如何使用reloadRowsAtIndexPath更新行 [英] How update rows with reloadRowsAtIndexPath

问题描述

我正在尝试用Button删除单元格。

I'm trying to delete cell with a Button.

这是单元格的实现。

- (UITableViewCell *)tableView:(UITableView *)tableView 
         cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *cellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier] autorelease];

        UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        btn.frame = CGRectMake(0.f, 0.f, 30.f, 30.f);
        [btn addTarget:self 
                action:@selector(btnTouched:)
      forControlEvents:UIControlEventTouchUpInside];
      [cell addSubview:btn];
      cell.tag = indexPath.row;
    }
   return cell;
}

- (void)btnTouched:(UIButton *)sender
{
    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:sender.tag inSection:0];

    [_myMutableArray removeObjectAtIndex:sender.tag];
    [_tableView beginUpdates];
    [_tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]
                      withRowAnimation:UITableViewRowAnimationLeft];
    [_tableView endUpdates];
}

这种方式很有效，直到我删除一行，按钮不是删除后重新加载，我不删除好的索引。我试图在 endUpdates reloadRowsAtIndexPaths：withRowAnimation： for visible indexPath $ c>方法，效果很好。但是reloadRows动画使删除动画变得丑陋（即使我将其设置为NO）。
所以有没有办法在没有reloadCellsAtIndexPath的情况下重新加载单元格。或者在不使用标签的情况下删除行。

This works well until I've delete a row, the button isn't reloaded so after a delete, I don't delete the good index. I tried to put reloadRowsAtIndexPaths:withRowAnimation: for visible indexPath after the endUpdates method and it works very well. But the delete animation became ugly by the reloadRows animation (even if I set it to NO). So is there a way to reload cells without reloadCellsAtIndexPath. Or delete a rows without using tags.

很多。

Thx a lot.

推荐答案

您应该能够使用类似于以下内容的逻辑查找单元格的索引：

You should be able to lookup the index of the cell by using logic similar to the following:

NSIndexPath *indexPath = [_tableView indexPathForCell:(UITableViewCell *)[sender superview]];

使用这种方法，您不需要在行标记中存储行索引的值。

With this approach, you would not need to store the value of the row index in the cell tag.

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