HAVING PROBLEMS WITH THIS: I've added the code from Sentinel below (from SO), the Gesture and RotateGesture have both been added to my solution and are compiling. Although In the rotation class now I only see selectors, how do I set those up? As the custom gesture found in that project above looks like: header file for custom gesture: #import <Foundation/Foundation.h> #import <UIKit/UIGestureRecognizerSubclass.h> @protocol OneFingerRotationGestureRecognizerDelegate <NSObject> @optional - (void) rotation: (CGFloat) angle; - (void) finalAngle: (CGFloat) angle; @end @interface OneFingerRotationGestureRecognizer : UIGestureRecognizer { CGPoint midPoint; CGFloat innerRadius; CGFloat outerRadius; CGFloat cumulatedAngle; id <OneFingerRotationGestureRecognizerDelegate> target; } - (id) initWithMidPoint: (CGPoint) midPoint innerRadius: (CGFloat) innerRadius outerRadius: (CGFloat) outerRadius target: (id) target; - (void)reset; - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event; - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event; - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event; - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event; @end .m for custom gesture file: #include <math.h> #import "OneFingerRotationGestureRecognizer.h" @implementation OneFingerRotationGestureRecognizer // private helper functions CGFloat distanceBetweenPoints(CGPoint point1, CGPoint point2); CGFloat angleBetweenLinesInDegrees(CGPoint beginLineA, CGPoint endLineA, CGPoint beginLineB, CGPoint endLineB); - (id) initWithMidPoint: (CGPoint) _midPoint innerRadius: (CGFloat) _innerRadius outerRadius: (CGFloat) _outerRadius target: (id <OneFingerRotationGestureRecognizerDelegate>) _target { if ((self = [super initWithTarget: _target action: nil])) { midPoint = _midPoint; innerRadius = _innerRadius; outerRadius = _outerRadius; target = _target; } return self; } /** Calculates the distance between point1 and point 2. */ CGFloat distanceBetweenPoints(CGPoint point1, CGPoint point2) { CGFloat dx = point1.x - point2.x; CGFloat dy = point1.y - point2.y; return sqrt(dx*dx + dy*dy); } CGFloat angleBetweenLinesInDegrees(CGPoint beginLineA, CGPoint endLineA, CGPoint beginLineB, CGPoint endLineB) { CGFloat a = endLineA.x - beginLineA.x; CGFloat b = endLineA.y - beginLineA.y; CGFloat c = endLineB.x - beginLineB.x; CGFloat d = endLineB.y - beginLineB.y; CGFloat atanA = atan2(a, b); CGFloat atanB = atan2(c, d); // convert radiants to degrees return (atanA - atanB) * 180 / M_PI; } #pragma mark - UIGestureRecognizer implementation - (void)reset { [super reset]; cumulatedAngle = 0; } - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { [super touchesBegan:touches withEvent:event]; if ([touches count] != 1) { self.state = UIGestureRecognizerStateFailed; return; } } - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { [super touchesMoved:touches withEvent:event]; if (self.state == UIGestureRecognizerStateFailed) return; CGPoint nowPoint = [[touches anyObject] locationInView: self.view]; CGPoint prevPoint = [[touches anyObject] previousLocationInView: self.view]; // make sure the new point is within the area CGFloat distance = distanceBetweenPoints(midPoint, nowPoint); if ( innerRadius <= distance && distance <= outerRadius) { // calculate rotation angle between two points CGFloat angle = angleBetweenLinesInDegrees(midPoint, prevPoint, midPoint, nowPoint); // fix value, if the 12 o'clock position is between prevPoint and nowPoint if (angle > 180) { angle -= 360; } else if (angle < -180) { angle += 360; } // sum up single steps