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• What is the best way to move a UIToolbar?

  - by Ferdinand Rios

  Here is an interesting problem. On the iPhone, I have a view set up that has a toolbar on the bottom of the screen. I am currently trying to make this a universal app so that it runs on iPad as well. I would like the toolbar to be at the top of the iPad screen, so in the viewDidLoad method of the specific viewController I have the following code. if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) { //move the toolbar to the top of the page and move the webview down by the height of the toolbar CGRect toolBarFrame = self.aToolBar.frame; CGRect webFrame = self.aWebView.frame; webFrame.origin.y = toolBarFrame.size.height; [self.aWebView setFrame:webFrame]; toolBarFrame.origin.y = 0; [self.aToolBar setFrame:toolBarFrame]; [Utils errorString:[NSString stringWithFormat:@"origen: x=%f y=%f", self.aToolBar.frame.origin.x, self.aToolBar.frame.origin.y]]; [Utils errorString:[NSString stringWithFormat:@"origen: x=%f y=%f", self.aWebView.frame.origin.x, self.aWebView.frame.origin.y]]; } The problem I am having is that the webView moves down fine, but the toolbar only moves up to about what seems to be the height of a iPhone screen. The call to errorString tells me that the webView's origin is at 0,44 (where it should be) and that the toolbar's origin is at 0,0, but it is actually somewhere in the middle of the screen! Anybody have a clue what is going on here?

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• TableView Cells unresponsive

  - by John Donovan

  I have a TableView and I wish to be able to press several cells one after the other and have messages appear. At the moment the cells are often unresponsive. I found some coed for a similar problem someone was kind enough to post, however, although he claimed it worked 100% it doesn't work for me. The app won't even build. Here's the code: -(UIView*) hitTest:(CGPoint)point withEvent:(UIEvent*)event { // check to see if the hit is in this table view if ([self pointInside:point withEvent:event]) { UITableViewCell* newCell = nil; // hit is in this table view, find out // which cell it is in (if any) for (UITableViewCell* aCell in self.visibleCells) { if ([aCell pointInside:[self convertPoint:point toView:aCell] withEvent:nil]) { newCell = aCell; break; } } // if it touched a different cell, tell the previous cell to resign // this gives it a chance to hide the keyboard or date picker or whatever if (newCell != activeCell) { [activeCell resignFirstResponder]; self.activeCell = newCell; // may be nil } } // return the super's hitTest result return [super hitTest:point withEvent:event]; } With this code I get this warning: that my viewController may not respond to pointsInside:withEvent (it's a TableViewController). I also get some faults: request for member 'visibleCells' in something not a structure or a union. incompatible type for argument 1 of pointInsideWithEvent, expression does not have a valid object type and similar. I must admit I'm not so good at reading other people's code but I was wondering whether the problems here are obvious and if so if anyone could give me a pointer it would be greatly appreciated.

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• How to remove all views in region in CompositeWPF/Silverlight

  - by Dan

  Hi. I want remove all views from my region in Composite. I'm using Silverlight 4.0. And unfortunately, this code crashes with OutOfRangeException inside Composite. List<object> views = new List<object>(_regionManager.Regions["NavigationRegion"].Views); foreach (object view in views) { _regionManager.Regions["NavigationRegion"].Remove(view); } This is my callstack: [External Code] Microsoft.Practices.Composite.Presentation!Microsoft.Practices.Composite.Presentation.Regions.ViewsCollection.OnCollectionChanged(System.Collections.Specialized.NotifyCollectionChangedEventArgs e = {System.Collections.Specialized.NotifyCollectionChangedEventArgs}) Line 102 + 0x24 bytes C# Microsoft.Practices.Composite.Presentation!Microsoft.Practices.Composite.Presentation.Regions.ViewsCollection.RemoveAndNotify(System.Collections.IList items = Count = 1) Line 45 + 0x2b bytes C# Microsoft.Practices.Composite.Presentation!Microsoft.Practices.Composite.Presentation.Regions.ViewsCollection.UnderlyingCollection_CollectionChanged(object sender = Count = 0, System.Collections.Specialized.NotifyCollectionChangedEventArgs e = {System.Collections.Specialized.NotifyCollectionChangedEventArgs}) Line 153 + 0xb bytes C# [External Code] Microsoft.Practices.Composite.Presentation!Microsoft.Practices.Composite.Presentation.Regions.Region.Remove(object view = {Kite.MyApp.SlUI.NavigationRegion.NavigationRegionView}) Line 230 + 0x1b bytes C# MyApp.SlUI!Kite.MyApp.SlUI.Components.ViewController.linksRegion_LanguageChanged(object sender = {Kite.MyApp.SlUI.Controls.LinksUserControl}, Kite.MyApp.SlUI.Common.EventArgs<string> e = {Kite.MyApp.SlUI.Common.EventArgs<string>}) Line 77 + 0x2d bytes C# MyApp.SlUI!Kite.MyApp.SlUI.Controls.LinksUserControl.OnLanguageChanged(string newLanguage = "en-GB") Line 37 + 0x32 bytes C# MyApp.SlUI!Kite.MyApp.SlUI.Controls.LinksUserControl.ComboBox_SelectionChanged(object sender = {System.Windows.Controls.ComboBox}, System.Windows.Controls.SelectionChangedEventArgs e = {System.Windows.Controls.SelectionChangedEventArgs}) Line 31 + 0xb bytes C# [External Code] What did I wrong? Hoping for you help :). Thank you.

