在过去的两个月里，我一直在尝试修复一个停止播放的错误。我变得绝望了！
我的应用程序通常会在启动的前5-10秒内的某个时间点出来。这个问题只发生在小牛队，而我认为这个问题仅限于MacBook Pro，因为我还不知道另一台Mac上的情况。在某些机器上，它是系统性的，而在其他机器上则不是。
挂起可能随时发生，而且始终是等待信号量的结果。以下是3个不同的报告来演示问题（由于活动监视器的采样功能）。
在我的笔记本电脑上，重启后会出现问题，但后续尝试通常会起作用，这使得调试更加困难。我目前可以使用几乎每次都挂起的笔记本电脑。尽管如此，即使使用XCode，我也无法确定问题，因为它似乎来自操作系统。有时样本报告的引用根本不包括我的任何代码！
我删除了大量的代码，试图看看我在初始化期间是否做了一些它不喜欢的事情，但它没有任何区别。
这里有人有任何想法吗？
2357 Thread_235557 DispatchQueue_1: com.apple.main-thread (serial)
+ 2357 ??? (in The Touch) load address 0x105044000 + 0x2224 [0x105046224]
+ 2357 ??? (in The Touch) load address 0x105044000 + 0x2252 [0x105046252]
+ 2357 NSApplicationMain (in AppKit) + 940 [0x7fff8d6cb803]
+ 2357 -[NSApplication run] (in AppKit) + 553 [0x7fff8d6e09cc]
+ 2357 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] (in AppKit) + 122 [0x7fff8d6ec8db]
+ 2357 _DPSNextEvent (in AppKit) + 1434 [0x7fff8d6ed28e]
+ 2357 _BlockUntilNextEventMatchingListInModeWithFilter (in HIToolbox) + 65 [0x7fff88e13abc]
+ 2357 ReceiveNextEventCommon (in HIToolbox) + 173 [0x7fff88e13b85]
+ 2357 RunCurrentEventLoopInMode (in HIToolbox) + 226 [0x7fff88e13f0d]
+ 2357 CFRunLoopRunSpecific (in CoreFoundation) + 309 [0x7fff8a566275]
+ 2357 __CFRunLoopRun (in CoreFoundation) + 814 [0x7fff8a5667de]
+ 2357 __CFRunLoopDoBlocks (in CoreFoundation) + 341 [0x7fff8a566ee5]
+ 2357 __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ (in CoreFoundation) + 12 [0x7fff8a5757cc]
+ 2357 ___LSScheduleNotificationFunction_block_invoke_2 (in LaunchServices) + 47 [0x7fff867bce19]
+ 2357 applicationStatusSubsystemCallback (in AppKit) + 455 [0x7fff8df524db]
+ 2357 -[NSNotificationCenter postNotificationName:object:userInfo:] (in Foundation) + 68 [0x7fff8d38e4aa]
+ 2357 _CFXNotificationPost (in CoreFoundation) + 2893 [0x7fff8a506c5d]
+ 2357 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ (in CoreFoundation) + 12 [0x7fff8a612fcc]
+ 2357 ??? (in The Touch) load address 0x105044000 + 0x4b13 [0x105048b13]
+ 2357 -[NSRunningApplication processIdentifier] (in AppKit) + 116 [0x7fff8df5616e]
+ 2357 -[NSRunningApplication _fetchDynamicProperties] (in AppKit) + 492 [0x7fff8da4abf8]
+ 2357 _LSCopyApplicationInformation (in LaunchServices) + 2469 [0x7fff867b1bfe]
+ 2357 xpc_connection_send_message_with_reply_sync (in libxpc.dylib) + 195 [0x7fff8c624733]
+ 2357 _dispatch_semaphore_wait_slow (in libdispatch.dylib) + 206 [0x7fff8834ba15]
+ 2357 semaphore_wait_trap (in libsystem_kernel.dylib) + 10 [0x7fff85b6aa56]
2348 Thread_237480 DispatchQueue_1: com.apple.main-thread (serial)
+ 2348 ??? (in The Touch) load address 0x103b6a000 + 0x2224 [0x103b6c224]
+ 2348 ??? (in The Touch) load address 0x103b6a000 + 0x2252 [0x103b6c252]
+ 2348 NSApplicationMain (in AppKit) + 940 [0x7fff8d6cb803]
+ 2348 -[NSApplication run] (in AppKit) + 646 [0x7fff8d6e0a29]
+ 2348 -[NSApplication sendEvent:] (in AppKit) + 2021 [0x7fff8d890744]
+ 2348 -[NSStatusBarWindow sendEvent:] (in AppKit) + 247 [0x7fff8d9ed11b]
+ 2348 -[NSWindow sendEvent:] (in AppKit) + 11296 [0x7fff8d8f1d08]
+ 2348 ??? (in The Touch) load address 0x103b6a000 + 0x144081 [0x103cae081]
+ 2348 -[NSApplication sendAction:to:from:] (in AppKit) + 327 [0x7fff8d90b3d0]
