我们偶尔会得到以下内容。我们无法重新创建此错误。
有谁知道具体原因是什么？看起来UITableView处于一些奇怪的状态。我已经运行了仪器寻找过度释放的内存等，但我看不到多少。
Thread 0 Crashed:
libobjc.A.dylib 0x3068f06b _objc_terminate + 103
libstdc++.6.dylib 0x30502e3d __cxxabiv1::__terminate(void (*)()) + 53
libstdc++.6.dylib 0x30502e91 std::terminate() + 17
libstdc++.6.dylib 0x30502f61 __cxa_throw + 85
libobjc.A.dylib 0x3068dc8b objc_exception_throw + 71
CoreFoundation 0x335141bf -[NSObject(NSObject) doesNotRecognizeSelector:] + 103
CoreFoundation 0x33513649 ___forwarding___ + 509
CoreFoundation 0x3348a180 _CF_forwarding_prep_0 + 48
UIKit 0x31bb2ff3 -[UITableViewRowData(UITableViewRowDataPrivate) _updateNumSections] + 67
UIKit 0x31bb2f53 -[UITableViewRowData invalidateAllSections] + 51
UIKit 0x31bb2d09 -[UITableView(_UITableViewPrivate) _updateRowData] + 65
UIKit 0x31bafab7 -[UITableView _rectChangedWithNewSize:oldSize:] + 111
UIKit 0x31bae833 -[UITableView setFrame:] + 159
UIKit 0x31bb5e0f -[UIView(Geometry) resizeWithOldSuperviewSize:] + 275
UIKit 0x31b820bd -[UIView(Geometry) resizeSubviewsWithOldSize:] + 121
UIKit 0x31b674e9 -[UIView(Geometry) setFrame:] + 337
UIKit 0x31bb5e0f -[UIView(Geometry) resizeWithOldSuperviewSize:] + 275
UIKit 0x31b820bd -[UIView(Geometry) resizeSubviewsWithOldSize:] + 121
UIKit 0x31b674e9 -[UIView(Geometry) setFrame:] + 337
UIKit 0x31bae9fd -[UIScrollView setFrame:] + 421
UIKit 0x31bb5e0f -[UIView(Geometry) resizeWithOldSuperviewSize:] + 275
UIKit 0x31b820bd -[UIView(Geometry) resizeSubviewsWithOldSize:] + 121
UIKit 0x31b674e9 -[UIView(Geometry) setFrame:] + 337
UIKit 0x31bb5e0f -[UIView(Geometry) resizeWithOldSuperviewSize:] + 275
UIKit 0x31b820bd -[UIView(Geometry) resizeSubviewsWithOldSize:] + 121
UIKit 0x31b674e9 -[UIView(Geometry) setFrame:] + 337
UIKit 0x31bb9193 -[UIViewControllerWrapperView setFrame:] + 63
UIKit 0x31bb5e0f -[UIView(Geometry) resizeWithOldSuperviewSize:] + 275
UIKit 0x31b820bd -[UIView(Geometry) resizeSubviewsWithOldSize:] + 121
UIKit 0x31b674e9 -[UIView(Geometry) setFrame:] + 337
UIKit 0x31bb5e0f -[UIView(Geometry) resizeWithOldSuperviewSize:] + 275
UIKit 0x31b820bd -[UIView(Geometry) resizeSubviewsWithOldSize:] + 121
UIKit 0x31b674e9 -[UIView(Geometry) setFrame:] + 337
UIKit 0x31b9922f -[UILayoutContainerView setFrame:] + 55
UIKit 0x31bb90a9 +[UIViewControllerWrapperView wrapperViewForView:frame:] + 225
UIKit 0x31bd6201 -[UITabBarController transitionFromViewController:toViewController:transition:shouldSetSelected:] + 105
UIKit 0x31bd618d -[UITabBarController transitionFromViewController:toViewController:] + 33
UIKit 0x31bd5a33 -[UITabBarController _setSelectedViewController:] + 187
UIKit 0x31c5aceb -[UITabBarController setSelectedViewController:] + 15
UIKit 0x31c5abe7 -[UITabBarController _tabBarItemClicked:] + 227
CoreFoundation 0x33480571 -[NSObject(NSObject) performSelector:withObject:withObject:] + 25
UIKit 0x31b7eec9 -[UIApplication sendAction:to:from:forEvent:] + 85
