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  • While running the JSon application,I got three errors?

    - by Madan Mohan
    I added it from existing files JSON floder and also added the framework and import the "JSON/JSON.h". After that while running apps, It is giving three erros that is no such files, they are #import "SBJSON.h" #import "NSObject+SBJSON.h" #import "NSString+SBJSON.h" When i select framework, Two of the files containing in it Headers and PrivateHeaders is red in colour. Do I need to set the Header and Private path please help me. Thank You.

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  • WebView with NSShadow slowdown

    - by Rodrigo
    I have a webview that shows some animated boxes, but it slows down and lags horribly when I put a drop shadow in the view. Without the shadow, the webview contents animate smoothly. I achieved a similar effect as safari/chrome when you do a elastic scroll with the touchpad. Looks nice! But doesnt run as smooth as in my inspirations. Here is the snippet of the shadow setting: NSShadow *dropShadow = [[NSShadow alloc] init]; [dropShadow setShadowColor:[NSColor blackColor]]; [dropShadow setShadowOffset:NSMakeSize(0, 0)]; [dropShadow setShadowBlurRadius:5.0]; [webview setWantsLayer: YES]; [webview setShadow: dropShadow]; [dropShadow release]; -- My question is: How can I work around this problem?

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  • NSMutableArray does not print well with several lines of string

    - by ahmet732
    while(sqlite3_step(compiledStatement) == SQLITE_ROW) { NSString *araci2 = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 2)]; [dbarray addObject:araci2]; NSLog(@"DB ITEMS: %@",dbarray); } First of all, I try to get a description longer than a line from db. While part of the value appears meaningful, some of the characters of those values are absurd like "00fu". How can I print them in proper fashion ?

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  • _NSAutoreleaseNoPool Breaking but No Helpful Stack Trace

    - by Matt Long
    I am getting the message: * _NSAutoreleaseNoPool(): Object 0x3f43660 of class UICFFont autoreleased with no pool in place - just leaking I have placed a break point using the symbol _NSAutoreleaseNoPool and the program does break, however, the stack trace does not show me any of my code only some UIView and Core Animation layer code. Is there a better way to get to the bottom of the issue? There is apparently a thread that does not have an auto release pool, but I can't figure out where. Thanks.

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  • want to go to next view from rightbarbutton item.

    - by uttam
    I am using this code to get the three button on the right side of the navigationbar ,button are visible but next to this I want to go to the next view from this three button image, text ,vedio. NSArray *segmentTextContent = [NSArray arrayWithObjects:@"Image",@"Text",@"Video",nil]; UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:segmentTextContent]; segmentedControl.frame = CGRectMake(13, 20, 150, kCustomButtonHeight); segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar; segmentedControl.momentary = YES; defaultTintColor = [segmentedControl.tintColor retain]; // keep track of this for later UIBarButtonItem *segmentBarItem = [[UIBarButtonItem alloc] initWithCustomView:segmentedControl]; self.navigationItem.rightBarButtonItem = segmentBarItem; if(segmentedControl.selectedSegmentIndex=0) { [segmentedControl addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged]; } else if(segmentedControl.selectedSegmentIndex==1) { [segmentedControl addTarget:self action:@selector(segmentAction1:) forControlEvents:UIControlEventValueChanged]; } else if(segmentedControl.selectedSegmentIndex==2) { [segmentedControl addTarget:self action:@selector(segmentAction2:) forControlEvents:UIControlEventValueChanged]; } [segmentBarItem release]; //[modalBarButtonItem release]; } return self; }

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  • How to make AVAudioPlayer play once it is stopped?

    - by Viral
    hi friends, I am using AVAudioplayer to play some sound. But once I make it stop using [player stop](where player is the object of AVAudioplayer] It is not starting again to play after some time when I call method [player play], So can any one tell me how to do the same in my application?? The play will again call using NSTimer method, after some delay of time. Thanks in advance...

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  • EXC_BAD_ACCESS when simply casting a pointer in Obj-C

