iOS上的堆栈跟踪解释

有人能帮我弄清楚下面的线索吗？我很想知道问题来自哪个UIViewController，以便我可以查明问题：

0 libobjc.A.dylib 0x31576f78 objc_msgSend + 15
1 CoreFoundation 0x3168b3fd -[NSObject performSelector:withObject:withObject:] + 52
2 UIKit 0x31a9c6a1 -[UIApplication sendAction:fromSender:toTarget:forEvent:] + 64
3 UIKit 0x31a9c65b -[UIControl(Deprecated) sendAction:toTarget:forEvent:] + 46
4 UIKit 0x31a466a9 -[UIControl(Internal) _sendActionsForEventMask:withEvent:] + 488
5 UIKit 0x31a4516d -[UIFieldEditor becomeFieldEditorForView:] + 168
6 UIKit 0x31a44a9d -[UITextField _becomeFirstResponder] + 96
7 UIKit 0x3196291d -[UIResponder becomeFirstResponder] + 336
8 UIKit 0x31a614a7 -[UITextInteractionAssistant setFirstResponderIfNecessary] + 174
9 UIKit 0x31a60d71 -[UITextInteractionAssistant oneFingerTap:] + 1608
10 UIKit 0x31a60637 _UIGestureRecognizerSendActions + 106
11 UIKit 0x319f0d65 -[UIGestureRecognizer _updateGestureWithEvent:] + 304
12 UIKit 0x31c21479 ___UIGestureRecognizerUpdate_block_invoke_0541 + 48
13 UIKit 0x3196cf55 _UIGestureRecognizerApplyBlocksToArray + 176
14 UIKit 0x3196baa3 _UIGestureRecognizerUpdate + 898
15 UIKit 0x319787e9 _UIGestureRecognizerUpdateGesturesFromSendEvent + 28
16 UIKit 0x31978627 -[UIWindow _sendGesturesForEvent:] + 774
17 UIKit 0x319781f5 -[UIWindow sendEvent:] + 88
18 UIKit 0x3195e695 -[UIApplication sendEvent:] + 356
19 UIKit 0x3195df3b _UIApplicationHandleEvent + 5826
20 GraphicsServices 0x32b6122b PurpleEventCallback + 882
21 CoreFoundation 0x31705523 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 38
22 CoreFoundation 0x317054c5 __CFRunLoopDoSource1 + 140
23 CoreFoundation 0x31704313 __CFRunLoopRun + 1370
24 CoreFoundation 0x316874a5 CFRunLoopRunSpecific + 300
25 CoreFoundation 0x3168736d CFRunLoopRunInMode + 104
26 GraphicsServices 0x32b60439 GSEventRunModal + 136
27 UIKit 0x3198ccd5 UIApplicationMain + 1080
28 MyApp 0x000aa96b _mh_execute_header + 14699

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根据堆栈跟踪，我们可以推断用户在文本字段上点击了手指。如果您的应用程序中只有一个文本字段，那么您现在就知道涉及哪个UI元素，并且可以从中推断出涉及哪个视图控制器

我们还可以看到文本字段正在发送其作为第一响应者的操作。如果应用程序中只有一个文本字段具有“Editing Did Begin”（

uicontrolEventEditingDid Begin

）事件的目标和操作，则您现在知道涉及哪个UI元素，并且可以由此推断涉及哪个视图控制器

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否则，您无法从堆栈跟踪中分辨出涉及哪个视图控制器。

“我很想知道问题源自哪个UIViewController”谢谢，这确实在一定程度上帮助我隔离了问题。