我从TestFlight收到了这个崩溃报告，但是我无法在自己的环境中复制崩溃，而且从堆栈跟踪中看起来根本没有引用我自己的代码。找到跳转点的任何帮助都会有所帮助，即使这只是关于如何自己解决问题的建议。
错误：信号未知
0 MyApp 0x000f3e96 testflight_backtrace + 142
1 MyApp 0x000f4a24 TFSignalHandler + 212
2 libsystem_c.dylib 0x36dbe7ec _sigtramp + 48
3 UIKit 0x32100f0e -[UIImageView(UIImageViewInternal) _canDrawContent] + 78
4 UIKit 0x320e530c -[UIView(Internal) _didMoveFromWindow:toWindow:] + 940
5 UIKit 0x320e5108 -[UIView(Internal) _didMoveFromWindow:toWindow:] + 424
6 UIKit 0x320e5108 -[UIView(Internal) _didMoveFromWindow:toWindow:] + 424
7 UIKit 0x3210a8e2 -[UIScrollView _didMoveFromWindow:toWindow:] + 54
8 UIKit 0x320e5108 -[UIView(Internal) _didMoveFromWindow:toWindow:] + 424
9 UIKit 0x320e5108 -[UIView(Internal) _didMoveFromWindow:toWindow:] + 424
10 UIKit 0x320e5108 -[UIView(Internal) _didMoveFromWindow:toWindow:] + 424
11 UIKit 0x320e5108 -[UIView(Internal) _didMoveFromWindow:toWindow:] + 424
12 UIKit 0x320e5108 -[UIView(Internal) _didMoveFromWindow:toWindow:] + 424
13 UIKit 0x320e4eec -[UIView(Hierarchy) _postMovedFromSuperview:] + 140
14 UIKit 0x320e59b4 -[UIView(Internal) _addSubview:positioned:relativeTo:] + 1168
15 UIKit 0x320e551e -[UIView(Hierarchy) addSubview:] + 30
16 UIKit 0x3217c1a4 -[UITransitionView transition:fromView:toView:] + 980
17 UIKit 0x3217bdc8 -[UITransitionView transition:toView:] + 104
18 UIKit 0x3217b994 -[UITabBarController transitionFromViewController:toViewController:transition:shouldSetSelected:] + 524
19 UIKit 0x3217b782 -[UITabBarController transitionFromViewController:toViewController:] + 30
20 UIKit 0x3217b0bc -[UITabBarController _setSelectedViewController:] + 300
21 UIKit 0x322045d8 -[UITabBarController _tabBarItemClicked:] + 344
22 CoreFoundation 0x3501e3fc -[NSObject performSelector:withObject:withObject:] + 52
23 UIKit 0x320fdfae -[UIApplication sendAction:to:from:forEvent:] + 62
24 UIKit 0x320fdf6a -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 30
25 UIKit 0x3220445c -[UITabBar _sendAction:withEvent:] + 352
26 CoreFoundation 0x3501e3fc -[NSObject performSelector:withObject:withObject:] + 52
27 UIKit 0x320fdfae -[UIApplication sendAction:to:from:forEvent:] + 62
28 UIKit 0x320fdf6a -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 30
29 UIKit 0x320fdf48 -[UIControl sendAction:to:forEvent:] + 44
30 UIKit 0x320fdcb8 -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 492
31 UIKit 0x322041ec -[UITabBar(Static) _buttonUp:] + 116
32 CoreFoundation 0x3501e3fc -[NSObject performSelector:withObject:withObject:] + 52
33 UIKit 0x320fdfae -[UIApplication sendAction:to:from:forEvent:] + 62
34 UIKit 0x320fdf6a -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 30
35 UIKit 0x320fdf48 -[UIControl sendAction:to:forEvent:] + 44
36 UIKit 0x320fdcb8 -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 492
37 UIKit 0x320fe5f0 -[UIControl touchesEnded:withEvent:] + 476
38 UIKit 0x320fcad2 -[UIWindow _sendTouchesForEvent:] + 318
39 UIKit 0x320fc4c0 -[UIWindow sendEvent:] + 380
40 UIKit 0x320e283c -[UIApplication sendEvent:] + 356
41 UIKit 0x320e20e2 _UIApplicationHandleEvent + 5826
42 GraphicsServices 0x3631722a PurpleEventCallback + 882
43 CoreFoundation 0x35098522 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 38
44 CoreFoundation 0x350984c4 __CFRunLoopDoSource1 + 140
45 CoreFoundation 0x35097312 __CFRunLoopRun + 1370
46 CoreFoundation 0x3501a4a4 CFRunLoopRunSpecific + 300
47 CoreFoundation 0x3501a36c CFRunLoopRunInMode + 104
48 GraphicsServices 0x36316438 GSEventRunModal + 136
49 UIKit 0x32110e7c UIApplicationMain + 1080
50 WiseLaw 0x0009365e main (main.m:14)
51 WiseLaw 0x00093617 start + 39
答案 0 :(得分：1)
作为一个模糊的提示，可能是在UITabViewController中选择一个选项卡并随后绘制UIImageView时引起的。也许你在某个地方引用了一个僵尸对象。
您拥有的堆栈跟踪没有多大帮助，尝试从设备获取原始的iOS崩溃报告。崩溃也可能是在另一个线程上触发的。
您可能希望尝试基于PLCrashReporter框架的崩溃报告解决方案，该框架将向您显示所有线程并显示Last Exception Backtrace，如果崩溃实际上是由异常引起并重新抛入另一个runloop。项目页面显示了一些基于它的开源和托管解决方案：http://code.google.com/p/plcrashreporter/
答案 1 :(得分：1)
这些链接可能有助于解决崩溃
http://www.raywenderlich.com/10209/my-app-crashed-now-what-part-1
http://www.raywenderlich.com/10505/my-app-crashed-now-what-part-2
尝试使用DDLog而不是nslog，它有助于跟踪错误
DDLog示例代码的链接：=