了解 NSZombie 日志答案

【问题标题】：Undestanding NSZombie log了解 NSZombie 日志
【发布时间】：2011-12-02 21:22:07
【问题描述】：

我正在尝试跟踪 exc-bad-access。我已经在启用 NSZombie 的情况下运行了 Instruments，当应用程序崩溃时我会收到此错误日志。有一个 UIView 会自动释放四次，但在自动释放池耗尽之前，它的引用计数仅为 3，因此 int 以 -1 引用计数结束。

我自己没有发送任何自动发布的消息，那么我该如何解决这个问题？


#   Category    Event Type  RefCt   Timestamp   Address Size    Responsible Library Responsible Caller
0   UITextView  Malloc  1   00:09.478.888   0x80c2920   448 UIKit   -[UIRuntimeConnection initWithCoder:]
1   UITextView  Retain  2   00:09.492.814   0x80c2920   0   UIKit   -[UITextView resignFirstResponder]
2   UITextView  Autorelease     00:09.492.822   0x80c2920   0   UIKit   -[UITextView resignFirstResponder]
3   UITextView  Retain  3   00:09.494.396   0x80c2920   0   UIKit   -[UIRuntimeConnection initWithCoder:]
4   UITextView  Retain  4   00:09.494.400   0x80c2920   0   Foundation  -[NSKeyedUnarchiver _replaceObject:withObject:]
5   UITextView  Release 3   00:09.494.403   0x80c2920   0   UIKit   -[UIRuntimeConnection initWithCoder:]
6   UITextView  Retain  4   00:09.494.407   0x80c2920   0   UIKit   -[UIRuntimeConnection initWithCoder:]
7   UITextView  Release 3   00:09.494.448   0x80c2920   0   UIKit   -[UIRuntimeConnection initWithCoder:]
8   UITextView  Autorelease     00:09.494.845   0x80c2920   0   UIKit   -[UIRuntimeConnection initWithCoder:]
9   UITextView  Retain  4   00:09.494.848   0x80c2920   0   UIKit   -[UIRuntimeConnection initWithCoder:]
10  UITextView  Retain  5   00:09.495.215   0x80c2920   0   Foundation  -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:]
11  UITextView  Retain  6   00:09.495.230   0x80c2920   0   Foundation  -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:]
12  UITextView  Release 5   00:09.495.241   0x80c2920   0   Foundation  -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:]
13  UITextView  Retain  6   00:09.495.255   0x80c2920   0   Foundation  -[NSArray(NSArray) initWithCoder:]
14  UITextView  Release 5   00:09.495.277   0x80c2920   0   UIKit   -[UIView initWithCoder:]
15  UITextView  Retain  6   00:09.495.325   0x80c2920   0   UIKit   -[UIView(Internal) _addSubview:positioned:relativeTo:]
16  UITextView  Release 5   00:09.499.036   0x80c2920   0   UIKit   -[UINib instantiateWithOwner:options:]
17  UITextView  Retain  6   00:09.499.306   0x80c2920   0   Foundation  -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:]
18  UITextView  Retain  7   00:09.499.325   0x80c2920   0   Foundation  -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:]
19  UITextView  Release 6   00:09.499.336   0x80c2920   0   Foundation  -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:]
20  UITextView  Retain  7   00:09.499.358   0x80c2920   0   Foundation  -[NSArray(NSArray) initWithCoder:]
21  UITextView  Release 6   00:09.499.385   0x80c2920   0   UIKit   -[UINib instantiateWithOwner:options:]
22  UITextView  Retain  7   00:09.499.511   0x80c2920   0   Proyecto3   -[EventoDetailViewControllerClass setNombreTextView:]
