title: iOS App Crash on startup
body: <p>The latest version of my app has started to crash on startup for some users. There is only 1 crash report in itunes which is included below. I have been unable to reproduce on any devices.</p>
  
  <p>The changes between the two version are</p>
  
  <ol>
  <li>Integrated two third party libraries (iNotify, openUDID)</li>
  <li>Switched from the GCC compiler to the Apple LLVM 3.1  compiler (new libraries need arc support)</li>
  <li>Compiled the new libraries's code with arc enabled, left arc disabled for the rest of the project.</li>
  </ol>
  
  <p>I added 1 line to the didFinishLaunchingWithOptions in my appdelegate for iNotify. From the stack trace through I do not think its crashing in there.</p>
  
  <p>At a bit of a loss where to go with this. Any help would be appreciated. Thanks!</p>
  
  <pre><code>Hardware Model:      iPhone4,1
  Process:         MyAPP [3251]
  Path:            /var/mobile/Applications/228BBF42-A374-4773-8C18-EFA47CE98C02/MyAPP.app/MyAPP
  Identifier:      MyAPP
  Version:         ??? (???)
  Code Type:       ARM (Native)
  Parent Process:  launchd [1]
  
  Date/Time:       2012-05-03 19:50:07.917 -0500
  OS Version:      iPhone OS 5.1 (9B179)
  Report Version:  104
  
  Exception Type:  EXC_CRASH (SIGABRT)
  Exception Codes: 0x00000000, 0x00000000
  Crashed Thread:  0
  
  Last Exception Backtrace:
  0   CoreFoundation                    0x3729e88f __exceptionPreprocess + 163
  1   libobjc.A.dylib                   0x357a4259 objc_exception_throw + 33
  2   CoreFoundation                    0x372a1a9b -[NSObject doesNotRecognizeSelector:] + 175
  3   CoreFoundation                    0x372a0915 ___forwarding___ + 301
  4   CoreFoundation                    0x371fb650 _CF_forwarding_prep_0 + 48
  5   UIKit                             0x33aa9f93 -[UIAlertView(Private) _popoutAnimationDidStop:finished:] + 855
  6   UIKit                             0x3395fc53 -[UIViewAnimationState sendDelegateAnimationDidStop:finished:] + 471
  7   UIKit                             0x3396557d -[UIViewAnimationState animationDidStop:finished:] + 53
  8   QuartzCore                        0x341fbc2f CA::Layer::run_animation_callbacks(void*) + 203
  9   libdispatch.dylib                 0x344f6ee7 _dispatch_main_queue_callback_4CF$VARIANT$mp + 195
  10  CoreFoundation                    0x372712ad __CFRunLoopRun + 1269
  11  CoreFoundation                    0x371f44a5 CFRunLoopRunSpecific + 301
  12  CoreFoundation                    0x371f436d CFRunLoopRunInMode + 105
  13  GraphicsServices                  0x32101439 GSEventRunModal + 137
  14  UIKit                             0x33978e7d UIApplicationMain + 1081
  15  MyAPP                          0x00002bfb main (main.m:14)
  16  MyAPP                          0x00002bb4 0x00002bb4
  
  
  Thread 0 name:  Dispatch queue: com.apple.main-thread
  Thread 0 Crashed:
  0   libsystem_kernel.dylib            0x3571d32c __pthread_kill + 8
  1   libsystem_c.dylib                 0x3186b208 pthread_kill + 48
  2   libsystem_c.dylib                 0x31864298 abort + 88
  3   libc++abi.dylib                   0x34e70f64 abort_message + 40
  4   libc++abi.dylib                   0x34e6e346 _ZL17default_terminatev + 18
  5   libobjc.A.dylib                   0x357a4350 _objc_terminate + 140
  6   libc++abi.dylib                   0x34e6e3be _ZL19safe_handler_callerPFvvE + 70
  7   libc++abi.dylib                   0x34e6e44a std::terminate() + 14
  8   libc++abi.dylib                   0x34e6f81e __cxa_rethrow + 82
  9   libobjc.A.dylib                   0x357a42a2 objc_exception_rethrow + 6
  10  CoreFoundation                    0x371f4506 CFRunLoopRunSpecific + 398
  11  CoreFoundation                    0x371f4366 CFRunLoopRunInMode + 98
  12  GraphicsServices                  0x32101432 GSEventRunModal + 130
  13  UIKit                             0x33978e76 UIApplicationMain + 1074
  14  MyAPP                          0x00002bf4 main (main.m:14)
  15  MyAPP                          0x00002bac 0x00002bac
  