cumulatedAngle += angle; // call delegate if ([target respondsToSelector: @selector(rotation:)]) { [target rotation:angle]; } } else { // finger moved outside the area self.state = UIGestureRecognizerStateFailed; } } - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { [super touchesEnded:touches withEvent:event]; if (self.state == UIGestureRecognizerStatePossible) { self.state = UIGestureRecognizerStateRecognized; if ([target respondsToSelector: @selector(finalAngle:)]) { [target finalAngle:cumulatedAngle]; } } else { self.state = UIGestureRecognizerStateFailed; } cumulatedAngle = 0; } - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event { [super touchesCancelled:touches withEvent:event]; self.state = UIGestureRecognizerStateFailed; cumulatedAngle = 0; } @end Then its initialised like this: // calculate center and radius of the control CGPoint midPoint = CGPointMake(image.frame.origin.x + image.frame.size.width / 2, image.frame.origin.y + image.frame.size.height / 2); CGFloat outRadius = image.frame.size.width / 2; // outRadius / 3 is arbitrary, just choose something >> 0 to avoid strange // effects when touching the control near of it's center gestureRecognizer = [[OneFingerRotationGestureRecognizer alloc] initWithMidPoint: midPoint innerRadius: outRadius / 3 outerRadius: outRadius target: self]; [self.view addGestureRecognizer: gestureRecognizer]; The selector below is also in the same file where the initialisation of the gestureRecogonizer: - (void) rotation: (CGFloat) angle { // calculate rotation angle imageAngle += angle; if (imageAngle > 360) imageAngle -= 360; else if (imageAngle < -360) imageAngle += 360; // rotate image and update text field image.transform = CGAffineTransformMakeRotation(imageAngle * M_PI / 180); [self updateTextDisplay]; } I can't seem to get this working in the RotateGesture class can anyone help me please I've been stuck on this for days now. SECOND EDIT: Here is the users code from SO that was suggested to me: Here is projec on GitHub: SFGestureRecognizers It uses builded in iOS UIGestureRecognizer, and don't needs to be integrated into cocos2d sources. Using it, You can make any gestures, just like you could, if you whould work with UIGestureRecognizer. For example: I made a base class Gesture, and subclassed it for any new gesture: //Gesture.h @interface Gesture : NSObject <UIGestureRecognizerDelegate> { UIGestureRecognizer *gestureRecognizer; id delegate; SEL preSolveSelector; SEL possibleSelector; SEL beganSelector; SEL changedSelector; SEL endedSelector; SEL cancelledSelector; SEL failedSelector; BOOL preSolveAvailable; CCNode *owner; } - (id)init; - (void)addGestureRecognizerToNode:(CCNode*)node; - (void)removeGestureRecognizerFromNode:(CCNode*)node; -(void)recognizer:(UIGestureRecognizer*)recognizer; @end //Gesture.m #import "Gesture.h" @implementation Gesture - (id)init { if (!(self = [super init])) return self; preSolveAvailable = YES; return self; } - (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer { return YES; } - (BOOL)gestureRecognizer:(UIGestureRecognizer *)recognizer shouldReceiveTouch:(UITouch *)touch { //! For swipe gesture recognizer we want it to be executed only if it occurs on the main layer, not any of the subnodes ( main layer is higher in hierarchy than children so it will be receiving touch by default ) if ([recognizer class] == [UISwipeGestureRecognizer class]) { CGPoint pt = [touch locationInView:touch.view]; pt = [[CCDirector sharedDirector] convertToGL:pt]; for (CCNode *child in owner.children) { if ([child isNodeInTreeTouched:pt]) { return