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• iPhone Landscape FAQ and Solutions

  - by Johannes Rudolph

  There has been a lot of confusion and a set of corresponding set of questions here on SO how iPhone applications with proper handling for Landscape/Portrait mode autorotation can be implemented. It is especially difficult to implement such an application when starting in landscape mode is desired. The most common observed effect are scrambled layouts and areas of the screen where touches are no longer recognized. A simple search for questions tagged iphone and landscape reveals these issues, which occur under certain scenarios: Landscape only iPhone app with multiple nibs: App started in Landscape mode, view from first nib is rendered fine, everything view loaded from a different nib is not displayed correctly. Iphone Landscape mode switching to Portraite mode on loading new controller: Self explanatory iPhone: In landscape-only, after first addSubview, UITableViewController doesn’t rotate properly: Same issue as above. iPhone Landscape-Only Utility-Template Application: Layout errors, controller does not seem to recognize the view should be rotated but displays a clipped portrait view in landscape mode, causing half of the screen to stay blank. presentModalViewController in landscape after portrait viewController: Modal views are not correctly rendered either. A set of different solutions have been presented, some of them including completely custom animation via CoreGraphics, while others build on the observation that the first view controller loaded from the main nib is always displayed correct. I have spent a significant amount of time investigating this issue and finally found a solution that is not only a partial solution but should work under all these circumstances. It is my intend with this CW post to provide sort of a FAQ for others having issues with UIViewControllers in Landscape mode. Please provide feedback and help improve the quality of this Post by incorporating any related observations. Feel free to edit and post other/better answers if you know of any.

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• iPhone OpenGL Splash Screen? How?

  - by Kyle

  My app is based pretty much on the EAGLView in the SDK. It doesn't incorporate a ViewController. Rather it simply inits GL and starts painting immediately.. Currently, my app will load a very small PNG and displays it as quickly as possible. On a 3GS this is rather instant, but on a 3G it can take about 2 seconds. In the latter case of the 3G, the user is looking at a black screen for that time. Is this behavior allowed by Apple? Is there any way to alter this SDK example so that it makes use of 'default.png'? It doesn't seem so straight forward to me. I want my user to see an image as quickly as possible, and I also don't want to be rejected for such a little quirk like this as well. In the guidelines, they encourage you to use default.png for standard applications to show a sort of mockup of the interface while it actually loads. I want to initialize OpenGL, and ALSO display this. This default.png is loaded before the app screen launches. This is EXACLTY what I want to make use of. Any help is appreciated. Thanks!

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• iphone webview dynamic font support