    - by AlexChilcott
    Hi all, Frequent visitor but first post here on StackOverflow, I'm hoping that you guys might be able to help me out with this. I'm fairly new to Obj-C and XCode, and I'm faced with this really... weird... problem. Googling hasn't turned up anything whatsoever. Basically, I get an EXC_BAD_ACCESS signal on a line that doesn't do any dereferencing or anything like that that I can see. Wondering if you guys have any idea where to look for this. I've found a work around, but no idea why this works... The line the broken version barfs out on is the line: LevelEntity *le = entity; where I get my bad access signal. Here goes: THIS VERSION WORKS NSArray *contacts = [self.body getContacts]; for (PhysicsContact *contact in contacts) { PhysicsBody *otherBody; if (contact.bodyA == self.body) { otherBody = contact.bodyB; } if (contact.bodyB == self.body) { otherBody = contact.bodyA; } id entity = [otherBody userData]; if (entity != nil) { LevelEntity *le = entity; CGPoint point = [contact contactPointOnBody:otherBody]; } } THIS VERSION DOESNT WORK NSArray *contacts = [self.body getContacts]; for (NSUInteger i = 0; i < [contacts count]; i++) { PhysicsContact *contact = [contacts objectAtIndex:i]; PhysicsBody *otherBody; if (contact.bodyA == self.body) { otherBody = contact.bodyB; } if (contact.bodyB == self.body) { otherBody = contact.bodyA; } id entity = [otherBody userData]; if (entity != nil) { LevelEntity *le = entity; CGPoint point = [contact contactPointOnBody:otherBody]; } } Here, the only difference between the two examples is the way I enumerate through my array. In the first version (which works) I use for (... in ...), where as in the second I use for (...; ...; ...). As far as I can see, these should be the same. This is seriously weirding me out. Anyone have any similar experience or idea whats going on here? Would be really great :) Cheers, Alex

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  • iOS6: do we have to set rootViewController in App delegate in order to support different orientations?

    - by Centurion
    The app was perfectly fine working in iOS5 in landscape orientation. However in iOS6, it started to use portrait orientation in all view controllers. The methods shouldAutorotateToInterfaceOrientation are not called anymore. I read the new stuff about changed rotation mechanism in iOS6 and I was able to fix that by adding a line in my AppDelegate: self.window.rootViewController = _viewController _viewControler is the starting screen (Home-menu). All other view controllers implement shouldAutorotateToInterfaceOrientation method and returns YES for landscape orientations only. So, it's perfectly working solution for the app that needs to support only one orientation. However, the problem is I need one view controller (lets call it phone-VC) to be presented in portrait orientation. Now, if I want this view controller would be rotated then I need to return YES in Home-menu controller that is assigned to rootViewControler in appDelegate. However, I can't do that because this rootViewController is starting window that need to presented in landscape only, otherwise the layout with graphics in this window will break. But if I don't return YES from its shouldAutorotateToInterfaceOrientation (Home-menu) then the same method is not called in my view phone-VC that needs to be presented in portrait. Any ideas? Does the assignation of rootViewController is mandatory in AppDelegate? UPDATE: the problem exists on device (at least on iPhone4).

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  • Logging in to website with saved username and password

    - by DGund
    One of the functions of an app I am making involves logging the user into our Campus Portal website. For ease of use, the user may enter a username and password into the app once, and it will be saved for all future log-ins. When the user clicks a button, the information will automatically be sent to log in, and the website will be displayed in a UIWebView. Let us say that the username and password are each stored in an NSString. How can I use this data to log in to this website programmatically and display the page it in a UIWebView? I know little about posting and forms, so any help is appreciated. Would something like this Stackoverflow answer help? Here's the shell of my code for this - (IBAction)btnGo:(id)sender { username = usernameField.text; password = passwordField.text; if (saveSwitch.isOn) { //Save data if the user wants AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate]; usernameSaved = username; passwordSaved = password; [appDelegate.listOfPortalCredentials replaceObjectAtIndex:0 withObject:usernameSaved]; [appDelegate.listOfPortalCredentials replaceObjectAtIndex:1 withObject:passwordSaved]; } //Insert username and password to web form, log in to portal //This is where I need help }

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  • MPMediaickerController memory leak identified by Leaks instrument

    - by Joe
    This is code from Apple's Addmusic example. MPMediaPickerController *picker = [[MPMediaPickerController alloc] initWithMediaTypes: MPMediaTypeMusic]; picker.delegate = self; picker.allowsPickingMultipleItems = YES; picker.prompt = NSLocalizedString (@"Add songs to play", "Prompt in media item picker"); // The media item picker uses the default UI style, so it needs a default-style // status bar to match it visually [[UIApplication sharedApplication] setStatusBarStyle: UIStatusBarStyleDefault animated: YES]; [self presentModalViewController: picker animated: YES]; [picker release]; I'm using this code in my app and the Leaks instrument highlights a leak on the line: [self presentModalViewController: picker animated: YES]; I think that this is because this line retains a reference to picker which cannot be subsequently released. Is there any way around this or is Leaks incorrectly identifying a leak?

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  • Keyboard not dismissed

    - by sgosha
    I am developing a messaging application that have SMS.app-like UI. Conversation screen has text input field at the bottom which is moved up with keyboard. Tapping on conversation area dismisses keyboard by calling resignFirstResponder method on UITextView that we use. This usually works fine, but users report a weird bug which I can't reproduce and fix. People say that sometimes onscreen keyboard doesn't go away when they tap on conversation area, though text input field loses input focus. Once the view enters that abnormal state users are able to type with keyboard, but text that is being entered is not visible anywhere. This bug happens in one of conversation views and since then no one text input field in other views doesn't work as expected. The only way to stop this weird behavior is killing application from multitasking bar. Even more weird thing is that keyboard stays visible while navigating between view controllers in UINavigationController. I noticed two things: - if tap on ' Anyone else experiencing same problems. Any ideas on what may cause this bug?

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  • iPhone tableview: titleForHeaderInSection derived from array

    - by Nic Hubbard
    I have a tableview that is populated by an array. Currently the tableview has no grouping. What I would like to do is check a value of each array object, such as State, and group all the CA items together, all the OR items together, etc. Then, assign those groups a title. The array is dynamic, and will grow and get new values in the future, so I can't hardcode titles, I would like these to somehow come from my initial array. Currently I am using the following, but it does not take into account sorting of the array, or if I removed all of the items in the array that have to do with California. - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section { if (section == 0) { return @"California"; } else if (section == 1) { return @"Washington"; } else { return @"Utah"; } }//end tableView So, I am confusing myself as to how this would be possible. Any tips would be appreciated.

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  • Why does Custom UITableViewCell *sometimes* cause an NSInvalidArgumentException?

    - by Wayne Hartman
    I have created a custom UITableViewCell, but when I dequeue the cell, sometimes it throws an NSInvalidArgumentException: [UITableViewCell nameLabel]: unrecognized selector sent to instance 0x3b4e7f0 Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* -[UITableViewCell nameLabel]: unrecognized selector sent to instance 0x3b4e7f0' Now, my custom UITableViewCell does have an attribute nameLabel, so I am confused why it is throwing this error. Below is the code I use to dequeue the cell: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { NSUInteger row = [indexPath row]; CTMenuItemVO* key = [[[self retrieveCartItems] allKeys] objectAtIndex:row]; NSNumber* quantity = [[self retrieveCartItems] objectForKey:key]; static NSString* SectionsTableIdentifier = @"SectionsTableIdentifier2"; OrderItemCell* cell = (OrderItemCell*)[tableView dequeueReusableCellWithIdentifier: SectionsTableIdentifier]; if (cell == nil) { NSArray* topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"OrderItemCell" owner:nil options:nil]; for(id currentObject in topLevelObjects) { if ([currentObject isKindOfClass:[UITableViewCell class]]) { cell = (OrderItemCell*) currentObject; break; } } } cell.nameLabel.text = key.Name; cell.qtyLabel.text = [quantity stringValue]; return cell; }

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  • Using NSArray for C-type int comparisons

    - by Andrew Barinov
    I would like to iterate through an NSArray of ints and compare each one to a specific int. All ints are C type ints. The code I am using is as follows: -(int)ladderCalc: (NSArray*)amounts: (int)amount { int result; for (NSUInteger i=0; i< [amounts count]; i++) { if (amount < [amounts objectAtIndex:i]); { // do something } // do something } } However I get an error when comparing the int amount to the result of [amounts objectAtIndex:i] because you cannot compare id to int. Why is the id involved in this case? Shouldn't objectAtIndex just return the object at the index specified? Is it possible to cast the object returned to an C int and then do the comparison? Or should I just dispense with NSArray and do this type of thing in C?

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  • COCOA: Programatically creating new windows and accessing window objects

    - by Jeffrey Kern
    I'm having an issue with creating new windows in Cocoa. Hypothetically speaking, lets say I have "WindowA" and has a button called "myButton". When you click on "myButton", it runs this code in the following class file: -(void)openFile2:(id)sender { myNextWindow = [[TestWindowController alloc] initWithWindowNibName:@"MainMenu"]; NSString *testString = @"foo"; [myNextWindow showWindow:self]; [myNextWindow setButtonText:testString]; } The code in a nutshell makes a duplicate "WindowA" and shows it. As you can see, this code also runs a method called 'setButtonText', which is this: - (void)setButtonText:(NSString *)passedText { [myButton setTitle:passedText]; } The problem is that when I call this method locally, in the original window - the button text changes (e.g., [self setButtonText:testString]) it works. However, it does not work in the newly created window (e.g., [myNextWindow setButtonText:testString];) When I debug the newly created window, step by step, the 'myButton' value it gives is 0x0. Do I have to manually assign controllers/delegates to the new window? I think the 'myButton' in the code isn't associated to the 'myButton' in the newly created window. How would I fix this problem?

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  • Flexible Data source for Multi-Section Table View Controller

    - by TuanCM
    I have a TableViewController which display a list of NewsItem objects: @interface NewsItem : NSObject { NSString *feedID; NSString *title; NSDate *published; } I'm trying to implement a Table View Controller (multiple sections) that can display the list in two ways: One divide News Items into sections which based on Published Date The other would be based on FeedID (News source). And I don't know how to structure the data source so that the code is easy to maintain. I tried to put the list of News Items into a 2 dimension Array in this case is a NSMutableArray of NSArray objects. However I got some objc_exception_throw and I don't think this is flexible enough. Could you guys give me some ideas?

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  • What are the semantics of [myThing.myProperty release]?

    - by dugla
    I clearly have not fully grocked properties. I have an instance of a class, myThing. myThing has a property that has be synthesized: // .h @property(nonatomic,retain)MyCoolType *coolType; // .m @synthesize coolType; In my program I call: // The retain count on MyCoolType is 1. [myThing.coolType release]; The reference count on MyCoolType is now zero and dealloc should fire. So, shouldn't myThing.coolType now be nil? In my code that is not the case. How do a correctly release and force the property to return nil? Thanks, Doug

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  • How to check image during animation

    - by TomTom
    I have set up an animation in the following way (self is an UIImageView, myImages an Array of UIImages): self.animationImages = myImages; self.animationDuration = 50; self.animationRepeatCount = 0; [self startAnimating]; During the animation I'd like to check the current image. I tried it the following way if([self image]==[UIImage imageNamed:@"image1.png"]); but this does not work. Is there a straight forward way for this? Can I keep track of which image is shown during the animation?

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  • iphone getting hours/min/seconds app crashes.

    - by coure06
    i have this code in my overridden drawRect method NSDate *date = [NSDate date]; NSCalendar *calendar = [NSCalendar currentCalendar]; unsigned int unitFlags = NSHourCalendarUnit|NSMinuteCalendarUnit|NSSecondCalendarUnit; NSDateComponents *comp = [calendar components:unitFlags fromDate:date]; NSInteger h = [comp hour]; NSInteger m = [comp minute]; NSInteger s = [comp second]; NSLog(@"%i,%i,%i", h,m,s); NSLog(@"test"); [date release]; [calendar release]; [comp release]; I am calling drawRect using setNeedsDisplay from my custom method (timer based after each 1 secon). It runs only once and then app exit automatically. If i comment out all the code and just write NSLog(@"test"); then application works ok, it logs "test" after each 1 sec.

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  • How to calculate a point with an given center, angle and radius?

    - by mystify
    In this SO question, someone asked for calculating an angle from three points. I need to do the opposite thing. I want to draw a clock, and I have tiny tick images. An art dude made 60 of them, each with an individual and accurate shadow. So there are 60 distinct images at 10x10 points in size, already correctly rotated in the center of that square. So every 6 degrees one tick image has to be placed. I would just need to calculate the x/y coordinate based on a center point, an radius and an angle. So I have: an center point an radius an angle Is there an easy way to calculate the x/y coordinate with this? Maybe cocoa-touch already has a useful function or method for this?

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  • quartz2d translating the origin

    - by qwertyp96
    My understanding of quartz2d is that the code CGContextTranslateCTM(context, x, y); translates the coordinate system. I have a quartz2d view with lots of shapes on it, and the user needs to be able to pan around and zoom it. However, when using the CGContextScaleCTM(context, scaleX, scaleY); code, everything scales around the origin, not the center of the viewpoint the user is viewing. My solution to this was to use the following code: CGContextRef context = UIGraphicsGetCurrentContext(); CGContextTranslateCTM(context, 512.0+offset.x, 384.0+offset.y); //(512, 384) is the center of the iPad screen CGContextScaleCTM(context, scale, scale); You can translate around fine, but things still scale into the corner. What's wrong? EDIT: Oh. Wow. Duh. If you move the origin, the shapes move too, so you can't move it relative to the shapes. Now I know what's wrong, but how do I do that?(move the origin independently of the shapes)

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  • Expected specifier-qualifier-list before 'CGPoint'

    - by Rob
    My project compiles and runs fine unless I try to compile my Unit Test Bundle it bombs out on the following with an "Expected specifier-qualifier-list before 'CGPoint'" error on line 5: #import <Foundation/Foundation.h> #import "Force.h" @interface WorldObject : NSObject { CGPoint coordinates; float altitude; NSMutableDictionary *forces; } @property (nonatomic) CGPoint coordinates; @property (nonatomic) float altitude; @property (nonatomic,retain) NSMutableDictionary *forces; - (void)setObject:(id)anObject inForcesForKey:(id)aKey; - (void)removeObjectFromForcesForKey:(id)aKey; - (id)objectFromForcesForKey:(id)aKey; - (void)applyForces; @end I have made sure that my Unit Test Bundle is a target of my WorldObject.m and it's header is imported in my testing header: #define USE_APPLICATION_UNIT_TEST 1 #import <SenTestingKit/SenTestingKit.h> #import <UIKit/UIKit.h> #import "Force.h" #import "WorldObject.h" @interface LogicTests : SenTestCase { Force *myForce; WorldObject *myWorldObject; } @end

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