NO; } } } return YES; } - (void)addGestureRecognizerToNode:(CCNode*)node { [node addGestureRecognizer:gestureRecognizer]; owner = node; } - (void)removeGestureRecognizerFromNode:(CCNode*)node { [node removeGestureRecognizer:gestureRecognizer]; } #pragma mark - Private methods -(void)recognizer:(UIGestureRecognizer*)recognizer { CCNode *node = recognizer.node; if (preSolveSelector && preSolveAvailable) { preSolveAvailable = NO; [delegate performSelector:preSolveSelector withObject:recognizer withObject:node]; } UIGestureRecognizerState state = [recognizer state]; if (state == UIGestureRecognizerStatePossible && possibleSelector) { [delegate performSelector:possibleSelector withObject:recognizer withObject:node]; } else if (state == UIGestureRecognizerStateBegan && beganSelector) [delegate performSelector:beganSelector withObject:recognizer withObject:node]; else if (state == UIGestureRecognizerStateChanged && changedSelector) [delegate performSelector:changedSelector withObject:recognizer withObject:node]; else if (state == UIGestureRecognizerStateEnded && endedSelector) { preSolveAvailable = YES; [delegate performSelector:endedSelector withObject:recognizer withObject:node]; } else if (state == UIGestureRecognizerStateCancelled && cancelledSelector) { preSolveAvailable = YES; [delegate performSelector:cancelledSelector withObject:recognizer withObject:node]; } else if (state == UIGestureRecognizerStateFailed && failedSelector) { preSolveAvailable = YES; [delegate performSelector:failedSelector withObject:recognizer withObject:node]; } } @end Subclass example: //RotateGesture.h #import "Gesture.h" @interface RotateGesture : Gesture - (id)initWithTarget:(id)target preSolveSelector:(SEL)preSolve possibleSelector:(SEL)possible beganSelector:(SEL)began changedSelector:(SEL)changed endedSelector:(SEL)ended cancelledSelector:(SEL)cancelled failedSelector:(SEL)failed; @end //RotateGesture.m #import "RotateGesture.h" @implementation RotateGesture - (id)initWithTarget:(id)target preSolveSelector:(SEL)preSolve possibleSelector:(SEL)possible beganSelector:(SEL)began changedSelector:(SEL)changed endedSelector:(SEL)ended cancelledSelector:(SEL)cancelled failedSelector:(SEL)failed { if (!(self = [super init])) return self; preSolveSelector = preSolve; delegate = target; possibleSelector = possible; beganSelector = began; changedSelector = changed; endedSelector = ended; cancelledSelector = cancelled; failedSelector = failed; gestureRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(recognizer:)]; gestureRecognizer.delegate = self; return self; } @end Use example: - (void)addRotateGesture { RotateGesture *rotateRecognizer = [[RotateGesture alloc] initWithTarget:self preSolveSelector:@selector(rotateGesturePreSolveWithRecognizer:node:) possibleSelector:nil beganSelector:@selector(rotateGestureStateBeganWithRecognizer:node:) changedSelector:@selector(rotateGestureStateChangedWithRecognizer:node:) endedSelector:@selector(rotateGestureStateEndedWithRecognizer:node:) cancelledSelector:@selector(rotateGestureStateCancelledWithRecognizer:node:) failedSelector:@selector(rotateGestureStateFailedWithRecognizer:node:)]; [rotateRecognizer addGestureRecognizerToNode:movableAreaSprite]; } I dont understand how to implement the custom gesture code at the start of this post into the rotateGesture class which is a subclass of the gesture class written by the SO user. Any ideas please? When I get 6 more rep I'll add a bounty to this.

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• Is this crash in libdispatch caused by Reachability?

