UITableView删除的RowsAtIndexPath崩溃

Question

我有UITableView，我实现了-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath:

-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
NSUInteger beforeDeleteCount = historyArray.count;
VideoItem *video = [historyArray objectAtIndex:indexPath.row];
[[HistoryRepository sharedHistory] removeFromHistories:video];
if (self.titleSort) {
[self sortArrayByTitleAtoZWithReloadData:NO];
} else {
[self sortArrayByNormalWithReloadData:NO];
}
NSUInteger afterDeleteCount = historyArray.count;
if (beforeDeleteCount == afterDeleteCount) {
[table reloadData];
} else {
[tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
}
}
-(void)sortArrayByNormalWithReloadData:(BOOL)reload {
self.titleSort = NO;
historyArray = [[NSMutableArray alloc] initWithArray:[[HistoryRepository sharedHistory] historyArray]];
if (reload) {
[self setTableHeader];
[table reloadData];
}
}
-(void)sortArrayByTitleAtoZWithReloadData:(BOOL)reload {
self.titleSort = YES;
NSSortDescriptor * sortDescriptor = [[[NSSortDescriptor alloc]initWithKey:@"name" ascending:YES selector:@selector(caseInsensitiveCompare:)] autorelease];
historyArray = [[NSMutableArray alloc] initWithArray:[[[HistoryRepository sharedHistory] historyArray] sortedArrayUsingDescriptors:@[sortDescriptor]]];
if (reload) {
[self setTableHeader];
[table reloadData];
}
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return [historyArray count];
}

我仍然总是遇到这种错误：

Invalid update: invalid number of rows in section 0. The number of rows contained in an existing section after the update (27) must be equal to the number of rows contained in that section before the update (27), plus or minus the number of rows inserted or deleted from that section (0 inserted, 1 deleted) and plus or minus the number of rows moved into or out of that section (0 moved in, 0 moved out).

我总是检查它是否是相同的计数，所以重新加载表，不要删除，但我仍然会收到这个错误。

Answer 1

如果数组已经排序，则在删除项后重新排序数据源数组是没有意义的。

无论如何，在对数据源数组进行重新排序后，都不能调用deleteRowsAtIndexPaths。

这个版本的commitEditingStyle:是足够的

-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
VideoItem *video = [historyArray objectAtIndex:indexPath.row];
[[HistoryRepository sharedHistory] removeFromHistories:video];
[historyArray removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
}