Xcode 在iOS 13上按下新视图后，“后退”按钮崩溃
我有一个应用程序在iOS 12上运行得非常完美。我想在iOS 13，XCode 11上进行测试。我使用情节提要导航序列将一个视图控制器推到另一个视图控制器。当我按下第二页上的后退按钮（默认后退按钮）时，应用程序崩溃并产生下面的错误。它发生在每个导航页面，甚至是空视图中Xcode 在iOS 13上按下新视图后，“后退”按钮崩溃,xcode,ios13,xcode11,Xcode,Ios13,Xcode11,我有一个应用程序在iOS 12上运行得非常完美。我想在iOS 13，XCode 11上进行测试。我使用情节提要导航序列将一个视图控制器推到另一个视图控制器。当我按下第二页上的后退按钮（默认后退按钮）时，应用程序崩溃并产生下面的错误。它发生在每个导航页面，甚至是空视图中 2019-08-28 14:10:48.632540+0300 App Name[28453:400531] *** Assertion failure in -[UINavigationController _popNaviga
2019-08-28 14:10:48.632540+0300 App Name[28453:400531] *** Assertion failure in -[UINavigationController _popNavigationBar:item:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKitCore_Sim/UIKit-3899.13.11/UINavigationController.m:8520
2019-08-28 14:10:48.642352+0300 App Name[28453:400531] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Override of -navigationBar:shouldPopItem: returned YES after manually popping a view controller (navigationController=<UINavigationController: 0x7fa22f0de000>)'
*** First throw call stack:
(
0 CoreFoundation 0x00007fff23afdbde __exceptionPreprocess + 350
1 libobjc.A.dylib 0x00007fff5015cb20 objc_exception_throw + 48
2 CoreFoundation 0x00007fff23afd958 +[NSException raise:format:arguments:] + 88
3 Foundation 0x00007fff255506f5 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 191
4 UIKitCore 0x00007fff46812310 -[UINavigationController _popNavigationBar:item:] + 379
5 UIKitCore 0x00007fff46592209 -[UINavigationBar _sendNavigationPopForBackBarButtonItem:] + 277
6 UIKitCore 0x00007fff465bf771 -[_UINavigationBarContentView __backButtonAction:] + 58
7 UIKitCore 0x00007fff46f0abc1 -[UIApplication sendAction:to:from:forEvent:] + 83
8 UIKitCore 0x00007fff468fc3e5 -[UIControl sendAction:to:forEvent:] + 223
9 UIKitCore 0x00007fff468fc72f -[UIControl _sendActionsForEvents:withEvent:] + 398
10 UIKitCore 0x00007fff468fc892 -[UIControl _sendActionsForEvents:withEvent:] + 753
11 UIKitCore 0x00007fff468fb68e -[UIControl touchesEnded:withEvent:] + 481
12 UIKitCore 0x00007fff46f450c7 -[UIWindow _sendTouchesForEvent:] + 2604
13 UIKitCore 0x00007fff46f469ce -[UIWindow sendEvent:] + 4596
14 UIKitCore 0x00007fff46f2204f -[UIApplication sendEvent:] + 356
15 UIKitCore 0x00007fff46fa18c0 __dispatchPreprocessedEventFromEventQueue + 6847
16 UIKitCore 0x00007fff46fa4386 __handleEventQueueInternal + 5980
17 CoreFoundation 0x00007fff23a60ac1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
18 CoreFoundation 0x00007fff23a609ec __CFRunLoopDoSource0 + 76
19 CoreFoundation 0x00007fff23a601c4 __CFRunLoopDoSources0 + 180
20 CoreFoundation 0x00007fff23a5aecf __CFRunLoopRun + 1263
21 CoreFoundation 0x00007fff23a5a6b6 CFRunLoopRunSpecific + 438
22 GraphicsServices 0x00007fff38016bb0 GSEventRunModal + 65
23 UIKitCore 0x00007fff46f0990f UIApplicationMain + 1621
24 App Name 0x000000010691b810 main + 112
25 libdyld.dylib 0x00007fff50fe1cf5 start + 1
