我可以在 xcode 4.5 中用符号表示我的崩溃日志，最后一行除外。特别是崩溃日志中“Last Exception Backtrace”的第 29 行和“Thread 0”区域中的第 15 行没有显示对象或方法调用，而其他所有行都显示。我的代码是 CoachMe1。
关于为什么会这样的任何想法？
这是符号化代码：
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Crashed Thread: 0
Last Exception Backtrace:
0 CoreFoundation 0x3165929e __exceptionPreprocess + 158
1 libobjc.A.dylib 0x355af97a objc_exception_throw + 26
2 CoreFoundation 0x316591c0 +[NSException raise:format:] + 100
3 Foundation 0x34a9ece2 -[NSKeyedUnarchiver initForReadingWithData:] + 2402
4 CoachMe1 0x000047b6 -[CoachMe1ViewController viewWillAppear:] (CoachMe1ViewController.m:322)
5 UIKit 0x32b7531c -[UIViewController _setViewAppearState:isAnimating:] + 132
6 UIKit 0x32b817a0 -[UINavigationController _startTransition:fromViewController:toViewController:] + 536
7 UIKit 0x32b814ac -[UINavigationController _startDeferredTransitionIfNeeded:] + 320
8 UIKit 0x32b6fb8e -[UINavigationController pushViewController:transition:forceImmediate:] + 854
9 UIKit 0x32b6f82e -[UINavigationController pushViewController:animated:] + 34
10 CoachMe1 0x000183da -[FrontPageViewController loadGameDashboard] (FrontPageViewController.m:38)
11 UIKit 0x32bf90a8 -[UIApplication sendAction:to:from:forEvent:] + 68
12 UIKit 0x32bf905a -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 26
13 UIKit 0x32bf9038 -[UIControl sendAction:to:forEvent:] + 40
14 UIKit 0x32bf88ee -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 498
15 UIKit 0x32bf8de4 -[UIControl touchesEnded:withEvent:] + 484
16 UIKit 0x32b215f4 -[UIWindow _sendTouchesForEvent:] + 520
17 UIKit 0x32b0e804 -[UIApplication sendEvent:] + 376
18 UIKit 0x32b0e11e _UIApplicationHandleEvent + 6150
19 GraphicsServices 0x3085459e _PurpleEventCallback + 586
20 GraphicsServices 0x308541ce PurpleEventCallback + 30
21 CoreFoundation 0x3162e16e __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 30
22 CoreFoundation 0x3162e112 __CFRunLoopDoSource1 + 134
23 CoreFoundation 0x3162cf94 __CFRunLoopRun + 1380
24 CoreFoundation 0x3159feb8 CFRunLoopRunSpecific + 352
25 CoreFoundation 0x3159fd44 CFRunLoopRunInMode + 100
26 GraphicsServices 0x308532e6 GSEventRunModal + 70
27 UIKit 0x32b622fc UIApplicationMain + 1116
28 CoachMe1 0x0000257e main (main.m:14)
29 CoachMe1 0x00002538 0x1000 + 5432
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 libsystem_kernel.dylib 0x3934f350 __pthread_kill + 8
1 libsystem_c.dylib 0x33cb111e pthread_kill + 54
2 libsystem_c.dylib 0x33ced96e abort + 90
3 libc++abi.dylib 0x30803d4a abort_message + 70
4 libc++abi.dylib 0x30800ff4 _ZL17default_terminatev + 20
5 libobjc.A.dylib 0x355afa74 _ZL15_objc_terminatev + 144
6 libc++abi.dylib 0x30801078 _ZL19safe_handler_callerPFvvE + 76
7 libc++abi.dylib 0x30801110 std::terminate() + 16
8 libc++abi.dylib 0x30802594 __cxa_rethrow + 84
9 libobjc.A.dylib 0x355af9cc objc_exception_rethrow + 8
10 CoreFoundation 0x3159ff1c CFRunLoopRunSpecific + 452
11 CoreFoundation 0x3159fd44 CFRunLoopRunInMode + 100
12 GraphicsServices 0x308532e6 GSEventRunModal + 70
13 UIKit 0x32b622fc UIApplicationMain + 1116
14 CoachMe1 0x0000257e main (main.m:14)
15 CoachMe1 0x00002538 0x1000 + 5432