  - by esilver

  Can anyone tell me if this crashing stack appears to be caused by Reachability? I am running apple's latest implementation of Reachability, downloadable at https://developer.apple.com/library/ios/samplecode/reachability/Introduction/Intro.html I have an app where ARC is not enabled by default (it is a legacy app) but I enable it on a per-file basis. I have enabled -fobjc-arc for Reachability.m When I look at these threads, my code is nowhere to be found. I see some activity happening because of a WebHTMLView (probably the ad network view code currently on screen; it's not mine). On Thread 10, I see a SCNetworkReachabilityDeallocate, then a dispatch_semaphore_wait_slow, and the crash happens on Thread 14 in libdispatch. Do you think this crash is being caused by that Reachability code, and have I erred in using -fobjc-arc with Reachability.m? Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Subtype: KERN_INVALID_ADDRESS at 0x2000000c Triggered by Thread: 14 Thread 0: 0 libsystem_kernel.dylib 0x39cafa84 mach_msg_trap + 20 1 libsystem_kernel.dylib 0x39caf87c mach_msg + 36 2 CoreFoundation 0x2f3e255c __CFRunLoopServiceMachPort + 152 3 CoreFoundation 0x2f3e0cc2 __CFRunLoopRun + 858 4 CoreFoundation 0x2f34b53c CFRunLoopRunSpecific + 520 5 CoreFoundation 0x2f34b31e CFRunLoopRunInMode + 102 6 GraphicsServices 0x340822e6 GSEventRunModal + 134 7 UIKit 0x31c021e0 UIApplicationMain + 1132 8 MyApp 0x00053ad4 main (main.m:33) 9 libdyld.dylib 0x39c0bab4 start + 0 Thread 1: 0 libsystem_kernel.dylib 0x39caf838 kevent64 + 24 1 libdispatch.dylib 0x39bfe0d0 _dispatch_mgr_invoke + 228 2 libdispatch.dylib 0x39bf863e _dispatch_mgr_thread + 34 Thread 2 name: com.apple.NSURLConnectionLoader Thread 2: 0 libsystem_kernel.dylib 0x39cb0910 close + 8 1 CoreFoundation 0x2f370ef6 CFSocketInvalidate + 434 2 CFNetwork 0x2f0122a2 Schedulables::_SchedulablesInvalidateApplierFunction(void const*, void*) + 14 3 CoreFoundation 0x2f34af6e CFArrayApplyFunction + 34 4 CFNetwork 0x2f011a94 SocketStream::close(void const*) + 280 5 CFNetwork 0x2f01194e CoreStreamBase::_streamInterface_Close() + 46 6 CFNetwork 0x2f030286 HTTPReadFilter::_streamImpl_Close() + 66 7 CFNetwork 0x2f01194e CoreStreamBase::_streamInterface_Close() + 46 8 CFNetwork 0x2f0301c6 NetConnection::shutdownConnectionStreams() + 98 9 CFNetwork 0x2f0309c8 NetConnection::closeStreamsIfPossibleOrSignalThatThatNeedsToBeDonePrettyPlease() + 56 10 CFNetwork 0x2f030d12 HTTPConnectionCacheEntry::removeUnauthConnection(NetConnection*) + 182 11 CoreFoundation 0x2f34af6e CFArrayApplyFunction + 34 12 CFNetwork 0x2f075678 HTTPConnectionCacheEntry::purgeIdleConnections(double, double) + 256 13 CFNetwork 0x2f030ad4 HTTPConnectionCache::performIdleSweep() + 156 14 CFNetwork 0x2f073b42 HTTPConnectionCache::timeoutIdleCellConnections() + 18 15 CFNetwork 0x2f0b3394 ___ZNK17CoreSchedulingSet13_performAsyncEPKcU13block_pointerFvvE_block_invoke + 16 16 CoreFoundation 0x2f34af6e CFArrayApplyFunction + 34 17 CFNetwork 0x2f019f10 RunloopBlockContext::perform() + 160 18 CFNetwork 0x2f019de2 MultiplexerSource::perform() + 218 19 CFNetwork 0x2f019c70 MultiplexerSource::_perform(void*) + 44 20 CoreFoundation 0x2f3e2f24 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 12 21 CoreFoundation 0x2f3e23ea __CFRunLoopDoSources0 + 202 22 CoreFoundation 0x2f3e0bda __CFRunLoopRun + 626 23 CoreFoundation 0x2f34b53c CFRunLoopRunSpecific + 520 24 CoreFoundation 0x2f34b31e CFRunLoopRunInMode + 102 25 Foundation 0x2fd8664c +[NSURLConnection(Loader) _resourceLoadLoop:] + 316 26 Foundation 0x2fdfbdc2 __NSThread__main__ + 1058 27 libsystem_pthread.dylib 0x39d28c5a _pthread_body + 138 28 libsystem_pthread.dylib 0x39d28bca _pthread_start + 98 29 libsystem_pthread.dylib 0x39d26ccc thread_start + 4 Thread 3 name: WebThread Thread 3: 0 CoreGraphics 0x2f49163c CGRectIsEmpty + 0 1 WebCore 0x37291700 -[WAKView setNeedsDisplayInRect:] + 76 2 WebKit 0x37cad22a -[WebHTMLView setNeedsDisplayInRect:] + 214 3 WebCore 0x372915cc WebCore::ScrollView::platformRepaintContentRectangle(WebCore::IntRect const&, bool) + 148 4 WebCore 0x37291412 WebCore::ScrollView::repaintContentRectangle(WebCore::IntRect const&, bool) + 98 5 WebCore 0x37291272 WebCore::FrameView::doDeferredRepaints() + 90 6 WebCore 0x372dc96c WebCore::FrameView::layout(bool) + 1748 7 WebCore 0x3721fb94 WebCore::ThreadTimers::sharedTimerFiredInternal() + 132 8 WebCore 0x3721fae6 WebCore::timerFired(__CFRunLoopTimer*, void*) + 22 9 CoreFoundation 0x2f3e2e84 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 12 10 CoreFoundation 0x2f3e2a9e __CFRunLoopDoTimer + 790 11 CoreFoundation 0x2f3e0e26 __CFRunLoopRun + 1214 12 CoreFoundation 0x2f34b53c CFRunLoopRunSpecific + 520 13 CoreFoundation 0x2f34b31e CFRunLoopRunInMode + 102 14 WebCore 0x372ae7d8 RunWebThread(void*) + 416 15 libsystem_pthread.dylib 0x39d28c5a _pthread_body + 138 16 libsystem_pthread.dylib 0x39d28bca _pthread_start + 98 17 libsystem_pthread.dylib 0x39d26ccc thread_start + 4 Thread 4: 0 libsystem_kernel.dylib 0x39cafa84 mach_msg_trap + 20 1 libsystem_kernel.dylib 0x39caf87c mach_msg + 36 2 CoreFoundation 0x2f3e255c __CFRunLoopServiceMachPort + 152 3 CoreFoundation 0x2f3e0c7c __CFRunLoopRun + 788 4 CoreFoundation 0x2f34b53c CFRunLoopRunSpecific + 520 5 CoreFoundation 0x2f34b31e CFRunLoopRunInMode + 102 6 libAVFAudio.dylib 0x2e3295ae GenericRunLoopThread::Entry(void*) + 126 7 libAVFAudio.dylib 0x2e31dbf4 CAPThread::Entry(CAPThread*) + 176 8 libsystem_pthread.dylib 0x39d28c5a _pthread_body + 138 9 libsystem_pthread.dylib 0x39d28bca _pthread_start + 98 10 libsystem_pthread.dylib 0x39d26ccc thread_start + 4 Thread 5 name: JavaScriptCore::BlockFree Thread 5: 0 libsystem_kernel.dylib 0x39cc1f38 __psynch_cvwait + 24 1 libsystem_pthread.dylib 0x39d28262 _pthread_cond_wait + 538 2 libsystem_pthread.dylib 0x39d2903c pthread_cond_wait + 36 3 JavaScriptCore 0x3036f408 JSC::BlockAllocator::blockFreeingThreadMain() + 204 4 JavaScriptCore 0x3036ca70 WTF::wtfThreadEntryPoint(void*) + 12 5 libsystem_pthread.dylib 0x39d28c5a _pthread_body + 138 6 libsystem_pthread.dylib 0x39d28bca _pthread_start + 98 7 libsystem_pthread.dylib 0x39d26ccc thread_start + 4 Thread 6 name: JavaScriptCore::Marking Thread 6: 0 libsystem_kernel.dylib 0x39cc1f38 __psynch_cvwait + 24 1 libsystem_pthread.dylib 0x39d28262 _pthread_cond_wait + 538 2 libsystem_pthread.dylib 0x39d2903c pthread_cond_wait + 36 3 JavaScriptCore 0x3050daf2 JSC::GCThread::waitForNextPhase() + 74 4 JavaScriptCore 0x3050db4c JSC::GCThread::gcThreadMain() + 48 5 JavaScriptCore 0x3036ca70 WTF::wtfThreadEntryPoint(void*) + 12 6 libsystem_pthread.dylib 0x39d28c5a _pthread_body + 138 7 libsystem_pthread.dylib 0x39d28bca _pthread_start + 98 8 libsystem_pthread.dylib 0x39d26ccc thread_start + 4 Thread 7 name: com.apple.CFSocket.private Thread 7: 0 libsystem_kernel.dylib 0x39cc2440 select$DARWIN_EXTSN + 20 1 CoreFoundation 0x2f3e645e __CFSocketManager + 482 2 libsystem_pthread.dylib 0x39d28c5a _pthread_body + 138 3 libsystem_pthread.dylib 