  - by Kiran

  Friends, I am trying to build a simple iphone application to view a local webpage that uses dynamic fonts. The url is www.eenadu.net. I have just a single view based application and inserted a webview into the view and implementing the webviewdelegate in viewcontroller. The site uses ttf/eot fonts that are dynamically downloadable by browser from http://www.eenadu.net/eenadu.ttf or http://www.eenadu.net/EENADU0.eot. Here is what I am doing in the code by doing some research: Code: ( void ) loadFont { NSString *fontPath = [[NSBundle mainBundle] pathForResource:@"eenadu" ofType:@"ttf"]; CGDataProviderRef fontDataProvider = CGDataProviderCreateWithFilename([fontPath UTF8String]); // Create the font with the data provider, then release the data provider. customFont = CGFontCreateWithDataProvider(fontDataProvider); CGDataProviderRelease(fontDataProvider); fontPath = [[NSBundle mainBundle] pathForResource:@"eenadu" ofType:@"eot"]; fontDataProvider = CGDataProviderCreateWithFilename([fontPath UTF8String]); // Create the font with the data provider, then release the data provider. customFont = CGFontCreateWithDataProvider(fontDataProvider); CGDataProviderRelease(fontDataProvider); } (void) viewDidLoad { [super viewDidLoad]; [self loadFont]; [webView setBackgroundColor:[UIColor whiteColor]]; NSString *urlAddress = @"http://www.eenadu.net/"; NSURL *url = [NSURL URLWithString:urlAddress]; NSURLRequest *requestObj = [NSURLRequest requestWithURL:url]; [webView loadRequest:requestObj]; } I see that the page loads however doesn't display the font. Please help. Also, For loadFont, I have included the fonts in the build with right names and took care of the case as well.

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• Updating UIView subclass contents

  - by Brett

  Hi; I am trying to update a UIView subclass to draw individual pixels (rectangles) after calculating if they are in the mandelbrot set. I am using the following code but am getting a blank screen: //drawingView.h ... -(void)drawRect:(CGRect)rect{ CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetRGBFillColor(context, r, g, b, 1); CGContextSetRGBStrokeColor(context, r, g, b, 1); CGRect arect = CGRectMake(x,y,1,1); CGContextFillRect(context, arect); } ... //viewController.m ... - (void)viewDidLoad { [drawingView setX:10]; [drawingView setY:10]; [drawingView setR:0.0]; [drawingView setG:0.0]; [drawingView setB:0.0]; [super viewDidLoad]; [drawingView setNeedsDisplay]; } Once I figure out how to display one pixel, I'd like to know how to go about updating the view by adding another pixel (once calculated). Once all the variables change, how do I keep the current view as is but add another pixel? Thanks, Brett

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• Saving data - does work on Simulator, not on Device

  - by Peter Hajas

  I use NSData to persist an image in my application. I save the image like so (in my App Delegate): - (void)applicationWillTerminate:(UIApplication *)application { NSLog(@"Saving data"); NSData *data = UIImagePNGRepresentation([[viewController.myViewController myImage]image]); //Write the file out! NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *path_to_file = [documentsDirectory stringByAppendingString:@"lastimage.png"]; [data writeToFile:path_to_file atomically:YES]; NSLog(@"Data saved."); } and then I load it back like so (in my view controller, under viewDidLoad): NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *path_to_file = [documentsDirectory stringByAppendingString:@"lastimage.png"]; if([[NSFileManager defaultManager] fileExistsAtPath:path_to_file]) { NSLog(@"Found saved file, loading in image"); NSData *data = [NSData dataWithContentsOfFile:path_to_file]; UIImage *temp = [[UIImage alloc] initWithData:data]; myViewController.myImage.image = temp; NSLog(@"Finished loading in image"); } This code works every time on the simulator, but on the device, it can never seem to load back in the image. I'm pretty sure that it saves out, but I have no view of the filesystem. Am I doing something weird? Does the simulator have a different way to access its directories than the device? Thanks!

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• Loading animation Memory leak

  - by Ayaz Alavi

  Hi, I have written network class that is managing all network calls for my application. There are two methods showLoadingAnimationView and hideLoadingAnimationView that will show UIActivityIndicatorView in a view over my current viewcontroller with fade background. I am getting memory leaks somewhere on these two methods. Here is the code -(void)showLoadingAnimationView { textmeAppDelegate *textme = (textmeAppDelegate *)[[UIApplication sharedApplication] delegate]; [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES]; if(wrapperLoading != nil) { [wrapperLoading release]; } wrapperLoading = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, 320.0, 480.0)]; wrapperLoading.backgroundColor = [UIColor clearColor]; wrapperLoading.alpha = 0.8; UIView *_loadingBG = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, 320.0, 480.0)]; _loadingBG.backgroundColor = [UIColor blackColor]; _loadingBG.alpha = 0.4; circlingWheel = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge]; CGRect wheelFrame = circlingWheel.frame; circlingWheel.frame = CGRectMake(((320.0 - wheelFrame.size.width) / 2.0), ((480.0 - wheelFrame.size.height) / 2.0), wheelFrame.size.width, wheelFrame.size.height); [wrapperLoading addSubview:_loadingBG]; [wrapperLoading addSubview:circlingWheel]; [circlingWheel startAnimating]; [textme.window addSubview:wrapperLoading]; [_loadingBG release]; [circlingWheel release]; } -(void)hideLoadingAnimationView { [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO]; wrapperLoading.alpha = 0.0; [self.wrapperLoading removeFromSuperview]; //[NSTimer scheduledTimerWithTimeInterval:0.8 target:wrapperLoading selector:@selector(removeFromSuperview) userInfo:nil repeats:NO]; } Here is how I am calling these two methods [NSThread detachNewThreadSelector:@selector(showLoadingAnimationView) toTarget:self withObject:nil]; and then somewhere later in the code i am using following function call to hide animation. [self hideLoadingAnimationView]; I am getting memory leaks when I call showLoadingAnimationView function. Anything wrong in the code or is there any better technique to show loading animation when we do network calls?

