线程1：iOS 13中的EXC_BAD_ACCESS（代码= 1，地址= 0x621a1f147f921）

Question

请在下面找到代码

class TaskAssigneeTableViewCell: GroupCell {

struct TaskShiftTime {

    var assigneeID: String?
    var userID: String?
    var taskStartTime: Date?
    var taskStopTime: Date?
    var userShiftStartTime: Date?
    var userShiftStopTime: Date?

    static func convertToShortDate(date: Date?) -> Date? {
        guard let date = date else { return nil }
        return DateUtil.convertDateToDate(date, format: APP.CONSTANTS.TIME_FORMAT.USER_SHIFT_TIME)
    }

}

fileprivate var taskShiftTime = TaskShiftTime()
fileprivate var shiftTimeIsBeingEnabled = false

required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
}

override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
    super.init(style: style, reuseIdentifier: reuseIdentifier)
}

@objc convenience init(style: UITableViewCellStyle, reuseIdentifier: String?, taskID: String, assigneeID: String, userID: String) {
    self.init(style: style, reuseIdentifier: reuseIdentifier)
    configure(taskID: taskID, assigneeID: assigneeID, userID: userID)
}

}

extension TaskAssigneeTableViewCell {


fileprivate func configure(taskID: String, assigneeID: String, userID: String) {
    taskShiftTime.assigneeID = assigneeID // the app crashes here giving exc_bad_access
    taskShiftTime.userID = userID
    setTaskTime(task: taskID)
    setUserShiftTime(user: userID)
}

创建单元格的代码如下-

        (UITableViewCell *)tableView:(UITableView *)tableView
             cellForRowAtIndexPath:(NSIndexPath *)indexPath
    {    static NSString *CellIdentifier = @"GroupCell";
        NSDictionary * dic;
        dic = [self.MembersArray objectAtIndex:indexPath.row];
        NSString *idUidString=@"";

        // EVO - SWIFT
        GroupCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];


   if (cell == nil) {
        cell = [[TaskAssigneeTableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:CellIdentifier taskID:self.TaskId assigneeID:self.assgineeUid userID:[dic valueForKey:@"uid"]];
    }
return cell;
}

该代码在iOS 12上运行良好，但在iOS 13上崩溃。我能理解为什么它给了我不好的访问异常，因为在访问其属性之前已经创建了taskShiftTime。 据我所知，错误的访问异常通常在我们尝试访问已释放的内容时发生，但在我的情况下却不会发生。 我不明白这一点。