0x39d28bca _pthread_start + 98 4 libsystem_pthread.dylib 0x39d26ccc thread_start + 4 Thread 8 name: AFNetworking Thread 8: 0 libsystem_kernel.dylib 0x39cafa84 mach_msg_trap + 20 1 libsystem_kernel.dylib 0x39caf87c mach_msg + 36 2 CoreFoundation 0x2f3e255c __CFRunLoopServiceMachPort + 152 3 CoreFoundation 0x2f3e0c7c __CFRunLoopRun + 788 4 CoreFoundation 0x2f34b53c CFRunLoopRunSpecific + 520 5 CoreFoundation 0x2f34b31e CFRunLoopRunInMode + 102 6 Foundation 0x2fd39822 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 250 7 Foundation 0x2fd8a664 -[NSRunLoop(NSRunLoop) run] + 76 8 MyApp 0x002c33d0 +[AFURLConnectionOperation networkRequestThreadEntryPoint:] (AFURLConnectionOperation.m:184) 9 Foundation 0x2fdfbdc2 __NSThread__main__ + 1058 10 libsystem_pthread.dylib 0x39d28c5a _pthread_body + 138 11 libsystem_pthread.dylib 0x39d28bca _pthread_start + 98 12 libsystem_pthread.dylib 0x39d26ccc thread_start + 4 Thread 9 name: WebCore: CFNetwork Loader Thread 9: 0 libsystem_kernel.dylib 0x39cafa84 mach_msg_trap + 20 1 libsystem_kernel.dylib 0x39caf87c mach_msg + 36 2 CoreFoundation 0x2f3e255c __CFRunLoopServiceMachPort + 152 3 CoreFoundation 0x2f3e0c7c __CFRunLoopRun + 788 4 CoreFoundation 0x2f34b53c CFRunLoopRunSpecific + 520 5 CoreFoundation 0x2f34b31e CFRunLoopRunInMode + 102 6 WebCore 0x372f7872 WebCore::runLoaderThread(void*) + 250 7 JavaScriptCore 0x3036ca70 WTF::wtfThreadEntryPoint(void*) + 12 8 libsystem_pthread.dylib 0x39d28c5a _pthread_body + 138 9 libsystem_pthread.dylib 0x39d28bca _pthread_start + 98 10 libsystem_pthread.dylib 0x39d26ccc thread_start + 4 Thread 10: 0 libsystem_kernel.dylib 0x39cafad4 semaphore_wait_trap + 8 1 libdispatch.dylib 0x39bfcdec _dispatch_semaphore_wait_slow + 172 2 libxpc.dylib 0x39d370d6 xpc_connection_send_message_with_reply_sync + 150 3 SystemConfiguration 0x31b77362 _reach_server_target_remove + 90 4 SystemConfiguration 0x31b772d2 __SCNetworkReachabilityServer_targetRemove + 38 5 SystemConfiguration 0x31b5e318 __SCNetworkReachabilityDeallocate + 92 6 CoreFoundation 0x2f347efc CFRelease + 464 7 libdispatch.dylib 0x39bfc7e0 _dispatch_root_queue_drain + 220 8 libdispatch.dylib 0x39bfc9cc _dispatch_worker_thread2 + 52 9 libsystem_pthread.dylib 0x39d26dfc _pthread_wqthread + 296 10 libsystem_pthread.dylib 0x39d26cc0 start_wqthread + 4 Thread 11: 0 libsystem_kernel.dylib 0x39cc2c7c __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x39d26e06 _pthread_wqthread + 306 2 libsystem_pthread.dylib 0x39d26cc0 start_wqthread + 4 Thread 12: 0 libsystem_kernel.dylib 0x39cc2c7c __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x39d26e06 _pthread_wqthread + 306 2 libsystem_pthread.dylib 0x39d26cc0 start_wqthread + 4 Thread 13: 0 libsystem_kernel.dylib 0x39cafa84 mach_msg_trap + 20 1 libsystem_kernel.dylib 0x39caf87c mach_msg + 36 2 CoreFoundation 0x2f3e255c __CFRunLoopServiceMachPort + 152 3 CoreFoundation 0x2f3e0c7c __CFRunLoopRun + 788 4 CoreFoundation 0x2f34b53c CFRunLoopRunSpecific + 520 5 CoreFoundation 0x2f38f1a6 CFRunLoopRun + 94 6 CoreMotion 0x2fa03394 ___lldb_unnamed_function1407$$CoreMotion + 724 7 libsystem_pthread.dylib 0x39d28c5a _pthread_body + 138 8 libsystem_pthread.dylib 0x39d28bca _pthread_start + 98 9 libsystem_pthread.dylib 0x39d26ccc thread_start + 4 Thread 14 Crashed: 0 libobjc.A.dylib 0x3970db66 objc_msgSend + 6 1 CoreFoundation 0x2f347f58 CFRelease + 556 2 libdispatch.dylib 0x39bf7100 _dispatch_call_block_and_release + 8 3 libdispatch.dylib 0x39bfbe72 _dispatch_queue_drain + 370 4 libdispatch.dylib 0x39bf8f96 _dispatch_queue_invoke + 38 5 libdispatch.dylib 0x39bfc74e _dispatch_root_queue_drain + 74 6 libdispatch.dylib 0x39bfc9cc _dispatch_worker_thread2 + 52 7 libsystem_pthread.dylib 0x39d26dfc _pthread_wqthread + 296 8 libsystem_pthread.dylib 0x39d26cc0 start_wqthread + 4

