我无法弄清楚这次崩溃的原因是什么？
Incident Identifier: BF4459C1-B97D-448E-AAE0-4DA6A1E4731C
CrashReporter Key: E725A626-A25C-4923-8383-0BC7ECA7DADE
Hardware Model: iPhone6,1
Process: SampleProject [480]
Path: /var/containers/Bundle/Application/458F9694-4BDA-4207-8C90-C2192520F8E2/SampleProject.app/SampleProject
Identifier: com.mydomain.SampleProject
Version: 1.3.0 (1.3.0.36)
Code Type: ARM-64
Parent Process: ??? [1]
Date/Time: 2017-05-17T04:11:03Z
Launch Time: 2017-05-17T04:06:51Z
OS Version: iPhone OS 10.3.1 (14E304)
Report Version: 104
Exception Type: SIGSEGV
Exception Codes: SEGV_ACCERR at 0xfffffffffffffff8
Crashed Thread: 0
Application Specific Information:
Selector name found in current argument registers: _setLayoutAttributes:atGlobalItemIndex:
Thread 0 Crashed:
0 UIKit 0x000000018de7d38c -[UICollectionViewData _setLayoutAttributes:atGlobalItemIndex:] + 80
1 UIKit 0x000000018de7ac94 __45-[UICollectionViewData validateLayoutInRect:]_block_invoke + 1892
2 UIKit 0x000000018de79f68 -[UICollectionViewData validateLayoutInRect:] + 1492
3 UIKit 0x000000018de8023c -[UICollectionViewData layoutAttributesForElementsInRect:] + 264
4 UIKit 0x000000018de7dbc0 -[UICollectionView _updateVisibleCellsNow:] + 548
5 UIKit 0x000000018dfea058 -[UICollectionView _setupCellAnimations] + 28
6 UIKit 0x000000018dff459c -[UICollectionView _beginUpdates] + 44
7 UIKit 0x000000018e72c8c0 -[UICollectionView _performBatchUpdates:completion:invalidationContext:tentativelyForReordering:animator:] + 256
8 UIKit 0x000000018e72c79c -[UICollectionView _performBatchUpdates:completion:invalidationContext:tentativelyForReordering:] + 92
9 UIKit 0x000000018e72c720 -[UICollectionView _performBatchUpdates:completion:invalidationContext:] + 80
10 UIKit 0x000000018dff4558 -[UICollectionView performBatchUpdates:completion:] + 60
11 SampleProject 0x000000010002a4b8 -[InvitesDataSource didDeleteDataAtIndexes:loadDataAtIndexes:] (InvitesDataSource.m:50)
12 SampleProject 0x0000000100092f58 -[DialogsController _didReceiveOldestInvites:] (DialogsController.m:311)
13 SampleProject 0x0000000100092500 -[DialogsController _didReceiveOldestDialogs:ofType:] (DialogsController.m:248)
14 SampleProject 0x000000010004aad8 -[DialogsController(Notifications) dialogListDidReceived:] (DialogsController+Notifications.m:94)
崩溃日志中提到的一段代码非常平静:
- (void)didDeleteDataAtIndexes:(NSIndexSet *)deleted loadDataAtIndexes:(NSIndexSet *)loaded {
[self.collectionView performBatchUpdates:^{
[deleted enumerateIndexesUsingBlock:^(NSUInteger idx, BOOL *stop) {
[self.collectionView deleteItemsAtIndexPaths:[self _indexPathsForIndex:idx]];
}];
[loaded enumerateIndexesUsingBlock:^(NSUInteger idx, BOOL *stop) {
[self.collectionView insertItemsAtIndexPaths:[self _indexPathsForIndex:idx]];
}];
} completion:^(BOOL finished) {
[self.collectionView reloadData];
}];
}
最佳答案
这可能会发生，因为您确实还需要确保使用 collectionViews 来删除和插入部分。当您尝试在不存在的部分中插入项目时，您将遇到此崩溃。
当您在 X+1、X 处插入项目时，预制批量更新不知道您打算添加 X+1 部分，而您尚未添加该部分。
确保使用插入和删除部分: https://developer.apple.com/documentation/uikit/uicollectionview/1618090-insertsections https://developer.apple.com/documentation/uikit/uicollectionview/1618102-deletesections
关于ios - UICollectionView 在 PerformBatchUpdates 上崩溃，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/44311117/