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• Navigation Controller Views in Landscape

  - by Mahadevan S

  Hi, I have set up a navigation controller ( navController ) in Portrait mode to which I push all the viewcontrollers I have. Now when a user switches to Landscape mode, I need to display all the views as a coverflow. For this I use [navController viewControllers] to get all the view controllers in the stack. In the Landscape view controller NSArray * arr = [navController viewControllers]; self.view = [arr objectAtIndex:0]; [arr objectAtIndex:0]; returns the correct view ( the bottombost viewcontroller's view in the nav stack ). My problem is these views never get displayed ie the views extracted from the navController never gets displayed. If i try to create a new view and insert all the subviews of a view, it gets displayed. eg : UIView * newView = [[UIView alloc] init]; for (UIView *subView in [arr objectAtIndex:0]) [newView addSubView:subView]; self.view = newView; The above piece of code works. But simply adding the view doesnt seem to work.. Can anyone explain the solution? Many thanks

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• Cannot read values from [NSUserDefaults standardUserDefaults] after synchronize

  - by Nonlinearsound

  In the Application Delegate didFinishLaunching method, I am using the following code to build up a new NSDictionary to be used as the new settings bundle for the user: NSNumber *testValue = (NSNumber*)[[NSUserDefaults standardUserDefaults] objectForKey:@"settingsversion"]; if (testValue == nil) { NSNumber *numNewDB = [NSNumber numberWithBool:NO]; NSNumber *numFirstUse = [NSNumber numberWithBool:YES]; NSDate *dateLastStatic = [NSDate date]; NSDate *dateLastMobile = [NSDate date]; NSNumber *numSettingsversion = [NSNumber numberWithFloat:1.0]; NSDictionary *appDefaults = [NSDictionary dictionaryWithObjectsAndKeys: numNewDB, @"newdb", numFirstUse, @"firstuse", numSettingsversion, @"settingsversion", dateLastStatic, @"laststaticupdate", dateLastMobile, @"lastmobileupdate", nil]; [[NSUserDefaults standardUserDefaults] registerDefaults:appDefaults]; [[NSUserDefaults standardUserDefaults] synchronize]; } Later in another ViewController I am trying to read back a value from that same Dictionary, saved as the NSUserDefaults - well at least I thought it would, but I don't get any valid object pointer for the desired member lastUpdate back there: in .h file: NSDate *lastUpdate; in the .m file in a member function: lastUpdate = (NSDate *)[[NSUserDefaults standardUserDefaults] objectForKey:@"laststaticupdate"]; Even, if I print out the content of [NSUserDefaults standardUserDefaults] I only get this: 2010-04-29 15:13:22.322 myApp[4136:207] Content of UserDefaults: <NSUserDefaults: 0x11d340> This leads me to the conclusion that there is no standardUserDefaults dictionary somewhere in memory or it cannot be determined as such a structure. Edit: Every time, I restart the app ión the device, the check for testValue is Nil and I am building up the dictionary again but after one run it should be persistent on the Phone, right? Am I doing something wrong somewhere in between? I have the feeling that I yet didn't really understand how to load and save settings persistent for a certain application on the iPhone. Is there anything I have to do additionally to this? Integrating a settings.bundle in XCode or saving the dictionary manually to the Documents folder? Can someone help me out here? Thanks a lot!