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• Why is UITableView not reloading (even on the main thread)?

  - by radesix

  I have two programs that basically do the same thing. They read an XML feed and parse the elements. The design of both programs is to use an asynchronous NSURLConnection to get the data then to spawn a new thread to handle the parsing. As batches of 5 items are parsed it calls back to the main thread to reload the UITableView. My issue is it works fine in one program, but not the other. I know that the parsing is actually occuring on the background thread and I know that [tableView reloadData] is executing on the main thread; however, it doesn't reload the table until all parsing is complete. I'm stumped. As far as I can tell... both programs are structured exactly the same way. Here is some code from the app that isn't working correctly. - (void)startConnectionWithURL:(NSString *)feedURL feedList:(NSMutableArray *)list { self.feedList = list; // Use NSURLConnection to asynchronously download the data. This means the main thread will not be blocked - the // application will remain responsive to the user. // // IMPORTANT! The main thread of the application should never be blocked! Also, avoid synchronous network access on any thread. // NSURLRequest *feedURLRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:feedURL]]; self.bloggerFeedConnection = [[[NSURLConnection alloc] initWithRequest:feedURLRequest delegate:self] autorelease]; // Test the validity of the connection object. The most likely reason for the connection object to be nil is a malformed // URL, which is a programmatic error easily detected during development. If the URL is more dynamic, then you should // implement a more flexible validation technique, and be able to both recover from errors and communicate problems // to the user in an unobtrusive manner. NSAssert(self.bloggerFeedConnection != nil, @"Failure to create URL connection."); // Start the status bar network activity indicator. We'll turn it off when the connection finishes or experiences an error. [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; } - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { self.bloggerData = [NSMutableData data]; } - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { [bloggerData appendData:data]; } - (void)connectionDidFinishLoading:(NSURLConnection *)connection { self.bloggerFeedConnection = nil; [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; // Spawn a thread to fetch the link data so that the UI is not blocked while the application parses the XML data. // // IMPORTANT! - Don't access UIKit objects on secondary threads. // [NSThread detachNewThreadSelector:@selector(parseFeedData:) toTarget:self withObject:bloggerData]; // farkData will be retained by the thread until parseFarkData: has finished executing, so we no longer need // a reference to it in the main thread. self.bloggerData = nil; } If you read this from the top down you can see when the NSURLConnection is finished I detach a new thread and call parseFeedData. - (void)parseFeedData:(NSData *)data { // You must create a autorelease pool for all secondary