  Thread 1 name:  Dispatch queue: com.apple.libdispatch-manager
  Thread 1:
  0   libsystem_kernel.dylib            0x3570d3a8 kevent + 24
  1   libdispatch.dylib                 0x344f7f04 _dispatch_mgr_invoke + 708
  2   libdispatch.dylib                 0x344f7c22 _dispatch_mgr_thread + 30
  
  Thread 2 name:  WebThread
  Thread 2:
  0   libsystem_kernel.dylib            0x3570d004 mach_msg_trap + 20
  1   libsystem_kernel.dylib            0x3570d1fa mach_msg + 50
  2   CoreFoundation                    0x372723ec __CFRunLoopServiceMachPort + 120
  3   CoreFoundation                    0x37271124 __CFRunLoopRun + 876
  4   CoreFoundation                    0x371f449e CFRunLoopRunSpecific + 294
  5   CoreFoundation                    0x371f4366 CFRunLoopRunInMode + 98
  6   WebCore                           0x32eb40f0 _ZL12RunWebThreadPv + 396
  7   libsystem_c.dylib                 0x3182c72e _pthread_start + 314
  8   libsystem_c.dylib                 0x3182c5e8 thread_start + 0
  
  Thread 3:
  0   libsystem_kernel.dylib            0x3571dcd4 __workq_kernreturn + 8
  1   libsystem_c.dylib                 0x31826f36 _pthread_wqthread + 610
  2   libsystem_c.dylib                 0x31826cc8 start_wqthread + 0
  
  Thread 4 name:  com.apple.CFSocket.private
  Thread 4:
  0   libsystem_kernel.dylib            0x3571d570 __select + 20
  1   CoreFoundation                    0x3727663a __CFSocketManager + 726
  2   libsystem_c.dylib                 0x3182c72e _pthread_start + 314
  3   libsystem_c.dylib                 0x3182c5e8 thread_start + 0
  
  Thread 5:
  0   libsystem_kernel.dylib            0x3571dcd4 __workq_kernreturn + 8
  1   libsystem_c.dylib                 0x31826f36 _pthread_wqthread + 610
  2   libsystem_c.dylib                 0x31826cc8 start_wqthread + 0
  </code></pre>
  
  <p>Some additional code.</p>
  
  <p>There is an alertview defined in the appdelegate as follows:</p>
  
  <pre><code>#import &lt;UIKit/UIKit.h&gt;
  
  
  @class MyAPPViewController;
  
  
  @interface MyAPPAppDelegate : NSObject &lt;UIApplicationDelegate&gt; {
      UIViewController *rvc;
      UIAlertView *m_cAlertControl;
  }
  
  @property (nonatomic, retain) IBOutlet UIWindow *window;
  
  
  -(BOOL)shouldNag;
  -(void)shouldEnableUI:(BOOL)pIsEnable;
  -(void)updateRunCount;
  
  @end
  </code></pre>
  
  <p>and a method implemented in the app delegate as follows:</p>
  
  <pre><code>-(void)shouldEnableUI:(BOOL)pIsEnable
  { 
      if(NO == pIsEnable)
      {
          if (nil == m_cAlertControl) {
          m_cAlertControl = [[UIAlertView alloc] init];
      }
      m_cAlertControl.backgroundColor = [UIColor clearColor];
      m_cAlertControl.opaque = NO;
      [m_cAlertControl setHidden:YES];
      [m_cAlertControl show];
  }
  else {
      if (nil != m_cAlertControl) {
          [m_cAlertControl dismissWithClickedButtonIndex:0 animated:YES];
      }
  }
  </code></pre>
  
  <p>}</p>
  
  <p>The View controller's make calls to the method like this: </p>
  
  <p>[appDelegate shouldEnableUI:NO];</p>