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• Warning: passing Argument 1 of "sqlite3_bind_text" from incompatible pointer type" What should I do

  - by Amarpreet

  Hi All, i am pretty new in iphone development. I have created one function to insert data into database. The code compiles successfully. But when comes to statement sqlite3_bind_text(sqlStatement, 1, [s UTF8String], -1, SQLITE_TRANSIENT); it does not do anything but hangs AND in warning it says "passing Argument 1 of "sqlite3_bind_text" from incompatible pointer type"" for all statements in Red colour The same code i am using to fetch the data from database and its working on other viewController. Below in the code. Its pretty straightforward. Please help guys. -(void) SaveData: (NSString *)FirstName: (NSString *)LastName: (NSString *)State: (NSString *)Street: (NSString *)PostCode { databaseName = @"Zen.sqlite"; NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDire ctory, NSUserDomainMask,YES); NSString *documentsDir=[documentPaths objectAtIndex:0]; databasePath=[documentsDir stringByAppendingPathComponent:databaseName]; sqlite3 *database; if(sqlite3_open([databasePath UTF8String], &database) == SQLITE_OK) { const char *sqlStatement = "insert into customers (FirstName, LastName, State, Street, PostCode) values(?, ?, ?, ?, ?)"; sqlite3_stmt *compiledStatement; sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL); sqlite3_bind_text(sqlStatement, 1, [FirstName UTF8String], -1, SQLITE_TRANSIENT); sqlite3_bind_text(sqlStatement,2,[LastName UTF8String],-1,SQLITE_TRANSIENT); sqlite3_bind_text(sqlStatement,3,[State UTF8String],-1,SQLITE_TRANSIENT); sqlite3_bind_text(sqlStatement,4,[Street UTF8String],-1,SQLITE_TRANSIENT); sqlite3_bind_text(sqlStatement,5,[PostCode UTF8String],-1,SQLITE_TRANSIENT); sqlite3_step(sqlStatement); sqlite3_finalize(compiledStatement); } sqlite3_close(database); }

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• Autorotation and multiple view controllers

  - by alku83

  I'm creating an iPad application which should only work in portrait and portait upsidedown modes. For performance reasons in my applicationDidFinishLaunching method I'm creating several viewControllers, and adding them to my main window as subviews. I then hide the ones I don't want to see straight away. There is no tab bar or navigation controller. My problem is that only the first viewController seems to be receiving the rotate calls. I have verified this by swapping around the order in which I add the subviews to the main window and NSLog's. Is there some way I can force all the controllers to receive the calls? Some of my views are designed to lay over the top of another view, but this behind view will not always be the same one - so it seems to make sense to have the overlay view in a separate view controller. Am I doing something fundamentally wrong, and that's why it's not behaving as I would expect? EDIT: The accepted answer for this question seems to indicate the exact problem I'm facing: http://stackoverflow.com/questions/548142/uiviewcontroller-rotate-methods

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• _resignRootViewController causes app to crash.

  - by RickiG

  [MainViewController _resignRootViewController]: message sent to deallocated instance 0x4ebfe50 This error happens when I try to pop my MainViewController Object from within it self: - (void) switchToTableView { //a method on the MainViewController [self.navigationController popViewControllerAnimated:NO]; [[UIApplication applicationDelegate] switchToTableView]; //convenience method for the app delegate } The debugger stops at the [super dealloc] command in MainViewControllers dealloc method. I do the exact same thing in the TripTableViewController, but here it never crashes. MainViewController and TripTableViewController are handled in my AppDelegate like this: - (void) switchToTableView { TripTableViewController *tripTableViewController = [[TripTableViewController alloc] init]; [[self.navigationController navigationBar] setHidden:NO]; [self.navigationController pushViewController:tripTableViewController animated:NO]; [tripTableViewController release]; } - (void) switchToScrollView { MainViewController *scrollView = [[MainViewController alloc] init]; [[self.navigationController navigationBar] setHidden:YES]; [self.navigationController pushViewController:scrollView animated:NO]; [scrollView release]; } I am trying to achieve that when the user goes from TripTableViewController to MainViewController; TripTableViewController is released/popped and visa versa for the MainViewController. I do not wish for the navigationController to make the decision about when to pop/cache/release them, this is why I try to do it from within it self. I have not been able to find the _resignRootViewController mentioned anywhere. My guess is that it is a delegate message sent by a ViewController that resigns as rootViewController for a navigationController and that somehow it is called twice, once before MainViewCOntroller is released/popped and somehow again afterwards. Have any one else seen this error message before? Google and the Apple Docs does not mention it? How can I debug such an error? Hope someone can guide me in the right direction on this one, Thanks:)

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• Subclass of UIView with Xib file.

