Apple Silicon M1 上的 iOS 应用程序崩溃 *** -[_UIRegularOverlayScrollerImp setKnobProportion:]、_UIScrollerImp.m:347 中的断言失败

Question

当我访问我的 iOS 应用 的一个视图控制器时，我收到了一个不熟悉的崩溃日志，该应用是在 [=18= 上作为本机应用 构建的]Apple Silicon M1 Mac.
它在模拟器和 iOS 设备上运行良好。

有人知道这是怎么回事吗？

2020-12-16 23:02:39.680945+0100 MyApp[45300:9651291] [AXRuntimeCommon] Unknown client: MyApp
2020-12-16 23:02:40.336674+0100 MyApp[45300:9651291] *** Assertion failure in -[_UIRegularOverlayScrollerImp setKnobProportion:], _UIScrollerImp.m:347
2020-12-16 23:03:10.902600+0100 MyApp[45300:9651291] [General] Invalid parameter not satisfying: !isnan(newKnobProportion)
2020-12-16 23:03:10.907684+0100 MyApp[45300:9651291] [General] (
  0   CoreFoundation                      0x00000001912a1320 __exceptionPreprocess + 240
  1   libobjc.A.dylib                     0x0000000190fcfc04 objc_exception_throw + 60
  2   CoreFoundation                      0x00000001912cc294 -[NSException description] + 0
  3   Foundation                          0x0000000192084bb4 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 132
  4   UIKitCore                           0x00000001b39d4224 -[_UIScrollerImp setKnobProportion:] + 256
  5   UIKitCore                           0x00000001b39d39c4 __54-[UIScrollView _updateScrollerImpsForcingReplacement:]_block_invoke + 272
  6   UIKitCore                           0x00000001b39d0eec -[UIScrollView _updateScrollerImpsForcingReplacement:] + 2844
  7   UIKitCore                           0x00000001b3a32370 -[UIScrollView _willMoveToWindow:] + 200
  8   UIKitCore                           0x00000001b3953268 _makeSubTreePerformSelector + 456
  9   UIKitCore                           0x00000001b3952384 -[UIView(Internal) _addSubview:positioned:relativeTo:] + 452
  10  UIKitCore                           0x00000001b39f2eac -[UINavigationTransitionView transition:fromView:toView:] + 608
  11  UIKitCore                           0x00000001b39f0614 -[UINavigationController _startTransition:fromViewController:toViewController:] + 2736
  12  UIKitCore                           0x00000001b39ef430 -[UINavigationController _startDeferredTransitionIfNeeded:] + 880
  13  UIKitCore                           0x00000001b3a17300 -[UINavigationController __viewWillLayoutSubviews] + 168
  14  UIKitCore                           0x00000001b39fbee0 -[UILayoutContainerView layoutSubviews] + 228
  15  UIKit                               0x00000001e0605acc -[UILayoutContainerViewAccessibility layoutSubviews] + 52
  16  UIKitCore                           0x00000001b39a4130 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 2552
  17  QuartzCore                          0x00000001974b41a0 -[CALayer layoutSublayers] + 372
  18  QuartzCore                          0x00000001974b3ad0 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 524
  19  QuartzCore                          0x00000001975d7db0 _ZN2CA7Context18commit_transactionEPNS_11TransactionEdPd + 420
  20  QuartzCore                          0x0000000197492c6c _ZN2CA11Transaction6commitEv + 732
  21  UIKitCore                           0x00000001b3905724 _afterCACommitHandler + 144
  22  CoreFoundation                      0x0000000191222df8 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 36
  23  CoreFoundation                      0x0000000191222c44 __CFRunLoopDoObservers + 576
  24  CoreFoundation                      0x0000000191221784 CFRunLoopRunSpecific + 684
  25  HIToolbox                           0x0000000198d2af0c RunCurrentEventLoopInMode + 292
  26  HIToolbox                           0x0000000198d2abcc ReceiveNextEventCommon + 320
  27  HIToolbox                           0x0000000198d2aa6c _BlockUntilNextEventMatchingListInModeWithFilter + 76
  28  AppKit                              0x00000001939f6db0 _DPSNextEvent + 868
  29  AppKit                              0x00000001939f5730 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1312
  30  AppKit                              0x00000001939e758c -[NSApplication run] + 600
  31  AppKit                              0x00000001939b8d74 NSApplicationMain + 1064
  32  AppKit                              0x0000000193caa6a8 +[NSWindow _savedFrameFromString:] + 0
  33  UIKitMacHelper                      0x00000001a3dce388 UINSApplicationMain + 1276
  34  UIKitCore                           0x00000001b38f2a8c UIApplicationMain + 164
  35  MyApp                            0x000000010009c468 main + 128
  36  libdyld.dylib                       0x0000000191144f54 start + 4
)
(lldb)

Answer 1

所以我终于解决了这个问题：

崩溃是由于在具有无效框架（包含 Inf）的 UIView 上调用 sizeToFit 引起的。
有趣的是，这只发生在为 Apple Silicon 构建时 - “我的 Mac（专为 iPad 设计）”- 目标。

我是这样快速解决的：

    if (!CGRectIsEmpty(_infoLabel.frame)) { // this sufficed for me to weed out 'bad' rects
        [_infoLabel sizeToFit];
    }

Apple Silicon M1 上的 iOS 应用程序崩溃 *** -[_UIRegularOverlayScrollerImp setKnobProportion:]、_UIScrollerImp.m:347 中的断言失败

Crash in iOS App on Apple Silicon M1 *** Assertion failure in -[_UIRegularOverlayScrollerImp setKnobProportion:], _UIScrollerImp.m:347

xcode

objective-c

uiviewcontroller

ios

apple-m1