26 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
2019-08-28 14:10:48.632540+0300应用程序名[28453:400531]***-[UINavigationController\u popNavigationBar:item:]，/BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKitCore\u Sim/UIKit-3899.13.11/UINavigationController.m:8520中的断言失败
2019-08-28 14:10:48.642352+0300应用程序名称[28453:400531]***由于未捕获的异常“nSinternalinconsistenceexception”而终止应用程序，原因：“覆盖-navigationBar:ShouldPopiItem:在手动弹出视图控制器（navigationController=）后返回YES”
***第一次抛出调用堆栈：
(
0 CoreFoundation 0x00007FFF23AFDBE例外预处理+350
1 libobjc.A.dylib 0x00007fff5015cb20 objc_异常_抛出+48
2 CoreFoundation 0x00007fff23afd958+[N异常提升：格式：参数：][88
3基金会0x000 7FFF255506F5- [ NSRealStutsHuffer-HuffLeuluIn方法：对象：文件：文件号：描述：] + 191
4 UIKitCore 0x00007fff46812310-[UINavigationController\u popNavigationBar:项：:+379
5 UIKitCore 0x00007FFF4659209-[UINavigationBar _sendNavigationPopforBackbarButtonim:+277
6 UIKitCore 0x00007fff465bf771-[\u UINavigationBarContentView\u backButtonAction:][58
7 UIKitCore 0x00007fff46f0abc1-[UIApplication sendAction:to:from:forEvent:+83
8 UIKitCore 0x00007fff468fc3e5-[UIControl发送操作：发送到：forEvent:+223
9 UIKitCore 0x00007fff468fc72f-[UIControl\u发送操作预防：带事件：][398
10 UIKitCore 0x00007fff468fc892-[UIControl\u发送操作预防：withEvent:+753
11 UIKitCore 0x00007fff468fb68e-[UIControl触摸已选择：带事件：][481
12 UIKitCore 0x00007fff46f450c7-[UIWindow\u sendTouchesForEvent:+2604
13 UIKitCore 0x00007fff46f469ce-[UIWindow sendEvent::+4596
14 UIKitCore 0x00007fff46f2204f-[UIApplication sendEvent:][356
15 UIKitCore 0x00007fff46fa18c0 uuu调度预处理版本RomeventQueue+6847
16 UIKitCore 0x00007fff46fa4386 _uhandleeventqueueinternal+5980
17 CoreFoundation 0x00007fff23a60ac1\uuuu CFRUNLOOP\u正在调用\uu OUT\u以执行\uuu功能\uuuu+17
18 CoreFoundation 0x00007fff23a609ec__CFRunLoopDoSource0+76
19 CoreFoundation 0x00007fff23a601c4__CFRunLoopDoSources0+180
20 CoreFoundation 0x00007fff23a5aecf__CFRunLoopRun+1263
21 CoreFoundation 0x00007fff23a5a6b6 CFRunLoopRunSpecific+438
22图形服务0x00007fff38016bb0 GSEventRunModal+65
23 UIKitCore 0x00007fff46f0990f UIApplicationMain+1621
24应用程序名称0x000000010691b810 main+112
25 libdyld.dylib 0x00007fff50fe1cf5开始+1
26？？？0x0000000000000001 0x0+1
)
libc++abi.dylib:以NSException类型的未捕获异常终止
（lldb）
UINavigationControllerUINavigationBarDelegateUINavigationController class MyNavigationController: UINavigationController {
override func viewDidLoad() {
super.viewDidLoad()
self.navigationBar.delegate = self
}
}
extension MyNavigationController : UINavigationBarDelegate {
public func navigationBar(_ navigationBar: UINavigationBar, shouldPop item: UINavigationItem) -> Bool {
return true
}
}
我不知道这对你来说是否仍然是一个问题，但我有一个类似的问题（实际上我的问题是它在ios13上工作得很好，但在ios12上“后退”按钮不起作用） 错误告诉您不能手动弹出viewcontroller，然后返回true（即，您应该弹出viewcontroller），因此如果手动弹出，则需要返回false
override public func navigationBar(_ navigationBar: UINavigationBar, shouldPop item: UINavigationItem) -> Bool {
popViewController(animated: true)
return false
}
您是否覆盖了UINavigationBar的
shouldPopItem