23  UITextView  Release 6   00:09.499.681   0x80c2920   0   Foundation  -[NSKeyedUnarchiver dealloc]
24  UITextView  Release 5   00:09.499.747   0x80c2920   0   Foundation  -[NSKeyedUnarchiver dealloc]
25  UITextView  Release 4   00:09.499.762   0x80c2920   0   Foundation  -[NSKeyedUnarchiver dealloc]
26  UITextView  Release 3   00:09.499.817   0x80c2920   0   Foundation  -[NSKeyedUnarchiver dealloc]
27  UITextView  Release 2   00:09.499.880   0x80c2920   0   UIKit   -[UIRuntimeConnection dealloc]
28  UITextView  Retain  3   00:09.534.891   0x80c2920   0   QuartzCore  -[CALayer layoutSublayers]
29  UITextView  Release 2   00:09.534.895   0x80c2920   0   QuartzCore  CALayerLayoutIfNeeded
30  UITextView  Retain  3   00:09.607.480   0x80c2920   0   UIKit   -[UIView(Hierarchy) subviews]
31  UITextView  Retain  4   00:09.607.947   0x80c2920   0   UIKit   -[UITouch(UITouchInternal) setView:]
32  UITextView  Retain  5   00:09.607.951   0x80c2920   0   UIKit   -[UITouch(UITouchInternal) setGestureView:]
33  UITextView  Retain  6   00:09.608.655   0x80c2920   0   UIKit   -[UITouch view]
34  UITextView  Autorelease     00:09.608.658   0x80c2920   0   UIKit   -[UITouchesEvent _clearViewForTouch:]
35  UITextView  Release 5   00:09.608.661   0x80c2920   0   UIKit   -[UITouch(UITouchInternal) setView:]
36  UITextView  Release 4   00:09.608.666   0x80c2920   0   UIKit   -[UITouch(UITouchInternal) setGestureView:]
37  UITextView  Release 3   00:09.608.807   0x80c2920   0   Foundation  -[NSAutoreleasePool release]
38  UITextView  Retain  4   00:09.609.307   0x80c2920   0   UIKit   -[UITouch(UITouchInternal) setView:]
39  UITextView  Retain  5   00:09.609.311   0x80c2920   0   UIKit   -[UITouch(UITouchInternal) setGestureView:]
40  UITextView  Retain  6   00:09.725.677   0x80c2920   0   UIKit   -[UITouch view]
41  UITextView  Autorelease     00:09.725.680   0x80c2920   0   UIKit   -[UITouchesEvent _clearViewForTouch:]
42  UITextView  Release 5   00:09.725.684   0x80c2920   0   UIKit   -[UITouch(UITouchInternal) setView:]
43  UITextView  Release 4   00:09.725.688   0x80c2920   0   UIKit   -[UITouch(UITouchInternal) setGestureView:]
44  UITextView  Release 3   00:09.725.839   0x80c2920   0   Foundation  -[NSAutoreleasePool release]
45  UITextView  Zombie  -1  00:11.383.459   0x80c2920   0   UIKit   -[UIView(Internal) _invalidateSubviewCache]

【问题讨论】：

标签： cocoa-touch memory-management exc-bad-access instruments nszombie

【解决方案1】：

使用 Instruments 分析泄漏时，最好忽略显示为归因于 Apple 库的任何泄漏。要调查的泄漏是那些表明源自您的应用程序代码的泄漏。

自动释放的对象在池耗尽时被释放。如果您还没有创建任何您自己的自动释放对象，那么唯一的自动释放对象必须是 Apple 自己的，例如[NSString string]。

我假设您已经运行了分析器并解决了所有突出显示的问题？如果没有，这是第一步。

接下来，查看EXC_BAD_ACCESS所在的行。它*可能*提供有关违规对象的线索。有可能 - 或其他一些 - 对象被过早释放，或者您没有充分保留它们。

当这种情况发生时，运行时会在某个时候释放它们。尝试访问它们会导致 dreadedEXC_BAD_ACCESS。

这是 Lou Franco 在EXC_BAD_ACCESS上的解释以及如何追踪它的链接：

Understanding EXC_BAD_ACCESS

【讨论】：

虽然我终于自己搞定了，但我将您的答案标记为已解决，因为分析器是导致我搞定僵尸的原因。