【发布时间】：2015-08-21 07:54:29
【问题描述】：
我有自己的聊天窗口，类似于 Apple 消息屏幕。有一种情况是我在群聊中聊天，群主从其他设备上删除了该群。在这种情况下，我要做的是删除所有消息并显示做[self.navigationController popToRootViewControllerAnimated:YES];，然后在下一行显示这样的警报视图
UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Group deleted" message:@"The group is deleted" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
现在，如果我在导航回 rootViewController 并在 UIAlertview 中按 OK 时打开键盘，然后应用程序在控制台 [ResponderView _responderWindow]: message sent to deallocated instance 0x16312440 和分析僵尸工具 An Objective-C message was sent to a deallocated 'ResponderView' object（僵尸) 在地址：0x18a89aa0` 和回溯是这样的
thread #1: tid = 0x1aa279, 0x2abf5272 CoreFoundation`___forwarding___ + 534, queue = 'com.apple.main-thread', stop reason = EXC_BREAKPOINT (code=EXC_ARM_BREAKPOINT, subcode=0xdefe)
* frame #0: 0x2abf5272 CoreFoundation`___forwarding___ + 534
frame #1: 0x2ab24e78 CoreFoundation`_CF_forwarding_prep_0 + 24
frame #2: 0x2e26a728 UIKit`-[UIView(Internal) _firstResponder] + 20
frame #3: 0x2e26a708 UIKit`-[UIResponder isFirstResponder] + 24
frame #4: 0x2e9075a8 UIKit`-[UITextView _keyboardDidShow:] + 24
frame #5: 0x2aba9e08 CoreFoundation`__CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
frame #6: 0x2ab04514 CoreFoundation`_CFXNotificationPost + 1784
frame #7: 0x2b866748 Foundation`-[NSNotificationCenter postNotificationName:object:userInfo:] + 72
frame #8: 0x2e8d4706 UIKit`-[UIInputWindowController postEndNotifications:withInfo:] + 554
frame #9: 0x2e8d55dc UIKit`-[UIInputWindowController mergeTransitionIfNecessaryWithTransition:] + 244
frame #10: 0x2e8d575c UIKit`-[UIInputWindowController moveFromPlacement:toPlacement:starting:completion:] + 92
frame #11: 0x2e8d9410 UIKit`-[UIInputWindowController setPlacement:starting:completion:] + 48
frame #12: 0x2e8d9004 UIKit`-[UIInputWindowController setInputViewSet:] + 624
frame #13: 0x2e8d54ce UIKit`-[UIInputWindowController performOperations:withAnimationStyle:] + 38
frame #14: 0x2e324f40 UIKit`-[UIPeripheralHost(UIKitInternal) setInputViews:animationStyle:] + 1012
frame #15: 0x2e341b86 UIKit`-[UIPeripheralHost(UIKitInternal) _restoreInputViewsWithId:animated:] + 590
frame #16: 0x2e604b6e UIKit`-[UIAlertController _restoreInputViewsAnimated:] + 114
frame #17: 0x2e60496c UIKit`-[UIAlertController viewDidDisappear:] + 76
frame #18: 0x2e2846c0 UIKit`-[UIViewController _setViewAppearState:isAnimating:] + 364
frame #19: 0x2e284c12 UIKit`-[UIViewController _endAppearanceTransition:] + 290
frame #20: 0x2e543eb2 UIKit`-[UIPresentationController transitionDidFinish:] + 862
frame #21: 0x2e546172 UIKit`__56-[UIPresentationController runTransitionForCurrentState]_block_invoke_2 + 150
frame #22: 0x2e37f31e UIKit`-[_UIViewControllerTransitionContext completeTransition:] + 102
frame #23: 0x2e2a2cc0 UIKit`-[UIViewAnimationBlockDelegate _didEndBlockAnimation:finished:context:] + 308
frame #24: 0x2e2a28dc UIKit`-[UIViewAnimationState sendDelegateAnimationDidStop:finished:] + 184
frame #25: 0x2e2a27ee UIKit`-[UIViewAnimationState animationDidStop:finished:] + 66
frame #26: 0x2dc86960 QuartzCore`CA::Layer::run_animation_callbacks(void*) + 236
frame #27: 0x0150915e libdispatch.dylib`_dispatch_client_callout + 22
frame #28: 0x0150ce44 libdispatch.dylib`_dispatch_main_queue_callback_4CF + 1512
frame #29: 0x2abb7608 CoreFoundation`__CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 8
frame #30: 0x2abb5d08 CoreFoundation`__CFRunLoopRun + 1512
frame #31: 0x2ab02200 CoreFoundation`CFRunLoopRunSpecific + 476
frame #32: 0x2ab02012 CoreFoundation`CFRunLoopRunInMode + 106
frame #33: 0x325d3200 GraphicsServices`GSEventRunModal + 136
frame #34: 0x2e2cea08 UIKit`UIApplicationMain + 1440
frame #35: 0x000faeec JonglaIM`main(argc=9, argv=0x0129e9b4) + 108 at main.m:16
如果键盘关闭，然后我 popToRootViewController 然后单击 UIAlertBox OK 按钮，则不会发生这种情况
【问题讨论】：
标签： ios objective-c memory-management crash uiresponder