ios - 尝试插入新单元格时 UICollectionView 中的 NSInternalInconsistencyException

Question

我正在尝试将新单元格插入 _myMusicCollectionView。数据源是 SharedAppDelegate.myMusics 数组：

[_myMusicsCollectionView performBatchUpdates:^{
                                [SharedAppDelegate.myMusics addObject:c.item];
                                [_myMusicsCollectionView insertItemsAtIndexPaths:[[NSArray alloc] initWithObjects:[NSIndexPath indexPathForRow:SharedAppDelegate.myMusics.count-1 inSection:0], nil]];
                            } completion:^(BOOL finished) {
                                [_musicStoreCollectionView reloadItemsAtIndexPaths:[[NSArray alloc] initWithObjects:indPath, nil]];
                            }];

我正进入（状态：

Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'request for index path for global index 805306367 when there are only 1 items in the collection view'

我哪里错了？

Answer 1

正如您在错误原因中看到的那样，您正在访问索引 805306367 处的单元格。这可能意味着SharedAppDelegate.myMusics.count-1是负数或indPath包含错误值。