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POApp crashes on iPad but not in iPad Simulator
 

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  1. POApp crashes on iPad but not in iPad Simulator
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    <p>Somewhere along the line, my app started crashing on the iPad though it still works great in the Simulator. I'm using XCode 4.3.1, and deploying on iOS 5.1. </p> <p>The relevant code is below. It crashes when executing ImageLayer's drawInContext: method. </p> <p>ImageLayer.h:</p> <pre><code>#import &lt;QuartzCore/QuartzCore.h&gt; @interface ImageLayer : CALayer {} @property (nonatomic, retain) NSString *path; @end </code></pre> <p>ImageLayer.m:</p> <pre><code>#import "ImageLayer.h" @implementation ImageLayer @synthesize path; - (void)drawInContext:(CGContextRef)ctx { [super drawInContext:ctx]; CGImageRef img = [UIImage imageWithContentsOfFile:path].CGImage; NSLog(@"path = %@", path); if (img) { CGRect rect = CGContextGetClipBoundingBox(ctx); CGContextTranslateCTM(ctx, 0.0, rect.size.height); CGContextScaleCTM(ctx, 1.0, -1.0); rect = CGContextGetClipBoundingBox(ctx); CGContextDrawImage(ctx, rect, img); // Crashes here! CGContextScaleCTM(ctx, 1.0, -1.0); } } @end </code></pre> <p>LayeredView.h: </p> <pre><code>#import &lt;UIKit/UIKit.h&gt; @interface LayeredView : UIView {} @end </code></pre> <p>LayeredView.m:</p> <pre><code>#import "LayeredView.h" #import "ImageLayer.h" @implementation LayeredView - (id)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { NSString *path = [[[[NSBundle mainBundle] bundlePath] stringByAppendingPathComponent: @"Letter A"] stringByAppendingPathComponent:@"bg.png"]; ImageLayer *l = [ImageLayer layer]; l.path = path; l.frame = CGRectMake(0, -27, 1024, 795); [self.layer addSublayer:l]; [l setNeedsDisplay]; } return self; } </code></pre> <h2>Crash Log</h2> <pre><code>Incident Identifier: F0104517-289E-4B50-BBD0-5E9E0B19BAE8 CrashReporter Key: dc4048f7e9778dfac3941d3352d4edac4a35bd47 Hardware Model: iPad2,1 Process: ABC [4843] Path: /var/mobile/Applications/88FE4107-4433-4A36-A511-0B9619B256EB/ABC.app/ABC Identifier: ABC Version: ??? (???) Code Type: ARM (Native) Parent Process: launchd [1] Date/Time: 2012-03-16 14:38:30.326 -0700 OS Version: iPhone OS 5.1 (9B176) Report Version: 104 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x00000000, 0x00000000 Crashed Thread: 0 Thread 0 name: Dispatch queue: com.apple.main-thread Thread 0 Crashed: 0 libsystem_kernel.dylib 0x371a132c 0x37190000 + 70444 1 libsystem_c.dylib 0x33307208 0x332ba000 + 315912 2 libsystem_c.dylib 0x33300298 0x332ba000 + 287384 3 GraphicsServices 0x333d987c 0x333d5000 + 18556 4 GraphicsServices 0x333da2bc 0x333d5000 + 21180 5 UIKit 0x35b50c5a 0x35b1f000 + 203866 6 ABC 0x000e045c 0xdf000 + 5212 7 ABC 0x000e0400 0xdf000 + 5120 </code></pre>
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      1. POApp crashes on iPad but not in iPad Simulator
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    1. COadding a crash log / whatever XCode gives you might help here
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      1. POApp crashes on iPad but not in iPad Simulator
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    2. COGood idea. I added the crash log up to the first, crashed thread. In XCode, the crash ends up somewhere in machine code, where CGContextAddPath is calling CGPathCreateMutableCopyByTransformingPath, which in turn is calling CG::Path::Path(CG::Path const&). I believe this happens in my call to CGContextDrawImage, listed above.
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      1. POApp crashes on iPad but not in iPad Simulator
      1. USDylan Kohler
 

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