  - by rdesign

  Hey guys, Although I've searched the Board and used google, I didn't get any useful results. I've trying to make a subclass of UIView loading its view from a xib file. My approach is the following: 1. Creating a subclass (named mySubclass): @interface mySubclass : UIView { } @end Creating a view through: Add New File... User Interface View XIB Connecting the Xib and the subclass: In IB select the View and set the class to mySubclass. In my viewController I make an instance of my new subclass and add to my view. -(void)viewDidLoad { mySubclassIns = [[mySubclass alloc] initWithFrame:CGRectMake(0, 0, 320, 460)]; [self.view addSubview:mySubclassIns]; [super viewDidLoad]; } Result: Noting shows up in my App :( If I don't set it up programmatically but rather with IB it doesn't work either. (Am I setting it up right when choosing a view in IB and set the class to myClass?) I would be really thankful for your help! Thanks in advance.

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• How to make UIButton work like Launcher in SpringBoard, when pressed for long timeinterval

  - by KayKay

  In my ViewController I am using UIButton which triggers some action when touchedUpInside. Upto here no problem, but i also want to add another action for touchDown event. More precisely i dont have an idea how to add that action to which event, that will work the same as when App-Icon is pressed longer in springboard which causes springboard enter in editing mode.Actually what i want is : when this button is kept holding for ,say about 2 seconds it will pop-up an alertView without touch being heldUp (with finger is still on button). I have tried with 2 NSdate difference, one of which is allocated when touchedDown and other when touchUpInside. Its working and popping alert,but only after touchedUpInside. I want it to show alert without touch being removed. Here is the code. (IBAction)touchedDown:(id)sender { momentTouchedDown = [[NSDate alloc] init];//class variable NSLog(@"touched down"); } - (IBAction)touchUpInside:(id)sender { NSLog(@"touch lifted Up\n"); NSDate *momentLifted = [[NSDate alloc] init]; double timeInterval = [momentLifted timeIntervalSinceDate:momentTouchedDown]; NSLog(@"time lifted = %@, time down = %@, time diff = %@", momentLifted, momentTouchedDown, [NSString stringWithFormat:@"%g",timeInterval]); [momentLifted release]; if(timeInterval > 2.0) { NSLog(@"AlertBox has been fired"); UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Yes" message:@""//msg delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK" , nil]; [alert show]; [alert release]; } } Please provide me an insight..thanks for help in advance.

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• SIGABRT on any UIView touch

  - by bitcruncher

  Hi. I'm afraid no amount of Googling has been able to save my hyde on this. I seem to be getting SIGABRT error anytime I touch the screen of the phone, on any UIView. The debugger console posts this error before the SIGABRT: .... [310:207] *** -[UIView _exclusiveTouchView]: unrecognized selector sent to instance 0x14c0c0 .... [310:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[UIView _exclusiveTouchView]: unrecognized selector sent to instance 0x14c0c0' (this is not my specific call to _exclusiveTouchView, of course.) I would gladly post some code, but the truth is I cannot find (or guess) where this problem may be coming from. This is not happening on any ONE UIView but on all the UIViews in my stack. I can summarize the display logic, though, perhaps that will shed some light. So the application is created and a UIWindow is alloc'd. A single viewcontroller is then alloc'd, which makes and adds its own blank self.view, to which the other UIViews, representing the different game states, are attached. Interestingly enough, this error is does NOT happen on the Simulator, but happens consistently on the device. And I should also mention that the application has yet to override/use any of the touchesBegan:/Ended:/Moved: etc... In other words, this error happens without these methods in the code. I'm really not understanding where this error is coming from... Any suggestions?

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• iPhone SDK: Progressive UITableView updates, smoothly animated

  - by boliva

  Hi all, There's something I've been trying to do with no success. I have an UITableView whose viewController is both its delegate and dataSource. On it I also have a mutableArray as a property, which basically acts as the tableView dataSource. This mutableArray gets continously updated from an online XML source. What I haven't been able to accomplish successfully is to animate the adding of new rows at the top of the tableView and the deletion of the oldest rows at its bottom (thinking I'll always going to show the same amount of data, say the latest 10 entries). The method I'm actually using is that, after finishing receiving and parsing the XML data I'm removing all the contents of the mutableArray and storing the new entries on it, to later reload the tableView (calling the 'reloadData' method). In between I'm using a CATransition in order to 'fade' the tableView from its previous to its new state. I tried using beginUpdates and endUpdates, with code for selectively removing the old rows from the tableView and adding the new ones to it, as well as to its datasource, however the animation takes place in the whole table instead of the affected rows only. What I want to accomplish is, after an update, to delete as many rows from the 'bottom' of the table as new entries I have retrieved, sliding the tableView down and adding the new rows at the top of it, smoothly animated. Best regards,

