该应用程序仅在iOS 13版本上崩溃，崩溃详细信息来自Firebase Crashlytics。
没有关于应用崩溃的应用位置的具体详细信息。我试图找出它，但没有成功。
致命异常：NSInvalidArgumentException -[WAKScrollView canBecomFocused]：发送到实例0x283fc5e80的无法识别的选择器
Fatal Exception: NSInvalidArgumentException
0 CoreFoundation 0x1a534b5f0 __exceptionPreprocess
1 libobjc.A.dylib 0x1a506dbcc objc_exception_throw
2 CoreFoundation 0x1a524fea8 -[NSOrderedSet initWithSet:copyItems:]
3 CoreFoundation 0x1a534f694 ___forwarding___
4 CoreFoundation 0x1a53515bc _CF_forwarding_prep_0
5 UIKitCore 0x1a8ef0664 _UIFocusItemCanBecomeFocusedAndChildrenAreNotFocused
6 UIKitCore 0x1a8f12a58 -[_UIFocusItemRegion initWithFrame:item:]
7 WebCore 0x1dac31288 -[UIKitWebAccessibilityObjectWrapper(UIFocusConformance) _searchForFocusRegionsInContext:]
8 UIKitCore 0x1a8f28ff4 -[_UIFocusMapSnapshot addRegionsInContainer:]
9 WebCore 0x1dac311d4 -[UIKitWebAccessibilityObjectWrapper(UIFocusConformance) _searchForFocusRegionsInContext:]
10 UIKitCore 0x1a8f28ff4 -[_UIFocusMapSnapshot addRegionsInContainer:]
11 UIKitCore 0x1a9886828 -[UIView _addAccessibilityFocusContainersInRect:inCoordinateSpace:context:]
12 UIKitCore 0x1a9886504 -[UIView _searchForFocusRegionsInContext:]
13 UIKitCore 0x1a8f28ff4 -[_UIFocusMapSnapshot addRegionsInContainer:]
14 UIKitCore 0x1a8f291c4 -[_UIFocusMapSnapshot addRegionsInContainers:]
15 UIKitCore 0x1a98864e0 -[UIView _searchForFocusRegionsInContext:]
16 UIKitCore 0x1a8f28ff4 -[_UIFocusMapSnapshot addRegionsInContainer:]
17 UIKitCore 0x1a8f291c4 -[_UIFocusMapSnapshot addRegionsInContainers:]
18 UIKitCore 0x1a98864e0 -[UIView _searchForFocusRegionsInContext:]
19 UIKitCore 0x1a8f28ff4 -[_UIFocusMapSnapshot addRegionsInContainer:]
20 UIKitCore 0x1a8f291c4 -[_UIFocusMapSnapshot addRegionsInContainers:]
21 UIKitCore 0x1a98864e0 -[UIView _searchForFocusRegionsInContext:]
22 UIKitCore 0x1a8f28ff4 -[_UIFocusMapSnapshot addRegionsInContainer:]
23 UIKitCore 0x1a8f291c4 -[_UIFocusMapSnapshot addRegionsInContainers:]
24 UIKitCore 0x1a98864e0 -[UIView _searchForFocusRegionsInContext:]
25 UIKitCore 0x1a8f28ff4 -[_UIFocusMapSnapshot addRegionsInContainer:]
26 UIKitCore 0x1a8f291c4 -[_UIFocusMapSnapshot addRegionsInContainers:]
27 UIKitCore 0x1a98864e0 -[UIView _searchForFocusRegionsInContext:]
28 UIKitCore 0x1a8f28ff4 -[_UIFocusMapSnapshot addRegionsInContainer:]
29 UIKitCore 0x1a8f291c4 -[_UIFocusMapSnapshot addRegionsInContainers:]
30 UIKitCore 0x1a98864e0 -[UIView _searchForFocusRegionsInContext:]
31 UIKitCore 0x1a8f28ff4 -[_UIFocusMapSnapshot addRegionsInContainer:]
32 UIKitCore 0x1a8f2888c -[_UIFocusMapSnapshot _capture]
33 UIKitCore 0x1a8f27e38 -[_UIFocusMapSnapshot _initWithSnapshotter:mapArea:searchArea:]
34 UIKitCore 0x1a8f29f2c -[_UIFocusMapSnapshotter captureSnapshot]
35 UIKitCore 0x1a8f21754 -[_UIFocusMap _defaultFocusItemInEnvironment:limitScopeUsingFocusPreferences:]
36 UIKitCore 0x1a8efbd84 -[_UIFocusEnvironmentPreferenceEnumerationContext _inferPreferencesForEnvironment:]
37 UIKitCore 0x1a8efbb40 -[_UIFocusEnvironmentPreferenceEnumerationContext _resolvePreferredFocusEnvironments]
38 UIKitCore 0x1a8efba80 -[_UIFocusEnvironmentPreferenceEnumerationContext prefersNothingFocused]
39 UIKitCore 0x1a8efc550 _enumeratePreferredFocusEnvironments
40 UIKitCore 0x1a8efc670 _enumeratePreferredFocusEnvironments
41 UIKitCore 0x1a8efc670 _enumeratePreferredFocusEnvironments
42 UIKitCore 0x1a8efc670 _enumeratePreferredFocusEnvironments
43 UIKitCore 0x1a8efc670 _enumeratePreferredFocusEnvironments
44 UIKitCore 0x1a8efc670 _enumeratePreferredFocusEnvironments
45 UIKitCore 0x1a8efc670 _enumeratePreferredFocusEnvironments
46 UIKitCore 0x1a8efc344 -[_UIFocusEnvironmentPreferenceEnumerator enumeratePreferencesForEnvironment:usingBlock:]
47 UIKitCore 0x1a8efccc4 -[_UIDeepestPreferredEnvironmentSearch deepestPreferredFocusableItemForEnvironment:inFocusSystem:]
48 UIKitCore 0x1a8f3af68 -[UIFocusUpdateContext _updateDestinationItemIfNeeded]
49 UIKitCore 0x1a8f3ad48 -[UIFocusUpdateContext _destinationItemInfo]
50 UIKitCore 0x1a8f3ac30 -[UIFocusUpdateContext nextFocusedItem]
51 UIKitCore 0x1a8f2b96c -[UIFocusSystem updateFocusIfNeeded]
52 UIKitCore 0x1a93ff94c _runAfterCACommitDeferredBlocks
53 UIKitCore 0x1a93ef2f4 _cleanUpAfterCAFlushAndRunDeferredBlocks
54 UIKitCore 0x1a941f744 _afterCACommitHandler
55 CoreFoundation 0x1a52c8fb8 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__
56 CoreFoundation 0x1a52c3eac __CFRunLoopDoObservers
57 CoreFoundation 0x1a52c4328 __CFRunLoopRun
58 CoreFoundation 0x1a52c3c34 CFRunLoopRunSpecific
59 GraphicsServices 0x1af40d38c GSEventRunModal
60 UIKitCore 0x1a93f622c UIApplicationMain
61 MagicBox Learning 0x104718058 main + 14 (main.m:14)
62 libdyld.dylib 0x1a514b800 start
如果设备连接了蓝牙键盘，我们的应用程序中就遇到了此问题，但前提是启用了设置->辅助功能->键盘->全键盘访问设置。 一旦关闭，就不会有更多的崩溃。