从表格视图中选择项目后，当我在委托回调中调用[self.navigationController popViewControllerAnimated:YES];时，我看到一个奇怪的崩溃。在Xcode中没有跟踪打印到控制台 - 但这是系统控制台中可用的堆栈 - 任何想法？
Thread 0:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x94f5e332 __kill + 10
1 libsystem_kernel.dylib 0x94f5d932 kill$UNIX2003 + 32
2 CoreFoundation 0x01c9876b CFHash + 43
3 CoreFoundation 0x01c8f8b4 __CFDictionaryStandardHashKey + 36
4 CoreFoundation 0x01cbce9c CFBasicHashRemoveValue + 1148
5 CoreFoundation 0x01cca669 CFDictionaryRemoveValue + 185
6 Foundation 0x011a3162 -[NSISEngine setIntegralizationAdjustment:forMarker:] + 50
7 Foundation 0x011a97ec -[NSISEngine removeConstraintWithMarker:] + 651
8 Foundation 0x011b388e -[NSLayoutConstraint _removeFromEngine:] + 277
9 UIKit 0x00a80d36 -[UIView(UIConstraintBasedLayout) _layoutEngine_willRemoveLayoutConstraint:] + 64
10 UIKit 0x005ac2ae __48-[UIScrollView _setAutomaticContentConstraints:]_block_invoke_0 + 181
11 Foundation 0x011a8733 -[NSISEngine withAutomaticOptimizationDisabled:] + 57
12 UIKit 0x00a80a5c -[UIView(UIConstraintBasedLayout) _withAutomaticEngineOptimizationDisabled:] + 63
13 UIKit 0x005ac1bb -[UIScrollView _setAutomaticContentConstraints:] + 122
14 UIKit 0x005ac9ca -[UIScrollView _rememberDependentConstraint:] + 123
15 UIKit 0x00a8ce60 ___updateViewDependenciesForConstraint_block_invoke_0 + 51
16 UIKit 0x00a80cee _updateViewDependenciesForConstraint + 224
17 UIKit 0x00a80bea -[UIView(UIConstraintBasedLayout) _layoutEngine_didAddLayoutConstraint:roundingAdjustment:mutuallyExclusiveConstraints:] + 202
18 UIKit 0x00a80da7 -[UIView(UIConstraintBasedLayout) _tryToAddConstraintWithoutUpdatingConstraintsArray:roundingAdjustment:mutuallyExclusiveConstraints:] + 61
19 UIKit 0x00594be4 -[UIView(Internal) _didMoveFromWindow:toWindow:] + 447
20 UIKit 0x005a081f -[UIScrollView _didMoveFromWindow:toWindow:] + 65
21 UIKit 0x0059505d -[UIView(Internal) _didMoveFromWindow:toWindow:] + 1592
22 UIKit 0x0059505d -[UIView(Internal) _didMoveFromWindow:toWindow:] + 1592
23 UIKit 0x005905e6 -[UIView(Hierarchy) _postMovedFromSuperview:] + 157
24 UIKit 0x00596af4 -[UIView(Internal) _addSubview:positioned:relativeTo:] + 1784
25 UIKit 0x0058eeed -[UIView(Hierarchy) addSubview:] + 56
26 UIKit 0x007c58a9 -[UINavigationTransitionView transition:fromView:toView:] + 513
27 UIKit 0x007c56a0 -[UINavigationTransitionView transition:toView:] + 55
28 UIKit 0x00641c61 -[UINavigationController _startTransition:fromViewController:toViewController:] + 2344
29 UIKit 0x00641eab -[UINavigationController _startDeferredTransitionIfNeeded:] + 386
30 UIKit 0x006433d6 _popViewControllerNormal + 280
31 UIKit 0x00643675 -[UINavigationController _popViewControllerWithTransition:allowPoppingLast:] + 449
32 UIKit 0x0c53b780 -[UINavigationControllerAccessibility(SafeCategory) _popViewControllerWithTransition:allowPoppingLast:] + 143
33 UIKit 0x00642625 -[UINavigationController popViewControllerAnimated:] + 57
更新
我很确定这是一个内部自动布局问题，就像这里发布的一样： Strange Crash when dismissing view controller, auto-layout to blame?
我想我会切换回支柱和弹簧......
答案 0 :(得分：4)
你试图通过站立来切割树枝：）
如果要弹出当前显示在屏幕上的视图控制器。你可以这样做：
[self.navigationController popViewControllerAnimated:YES];
答案 1 :(得分：2)
你在哪里调用了委托，之后就可以调用
[self.navigationController popViewControllerAnimated:YES]
转到上一个控制器，但如果你必须转到不同的控制器，那么获取该控制器的引用并使用
[self.navigationController popToViewController:referenceOfYourVC animated:YES]
答案 2 :(得分：2)
[self.navigationController popViewControllerAnimated:YES];
上面的代码不应该带来错误但是你从堆栈弹出一个视图，视图的dealloc方法会自动调用。我相信您可能有一些与内存相关的问题，或者您正在视图的dealloc方法中释放一些零保留计数对象。
答案 3 :(得分：0)
是的问题是自动布局的某种错误/问题。我不确定它是什么，但我在其他地方遇到系统添加的控件（比如UISearchBar上的取消按钮）。我将整个项目转换为struts，它适用于所有相同的代码。
我会等到转换回来之前自动布局已经有一段时间了。
Strange Crash when dismissing view controller, auto-layout to blame?