iOS13 崩溃 -[UIWindowScene _enumerateWindowsInclusionInternalWindows :onlyVisibleWindows:asCopy:stopped:withBlock:]?

Question

自从 iOS 13.0 发布以来，我在我们的应用程序中发现了很多此类崩溃的情况:

Fatal Exception: NSRangeException
0  CoreFoundation                 0x1846cf278 __exceptionPreprocess
1  libobjc.A.dylib                0x1843f80a4 objc_exception_throw
2  Foundation                     0x184998480 -[NSConcretePointerArray dealloc]
3  UIKitCore                      0x1888da3b8 -[UIWindowScene _enumerateWindowsIncludingInternalWindows:onlyVisibleWindows:asCopy:stopped:withBlock:]
4  UIKitCore                      0x1888d9f74 -[UIWindowScene _topVisibleWindowPassingTest:]
5  UIKitCore                      0x1886fc4c4 +[UIWindow _hitTestToPoint:forEvent:windowServerHitTestWindow:]
6  UIKitCore                      0x1886fc854 -[UIWindow _targetWindowForPathIndex:atPoint:forEvent:windowServerHitTestWindow:]
7  UIKitCore                      0x18873c080 ____updateTouchesWithDigitizerEventAndDetermineIfShouldSend_block_invoke.52
8  UIKitCore                      0x18874b738 _UIEventHIDEnumerateChildren
9  UIKitCore                      0x18873f8d0 __dispatchPreprocessedEventFromEventQueue
10 UIKitCore                      0x188742dc4 __handleEventQueueInternal
11 UIKitCore                      0x18873bc38 __handleHIDEventFetcherDrain
12 CoreFoundation                 0x18464d090 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__
13 CoreFoundation                 0x18464cfe8 __CFRunLoopDoSource0
14 CoreFoundation                 0x18464c780 __CFRunLoopDoSources0
15 CoreFoundation                 0x1846478cc __CFRunLoopRun
16 CoreFoundation                 0x18464716c CFRunLoopRunSpecific
17 GraphicsServices               0x18e47f328 GSEventRunModal
18 UIKitCore                      0x1886b1d0c UIApplicationMain
19 MyApp                           0x100d3ba64 main + 18 (main.swift:18)
20 libdyld.dylib                  0x1844d2424 start

仅发生在 iOS 13.0.0 (17A577)

对于导致此问题的步骤，我们没有太多背景信息，目前我们拥有的只是堆栈跟踪。

还有人遇到类似的事情吗？

对于可能导致此问题的原因有什么想法吗？

Answer 1

1. 对您创建的 UIWindow 具有强引用
2. 使用 makeKeyAndVisible 而不是设置 window.hidden = false