Question

我知道50次之前已经问过这个问题，但是我已经查看了所有其他答案，但没有找到任何可以解决我问题的方法。

无论如何这是我的代码：

NSMutableArray *cellIndicesToBeDeleted = [[NSMutableArray alloc] init];
        for (int i = 0; i < [thetableView numberOfRowsInSection:0]; i++) {
            NSIndexPath *p = [NSIndexPath indexPathForRow:i inSection:0];
            if ([[thetableView cellForRowAtIndexPath:p] accessoryType] == UITableViewCellAccessoryCheckmark) {
                [cellIndicesToBeDeleted addObject:p];
                [self.cellArray removeObjectAtIndex:i];
            }
        }
        [thetableView deleteRowsAtIndexPaths:cellIndicesToBeDeleted withRowAnimation:UITableViewRowAnimationLeft];
        [cellIndicesToBeDeleted release];

当我执行此代码时，我得到了这个崩溃日志：

Invalid update: invalid number of rows in section 0.  The number of rows contained in an existing section after the update (2) must be equal to the number of rows contained in that section before the update (2), 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).'

有人看到我做错了吗？

新代码：

NSMutableIndexSet *mutableIndexSet = [[NSMutableIndexSet alloc] init];
        NSMutableArray *cellIndicesToBeDeleted = [[NSMutableArray alloc] init];
        for (int i = 0; i < [thetableView numberOfRowsInSection:0]; i++) {
            NSIndexPath *p = [NSIndexPath indexPathForRow:i inSection:0];
            if ([[thetableView cellForRowAtIndexPath:p] accessoryType] == UITableViewCellAccessoryCheckmark) {
                [cellIndicesToBeDeleted addObject:p];
                [mutableIndexSet addIndex:p.row];
            }
        }
        [self.cellArray removeObjectsAtIndexes:mutableIndexSet];
        [thetableView deleteRowsAtIndexPaths:cellIndicesToBeDeleted withRowAnimation:UITableViewRowAnimationLeft];
        [cellIndicesToBeDeleted release];
        [mutableIndexSet release];

Answer 1

我认为它与numberOfRowsInSection有关。我没有使用更新的数据源更新我的nsuserdefaults，所以我现在就这样做了，它完美无缺。这是我更新的代码：

//Code to delete rows
        NSMutableIndexSet *mutableIndexSet = [[NSMutableIndexSet alloc] init];
        NSMutableArray *cellIndicesToBeDeleted = [[NSMutableArray alloc] init];
        for (int i = [thetableView numberOfRowsInSection:0] - 1; i >= 0; i--) {
            NSIndexPath *p = [NSIndexPath indexPathForRow:i inSection:0];
            if ([[thetableView cellForRowAtIndexPath:p] accessoryType] == UITableViewCellAccessoryCheckmark) {
                [cellIndicesToBeDeleted addObject:p];
                [mutableIndexSet addIndex:p.row];
            }
        }
        [self.cellArray removeObjectsAtIndexes:mutableIndexSet];
        [[NSUserDefaults standardUserDefaults] setObject:self.cellArray forKey:@"cellArray"];
        [thetableView deleteRowsAtIndexPaths:cellIndicesToBeDeleted withRowAnimation:UITableViewRowAnimationLeft];
        [cellIndicesToBeDeleted release];
        [mutableIndexSet release];

Answer 2

您需要在删除行之前和之后添加以下内容：

[theTableView beginUpdates];
// your code goes here
[theTableView endUpdates];

无效更新：第0部分UITableView中的行数无效

2 个答案: