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• Why does my program crash when given negative values?

  - by Wayfarer

  Alright, I am very confused, so I hope you friends can help me out. I'm working on a project using Cocos2D, the most recent version (.99 RC 1). I make some player objects and some buttons to change the object's life. But the weird thing is, the code crashes when I try to change their life by -5. Or any negative value for that matter, besides…

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• Core Animation bad access on device

  - by user1595102

  I'm trying to do a frame by frame animation with CAlayers. I'm doing this with this tutorial http://mysterycoconut.com/blog/2011/01/cag1/ but everything works with disable ARC, when I'm try to rewrite code with ARC, it's works on simulator perfectly but on device I got a bad access memory. Layer Class interface #import…

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• My application crashing Please help me out.

  - by kiran kumar

  My Application get crashing ... its loading data of all the cities... and when i click its displaying my detailed view controller.... when iam getting back from my controller... and selecting another city my application get crashed.. Please help me out. To get idea i am pasting my code. #import…

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• When should I use static variables with primitive types?

  - by Felipe Cypriano

  Recently I came across the question NSString: Why use static over literal? and in the comments arrived a new question. In Objective-C there some "special" types that are just maps to C primitives. Like the NSInteger. #if __LP64__ || (TARGET_OS_EMBEDDED && !TARGET_OS_IPHONE) ||…

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• Cocos2d: Moving background on update: offsett issue

  - by mm24

  working with Objective C, iOS and Cocos2d I am developing a vertical scrolling shooter game for iPhone (retina display models with 640 width x 960 height pixel resolution). My basic algorithm works as following: I create two instances of an image that has exactly 640 width x 960…

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• How do I repeatedly move an image by 1 pixel?

  - by Will

  I have a method that is moving a UIImageView called shootImg across the screen: -(IBAction)shoot{ if (appDelegate.shootInt > 0) { if (direction == 1) { shootImg.center = CGPointMake(shootImg.center.x+1, shootImg.center.y); appDelegate.shootInt =…

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• Sound Delay With AVAudio Player

  - by Will Youmans

  I'm using the following code in my viewDidLoad to load a sound: NSURL * url = [NSURL fileURLWithPath: [NSString stringWithFormat:@"%@/Moto - Hit Sound.mp3", [[NSBundle mainBundle] resourcePath]]]; NSError * error; hitSoundPlayer = [[AVAudioPlayer…

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• Facebook event creation through iPhone app and Facebook Connect

  - by miorel

  How is this done? Is it even possible? All the function calls seem correct, but the result is always false: NSString *event = @"{\"name\":\"A party\",\"start_time\":\"1215929160\",\"end_time\":\"1215929160\",\"location\":\"Somewhere\"}"; NSDictionary…

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• iPhone OS 3.2 - How to register for notifcations that may not be available

  - by cdstamper

  So I'm trying to register for the MPMoviePlayerDidExitFullscreenNotification notification in my universal app (iPhone and iPad). Problem is, OS 3.1.3 doesn't support this notification, and just crashes. I've tried version checking, like so: if…

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• iPhone Objective C - error: pointer value used where a floating point value was expected

  - by Mausimo

  I do not understand why i am getting this error. Here is the related code: Photo.h #import <CoreData/CoreData.h> @class Person; @interface Photo : NSManagedObject { } @property (nonatomic, retain) NSData * imageData; @property…

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• Objective-C Out of scope problem

  - by davbryn

  Hi, I'm having a few problems with some Objective-C and would appreciate some pointers. So I have a class MapFileGroup which has the following simple interface (There are other member variables but they aren't important): @interface…

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• my C++ console program not working writing to console

  - by Wast334

  I am trying to write something.. to output to the console.... this is in my int main function...... using Foundation.Foundation; NSString* myString = @"Output Test"; NSLog(@"%@", myString); And I get the errors Error …

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• UITableView with background UIImageView hides table controls

  - by Khanzor

  I am having a problem setting the background of UITableView to a UIImageView (see below for why I am doing this), once the view is set, it works fine, and scrolls with the UITableView, but it hides the elements of the Table View. I…

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• Here i m sending my code for presentmodelViewController

  - by aman-gupta

  Hi Please help me out i want to switch to first view from third view directly here is my code:-where i m using presentModelViewcontroller // // ExperimentAppDelegate.h // Experiment // // Created by Aman on 4/20/10. // …

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• NSData's writeToFile method failing with server address

  - by Ricky

  Hi. I am trying to write an NSData object to a directory like so; [myData writeToFile:[NSString stringWithFormat:@"%@/%@.txt", path, filename] atomically:YES]; I receive no errors or warnings but I am assuming the write…

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• Detecting which UIButton was pressed in a UITableView

  - by rein

  Hi, I have a UITableView with 5 UITableViewCells. Each cell contains a UIButton which is set up as follows: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { …

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• GameKit: GKSession manual

  - by mongeta

  Hello, I want to connect two devices using the GKSession, starting one as a server and the other one as a client. Using this configuration I can't use the GKPeerPickerController. I'm having problems for connecting the…

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• Objective-C / UIButton / SetTitle

  - by apple92

  Does the setTitle method of UIButton retain the NSString passed as argument ? I guess I can rely on the fact that the property is defined as: property(nonatomic,readonly,retain) UILabel *titleLabel In this case, I…

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• Question about Objective C calling convention and argument passing on ARM

  - by overboming

  I want to know how objective C runtime handle arguments when I call a objective C method like [NSString stringWithFomat:@"%@, %@", @"Hello", @"World"] There are three arguments for this objective C call, how does…

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• Dealloc on my custom objective-C

  - by VansFannel

  Hello. I'm developing an iPhone application, and I very new on iPhone development. I've created some custom classes with instance variables (NSArray, NSString, etc.). All classes inherits from NSObject. Should I…

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• AVAudioRecorder Memory Leak

  - by Eric Ranschau

  I'm hoping someone out there can back me up on this... I've been working on an application that allows the end user to record a small audio file for later playback and am in the process of testing for memory…

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• xcode global variables

  - by Apache

  hi experts, how to get xcode variables result from one view controller to another view controller, actually in one view controller i called web services to get userID which is declare as NSString, and in…

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• Objective-C wrapper API design methodology

  - by Wade Williams

  I know there's no one answer to this question, but I'd like to get people's thoughts on how they would approach the situation. I'm writing an Objective-C wrapper to a C library. My goals are: 1) The…

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• UIWebView leak? Can someone confirm?

  - by Shaggy Frog

  I was leak-testing my current project and I'm stumped. I've been browsing like crazy and tried everything except chicken sacrifice. I just created a tiny toy project app from scratch and I can…

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• iPhone Title and Subtitle in Navigation Bar

  - by Reuven

  Hi there, In my application, I'd like to have the navigation bar display a title and subtitle. To that extent, I added the following code to my view controller: // Replace titleView CGRect…

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