threads. NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; self.currentParseBatch = [NSMutableArray array]; self.currentParsedCharacterData = [NSMutableString string]; self.feedList = [NSMutableArray array]; // // It's also possible to have NSXMLParser download the data, by passing it a URL, but this is not desirable // because it gives less control over the network, particularly in responding to connection errors. // NSXMLParser *parser = [[NSXMLParser alloc] initWithData:data]; [parser setDelegate:self]; [parser parse]; // depending on the total number of links parsed, the last batch might not have been a "full" batch, and thus // not been part of the regular batch transfer. So, we check the count of the array and, if necessary, send it to the main thread. if ([self.currentParseBatch count] > 0) { [self performSelectorOnMainThread:@selector(addLinksToList:) withObject:self.currentParseBatch waitUntilDone:NO]; } self.currentParseBatch = nil; self.currentParsedCharacterData = nil; [parser release]; [pool release]; } In the did end element delegate I check to see that 5 items have been parsed before calling the main thread to perform the update. - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName { if ([elementName isEqualToString:kItemElementName]) { [self.currentParseBatch addObject:self.currentItem]; parsedItemsCounter++; if (parsedItemsCounter % kSizeOfItemBatch == 0) { [self performSelectorOnMainThread:@selector(addLinksToList:) withObject:self.currentParseBatch waitUntilDone:NO]; self.currentParseBatch = [NSMutableArray array]; } } // Stop accumulating parsed character data. We won't start again until specific elements begin. accumulatingParsedCharacterData = NO; } - (void)addLinksToList:(NSMutableArray *)links { [self.feedList addObjectsFromArray:links]; // The table needs to be reloaded to reflect the new content of the list. if (self.viewDelegate != nil && [self.viewDelegate respondsToSelector:@selector(parser:didParseBatch:)]) { [self.viewDelegate parser:self didParseBatch:links]; } } Finally, the UIViewController delegate: - (void)parser:(XMLFeedParser *)parser didParseBatch:(NSMutableArray *)parsedBatch { NSLog(@"parser:didParseBatch:"); [self.selectedBlogger.feedList addObjectsFromArray:parsedBatch]; [self.tableView reloadData]; } If I write to the log when my view controller delegate fires to reload the table and when cellForRowAtIndexPath fires as it's rebuilding the table then the log looks something like this: parser:didParseBatch: parser:didParseBatch: tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath parser:didParseBatch: parser:didParseBatch: parser:didParseBatch: tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath parser:didParseBatch: tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath parser:didParseBatch: parser:didParseBatch: parser:didParseBatch: parser:didParseBatch: tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath Clearly, the tableView is not reloading when I tell it to every time. The log from the app that works correctly looks like this: parser:didParseBatch: tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath parser:didParseBatch: tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath parser:didParseBatch: tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath parser:didParseBatch: tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath parser:didParseBatch: tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath

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