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• iPhone UIScrollView embedded UIView is clipped

  - by scc

  Hello. I have an iPad UIView subclass (we'll call LargerUIView) with which I do a bunch of drawing via drawRect: once asked. That all appears to be working, and looks the way I like. I'm at the point now of trying to get scrolling working (just in the horizontal to begin), yet when I try to scroll, what shows below is black (ie, appears to have never been drawn). That doesn't surprise me as it's likely been clipped. Looking for suggestions. Here's what I'm doing so far: MyAppDelegate.m - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { CGRect scrollRect = CGRectMake(0, 0, 768, 1024); UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:scrollRect]; LargerUIView *view = (LargerUIView *)[viewController view]; [scrollView addSubview:view]; [scrollView setContentSize:CGSizeMake(768, pageHeight)]; [scrollView setContentMode:UIViewContentModeRedraw]; [scrollView setClipsToBounds:YES]; [window addSubview:scrollView]; [scrollView release]; // Without this next line, the "frontmost" (ie, most recently added subview) // is the MoxiesAppetizerMenu - which is not equipped to handle scrolling/UIEvents [window sendSubviewToBack:view]; // Show it all. [window makeKeyAndVisible]; return YES; } Any suggestions? Have tried changing "setClipsToBounds" to NO as well.

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• Xcode 5 - remove storyboard and start app with a .xib

  - by Lucy

  I've tried to follow the instructions on this Question. But I must not be doing something correctly because I am still getting a SIGABRT before I even get into the ViewController methods. Here are the steps: Copied all items on the view in the story board and pasted into the new xib view. Copied all contents of .h and .m view controller files into the new ones for the xib. Changed the Main nib file base name to the new xib name in the info.plist file. Tried to change the owner but I don't know if I'm doing that correctly. Edited the appdelegate didFinishLaunchingWithOptions file as follows: - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] ; // Override point for customization after application launch. TestViewController *test = [[TestViewController alloc] initWithNibName:@"TestViewController" bundle:nil]; UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:test]; self.window.rootViewController = nav; [self.window makeKeyAndVisible]; return YES; } I even tried to start with an empty project like one of the last posts suggested and still get a SIGABRT when I try to run. Has Apple made it impossible to remove the storyboard? I'm creating an SDK. I don't want a storyboard. But I do need one xib that is rotatable. Help?

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• Iphone - UIView not displayed

  - by Raphael Pinto

  Hi, I have a strange problem with a UIView : I want to show an Activity Indicator View that I created with Interface Builder to indicate long running activity. In the viewDidLoad function of my principal viewController I init the ActivityIndicator View like this : - (void)viewDidLoad { [super viewDidLoad]; appDelegate = (MyAppDelegate *)[[UIApplication sharedApplication] delegate]; load = [[ActivityIndicatorViewController alloc] init]; ... When I push a button it call this IBAction : - (IBAction)LaunchButtonPressed{ // Show the Activity indicator view. [self.view addSubview:load.view]; // eavy work [self StartWorking]; // Hide the loading view. [load.view removeFromSuperview]; } In the StartWorking function, I ask a request to an internet serveur and parse the XML file that it return me. The problem is that if I Call my StartWorking function, the application do not start by showing the Activity Indicator view but with the StartWorking function. Whereas if I remove the call to StartWorking function, the view is shown. Is someone able to explain me why? :s

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• Presenting an image cropping interface

  - by wkw

  I'm trying to engineer a UI for cropping images in iphone OS and suspect I'm going about things the hard way. My goal is pretty much what the Tapbots duo have done with Pastebot. In that app, they dim the source image but provide a movable and resizable cropping view and the image you're cropping is in a zoomable scrollview; when you resize or move the underlying image, the cropping view adjusts appropriately. I mocked up a composite image which will give a sense of the design I'm after, along with how I presently have my view hierarchy setup, viewable here The approach I've started with is the following: UIImageView with the image to crop is in a scrollview, a plain UIView with black fill and suitable transparency/alpha setting is added in front of the imageview. I then use a custom UIView which is a sibling to the scrollview at a higher level, which implements the drawRect: method and for the most part calls CGImageCreateWithImageInRect to get the portion of the image's bitmap that matches the position of the cropping view and draws that to the CGContext. in the viewcontroller I'm using the UIScrollViewDelegate methods to track scrolling and passing those changes to the custom cropping UIView so it stays in sync with the scroll contentOffset. That much is finally working. But trying to keep in sync as the scrollview zoomScale changes is when I figured I should ask for help. Looking for suggestions or guidance. My initial approach just seems like more work than is required. Could this be done with a masking layer in the ImageView? And if so, how would I setup the tracking for moving and resizing the cropping rect? My experience working with layers is non-nil, but very limited thus far.