来自fabric.io的崩溃日志如下-

Crashed: com.apple.main-thread
0  libswiftCore.dylib             0x1b6a0c7b4 _swift_release_(swift::HeapObject*) + 40
1  AirportTalk                    0x1051e2fdc specialized TaskAssigneeTableViewCell.configure(taskID:assigneeID:userID:) + 52 (TaskAssigneeView.swift:52)
2  AirportTalk                    0x1051e0804 @objc TaskAssigneeTableViewCell.init(style:reuseIdentifier:taskID:assigneeID:userID:) (<compiler-generated>)
3  AirportTalk                    0x104f23ff4 -[SelectAssignee tableView:cellForRowAtIndexPath:] + 142 (SelectAssignee.m:142)
4  UIKitCore                      0x1ad76bc88 -[UITableView _createPreparedCellForGlobalRow:withIndexPath:willDisplay:] + 640
5  UIKitCore                      0x1ad739348 -[UITableView _updateVisibleCellsNow:] + 2608
6  UIKitCore                      0x1ad756510 -[UITableView layoutSubviews] + 160
7  UIKitCore                      0x1ada1b604 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 2140
8  QuartzCore                     0x1aff6978c -[CALayer layoutSublayers] + 284
9  QuartzCore                     0x1aff6f908 CA::Layer::layout_if_needed(CA::Transaction*) + 480
10 UIKitCore                      0x1ada078b8 -[UIView(Hierarchy) layoutBelowIfNeeded] + 536
11 UIKitCore                      0x1ace9f7dc -[_UISheetPresentationController _sheetLayoutInfoLayout:] + 48
12 UIKitCore                      0x1ace9d110 -[_UISheetLayoutInfo _layout] + 312
13 UIKitCore                      0x1acea15a4 __54-[_UISheetPresentationController transitionWillBegin:]_block_invoke_2 + 52
14 UIKitCore                      0x1ada0e09c +[UIView(Animation) performWithoutAnimation:] + 96
15 UIKitCore                      0x1acea14d8 __54-[_UISheetPresentationController transitionWillBegin:]_block_invoke.337 + 128
16 UIKitCore                      0x1acf98a28 -[_UIViewControllerTransitionCoordinator _applyBlocks:releaseBlocks:] + 264
17 UIKitCore                      0x1acf953d8 -[_UIViewControllerTransitionContext __runAlongsideAnimations] + 256
18 UIKitCore                      0x1ada0de6c __63+[UIView(Animation) _setAlongsideAnimations:toRunByEndOfBlock:]_block_invoke + 28
19 UIKitCore                      0x1ad9e2a00 -[UIViewAnimationState _runAlongsideAnimations] + 32
20 UIKitCore                      0x1ad9e18ac -[UIViewAnimationState pop] + 52
21 UIKitCore                      0x1ad9deff0 +[UIViewAnimationState popAnimationState] + 64
22 UIKitCore                      0x1ada0f7b8 +[UIView(UIViewAnimationWithBlocks) _setupAnimationWithDuration:delay:view:options:factory:animations:start:animationStateGenerator:completion:] + 648
23 UIKitCore                      0x1ada0fd44 +[UIView(UIViewAnimationWithBlocks) animateWithDuration:delay:options:animations:completion:] + 108
24 UIKitCore                      0x1ad9da870 __50-[UITransitionView _startTransition:withDuration:]_block_invoke.169 + 76
25 UIKitCore                      0x1ada10308 +[UIView(UIViewAnimationWithBlocks) conditionallyAnimate:withAnimation:layout:completion:] + 88
26 UIKitCore                      0x1ad9da490 -[UITransitionView _startTransition:withDuration:] + 616
27 UIKitCore                      0x1ad9d9f2c -[UITransitionView transition:fromView:toView:removeFromView:] + 2368
28 UIKitCore                      0x1acf91a38 -[UIViewControllerBuiltinTransitionViewAnimator animateTransition:] + 1484
29 UIKitCore                      0x1acf99648 ___UIViewControllerTransitioningRunCustomTransition_block_invoke_2 + 56
30 UIKitCore                      0x1ad0a70ac +[UIInputResponderController _pinInputViewsForInputResponderController:onBehalfOfResponder:duringBlock:] + 104
31 UIKitCore                      0x1acf995d8 ___UIViewControllerTransitioningRunCustomTransition_block_invoke.645 + 176
32 UIKitCore                      0x1ada0dd54 +[UIView(Animation) _setAlongsideAnimations:toRunByEndOfBlock:] + 172
33 UIKitCore                      0x1acf99440 _UIViewControllerTransitioningRunCustomTransition + 580
34 UIKitCore                      0x1ace90a24 __56-[UIPresentationController runTransitionForCurrentState]_block_invoke.465 + 2348
35 UIKitCore                      0x1ad58fe7c _runAfterCACommitDeferredBlocks + 316
36 UIKitCore                      0x1ad57f82c _cleanUpAfterCAFlushAndRunDeferredBlocks + 232
37 UIKitCore                      0x1ad5af8dc _afterCACommitHandler + 76
38 CoreFoundation                 0x1a949ac2c __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 32
39 CoreFoundation                 0x1a9495b18 __CFRunLoopDoObservers + 416
40 CoreFoundation                 0x1a94960e4 __CFRunLoopRun + 1308
41 CoreFoundation                 0x1a94958a0 CFRunLoopRunSpecific + 464
42 GraphicsServices               0x1b33ed328 GSEventRunModal + 104
43 UIKitCore                      0x1ad586740 UIApplicationMain + 1936
44 AirportTalk                    0x105074aec main + 14 (main.m:14)
45 libdyld.dylib                  0x1a9320360 start + 4