UIKit 0x31b7ee69 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 33
UIKit 0x31c5aa8b -[UITabBar _sendAction:withEvent:] + 271
CoreFoundation 0x33480571 -[NSObject(NSObject) performSelector:withObject:withObject:] + 25
UIKit 0x31b7eec9 -[UIApplication sendAction:to:from:forEvent:] + 85
UIKit 0x31b7ee69 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 33
UIKit 0x31b7ee3b -[UIControl sendAction:to:forEvent:] + 39
UIKit 0x31b7eb8d -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 357
UIKit 0x31bb8bd9 -[UIControl sendActionsForControlEvents:] + 17
UIKit 0x31c5a815 -[UITabBar(Static) _buttonUp:] + 81
CoreFoundation 0x33480571 -[NSObject(NSObject) performSelector:withObject:withObject:] + 25
UIKit 0x31b7eec9 -[UIApplication sendAction:to:from:forEvent:] + 85
UIKit 0x31b7ee69 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 33
UIKit 0x31b7ee3b -[UIControl sendAction:to:forEvent:] + 39
UIKit 0x31b7eb8d -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 357
UIKit 0x31b7f423 -[UIControl touchesEnded:withEvent:] + 343
UIKit 0x31b7dbf5 -[UIWindow _sendTouchesForEvent:] + 369
UIKit 0x31b7d56f -[UIWindow sendEvent:] + 263
UIKit 0x31b66313 -[UIApplication sendEvent:] + 299
UIKit 0x31b65c53 _UIApplicationHandleEvent + 5091
GraphicsServices 0x311a5e77 PurpleEventCallback + 667
CoreFoundation 0x334e7a97 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 27
CoreFoundation 0x334e983f __CFRunLoopDoSource1 + 167
CoreFoundation 0x334ea60d __CFRunLoopRun + 521
CoreFoundation 0x3347aec3 CFRunLoopRunSpecific + 231
CoreFoundation 0x3347adcb CFRunLoopRunInMode + 59
GraphicsServices 0x311a541f GSEventRunModal + 115
GraphicsServices 0x311a54cb GSEventRun + 63
UIKit 0x31b90d69 -[UIApplication _run] + 405
UIKit 0x31b8e807 UIApplicationMain + 671
MyApp 0x0009a188 main (main.m:5)
答案 0 :(得分：3)
首先查看您的控制台日志。将显示一条消息，指出已发送哪个班级updateNumSections。
确保您没有在后台线程上调用此表视图。这可能导致这些疯狂的崩溃。
确保表视图数据源未在表视图之前解除分配。
这里的怀疑是过度释放（正如你的建议），所以运行静态分析只是为了找到骨头的东西。还要确保使用访问器而不是直接使用ivars（过度发布的第一个原因）。
答案 1 :(得分：0)
我遇到了同样的问题，就像你在Rob Napier的评论中所建议的那样，它应该在tabBarController而不是viewDidDisappear上实现。
在乐器中运行Zombies将向您显示对取消分配对象的updateNumSections调用。
对于查找此问题的任何人，以下是您应该在tabViewController中使用的代码，给定一个在不再显示的选项卡中调用的navigationViewController。
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController {
//Always go to the root controller when accessing a tab.
//If any navigation controller that must remember its last state, change this for viewController == or !=
if ([viewController isKindOfClass:[UINavigationController class]]) {
[(UINavigationController*)viewController popToRootViewControllerAnimated:YES]; //Do not use code on disappear, instead popToRoot on tab selection
}
}
答案 2 :(得分：0)
我很确定我不会在后台线程上更新表视图。
谢谢@Pierre-Francoys，我添加了一个Zombies Option，它告诉我发送给解除分配对象的选择器numberOfSectionsInTableView:。所以我在viewController中清除tableView的dataSource和delegate。而且效果很好。
- (void)dealloc {
_tableView.dataSource = nil;
_tableView.delegate = nil;
}