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• Problem pushing multiple view controllers onto navigation controller stack

  - by Jim

  Hi, I am trying to push three view controllers onto the navigation controller. [self.navigationController pushViewController:one animated:YES]; [self.navigationController pushViewController:two animated:YES]; [self.navigationController pushViewController:three animated:YES]; The desired behavior is that view three will show, and when the back button is pressed it will go to view two and then to view one... What actually happens is that view one is visible and pressing back goes to view two and then back again it goes to view one. Which is to say that view one is shown instead of view three. Very strangely, looking at the viewController array of the navigationController after the calls above show the right entries, and looking at the visibleViewController property shows that it has view three in it... even though view one is visible. If i navigate to a sub view from the visible view one (that shows in the place of view three) and press back from that sub view... it goes to view three. It looks like it is showing view one, but knows it is on view three... I am completely confused... any ideas? Jim

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• How to get rid of gap when I add my custom UIViewController to window?

  - by wgpubs

  I'm getting this gap at the bottom of my window after I add the view of a custom UIViewController. The gap goes away as the view is shifted down after I move to another view and then back. Here is the code in the app delegate: - (void)applicationDidFinishLaunching:(UIApplication *)application { // Override point for customization after application launch CustomViewController *gvc = [[CustomViewController alloc] init]; self.customViewController = gvc; [gvc release]; [window addSubview:customViewController.view]; [window makeKeyAndVisible]; } "CustomViewController" is used as a root view controller to simply coordinate which other UIViewControllers to display. As such I simply set its view = to that of the first ViewController's view needed like so: - (void)loadView { UIView *v = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)]; self.view = v; [v release]; // Add the HomeViewController to the top of the stack MainViewController *mvc = [[MainViewController alloc] initWithNibName:@"MainView" bundle:nil]; mvc.delegate = self; self.mainViewController = mvc; [mvc release]; [self.view addSubview:self.mainViewController.view]; } I've tried a bunch of things including what you see here with no luck. Any ideas? thanks

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• UIAlertView choice causing resignFirstResponder to fail

  - by Chazbot

  Hi everyone. I'm having a similar issue to Anthony Chan's question, and after trying every suggested solution, I'm still stuck. Somehow, only after interacting with my UIAlertView, I'm unable to dismiss the keyboard in another view of my app. It's as though the Alert is breaking my UITextField's ability to resignFirstResponder. Below I instantiate my UIAlertView, which then calls its didDismissWIthButtonIndex method. Then, I call the showInfo method, which loads another UIViewController. UIAlertView *emailFailAlert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"error message text." delegate:self cancelButtonTitle:@"Not now" otherButtonTitles:@"Settings", nil]; [emailFailAlert setTag:2]; [emailFailAlert show]; [emailFailAlert release]; Once the 'Settings' option is pressed, I'm calling this method: - (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex { if ([alertView tag] == 2) { if (buttonIndex == 1){ [self showInfo:nil]; } } } My showInfo method loads the other ViewController, via the code below: - (IBAction)showInfo:(id)sender { FlipsideViewController *fscontroller = [[FlipsideViewController alloc] initWithNibName:@"FlipsideView" bundle:nil]; fscontroller.delegate = self; fscontroller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal; [self presentModalViewController:fscontroller animated:YES]; [fscontroller release]; } Upon clicking any textField in this Flipside VC, I'm unable to dismiss the keyboard as I normally can with - (BOOL)textFieldShouldReturn:(UITextField *)textField, and [textField resignFirstResponder]. I've omitted this code bc this question is getting long, but I'm happy to post if necessary. The interesting part is that if I comment out the [self showInfo:nil] call made when the button is clicked and call it by clicking a test button (outside the alertView didDismissWithButtonIndex: method), everything works fine. Any idea what's happening here? Thanks in advance!

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