+ 2348 ??? (in The Touch) load address 0x103b6a000 + 0x4715 [0x103b6e715]
+ 2348 ??? (in The Touch) load address 0x103b6a000 + 0x458e [0x103b6e58e]
+ 2348 _NSSetCharValueAndNotify (in Foundation) + 270 [0x7fff8d3e7ed9]
+ 2348 ??? (in The Touch) load address 0x103b6a000 + 0xcb729 [0x103c35729]
+ 2348 ??? (in The Touch) load address 0x103b6a000 + 0xd39a3 [0x103c3d9a3]
+ 2348 -[NSApplication activateIgnoringOtherApps:] (in AppKit) + 87 [0x7fff8d886f9e]
+ 2348 -[NSApplication currentSystemPresentationOptions] (in AppKit) + 33 [0x7fff8da86a93]
+ 2348 _GetActiveSystemUIModeAndOptions (in HIToolbox) + 48 [0x7fff88f8beb8]
+ 2348 GetModeAndOptionsForProcess(__LSASN const*, unsigned int*, unsigned int*) (in HIToolbox) + 34 [0x7fff88de70d5]
+ 2348 _LSCopyApplicationInformation (in LaunchServices) + 2469 [0x7fff867b1bfe]
+ 2348 xpc_connection_send_message_with_reply_sync (in libxpc.dylib) + 195 [0x7fff8c624733]
+ 2348 _dispatch_semaphore_wait_slow (in libdispatch.dylib) + 206 [0x7fff8834ba15]
+ 2348 semaphore_wait_trap (in libsystem_kernel.dylib) + 10 [0x7fff85b6aa56]
2297 Thread_238176 DispatchQueue_1: com.apple.main-thread (serial)
+ 2297 ??? (in The Touch) load address 0x103d46000 + 0x2224 [0x103d48224]
+ 2297 ??? (in The Touch) load address 0x103d46000 + 0x2252 [0x103d48252]
+ 2297 NSApplicationMain (in AppKit) + 940 [0x7fff8d6cb803]
+ 2297 -[NSApplication run] (in AppKit) + 553 [0x7fff8d6e09cc]
+ 2297 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] (in AppKit) + 122 [0x7fff8d6ec8db]
+ 2297 _DPSNextEvent (in AppKit) + 1434 [0x7fff8d6ed28e]
+ 2297 _BlockUntilNextEventMatchingListInModeWithFilter (in HIToolbox) + 65 [0x7fff88e13abc]
+ 2297 ReceiveNextEventCommon (in HIToolbox) + 173 [0x7fff88e13b85]
+ 2297 RunCurrentEventLoopInMode (in HIToolbox) + 226 [0x7fff88e13f0d]
+ 2297 CFRunLoopRunSpecific (in CoreFoundation) + 309 [0x7fff8a566275]
+ 2297 __CFRunLoopRun (in CoreFoundation) + 776 [0x7fff8a5667b8]
+ 2297 __CFRunLoopDoObservers (in CoreFoundation) + 391 [0x7fff8a575017]
+ 2297 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ (in CoreFoundation) + 23 [0x7fff8a5750a7]
+ 2297 __83-[NSWindow _postWindowNeedsDisplayOrLayoutOrUpdateConstraintsUnlessPostingDisabled]_block_invoke1331 (in AppKit) + 46 [0x7fff8de5dcd1]
+ 2297 _handleWindowNeedsDisplayOrLayoutOrUpdateConstraints (in AppKit) + 892 [0x7fff8d8898a6]
+ 2297 _CFAutoreleasePoolPop (in CoreFoundation) + 50 [0x7fff8a52ed72]
+ 2297 (anonymous namespace)::AutoreleasePoolPage::pop(void*) (in libobjc.A.dylib) + 502 [0x7fff8e9d365a]
+ 2297 -[CIContext dealloc] (in CoreImage) + 25 [0x7fff863a9789]
+ 2297 -[CIContext invalidate] (in CoreImage) + 36 [0x7fff863a9812]
+ 2297 -[CICLContextImpl setOwner:] (in CoreImage) + 38 [0x7fff863a6a81]
+ 2297 -[CICLContextImpl invalidate] (in CoreImage) + 95 [0x7fff863a694f]
+ 2297 -[FEOpenCLContext dealloc] (in CoreImage) + 17 [0x7fff863e4ea7]
+ 2297 FEOpenCLContextFinalize(FEOpenCLContext*) (in CoreImage) + 363 [0x7fff863e4cd1]
+ 2297 _dispatch_group_wait_slow (in libdispatch.dylib) + 208 [0x7fff8834dddd]
+ 2297 semaphore_wait_trap (in libsystem_kernel.dylib) + 10 [0x7fff85b6aa56]