objective-c - 滚动时复制UITableViewCell contentView的 subview (UIButton和UIImageView)

在TableView中，在某些单元格中，我添加了ImageView作为单元格ContentView的子视图。在滚动表格视图上下这些图像复制在其他单元格。但这个问题并不总是发生。请提出一个解决方案。我正在使用以下代码。

static NSString *CellIdentifier = @"Cell";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

if (cell == nil)
{
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    [cell setSelectionStyle:UITableViewCellSelectionStyleNone];

    if (friendsArray.count != 0)
    {
        NSString *str = [friendsIdArray objectAtIndex:indexPath.row];
        if ([pendingRequests containsObject:str])
        {
            // Add image for pending item
            UIImageView *pendImage = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"pendng.png"]];
            pendImage.frame = CGRectMake(220.0, 2.5, 70, 40);
            pendImage.tag = indexPath.row;
            [cell.contentView addSubview:pendImage];
        }
    }

}

NSString *object;

if (friendsArray.count == 0)
{
    if ([cell.contentView viewWithTag:indexPath.row])
    {
        for (UIView *subview in [cell.contentView subviews])
        {
            [subview removeFromSuperview];
        }
    }

    object = @"No friends added to the list";
    cell.textLabel.textAlignment = UITextAlignmentCenter;
}
else
{
    object = [friendsArray objectAtIndex:indexPath.row];
    cell.textLabel.textAlignment = UITextAlignmentLeft;

    if (![cell.contentView viewWithTag:indexPath.row])
    {
        NSString *str = [friendsIdArray objectAtIndex:indexPath.row];
        if ([pendingRequests containsObject:str])
        {
            // Add image for pending item
            UIImageView *pendImage = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"pendng.png"]];
            pendImage.frame = CGRectMake(220.0, 2.5, 70, 40);
            pendImage.tag = indexPath.row;
            [cell.contentView addSubview:pendImage];
        }
    }
}

最佳答案

问题现在解决了。我在创建新tableviewcell的else案例中使用了下面的一行。

[cell.contentView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];

我已经编辑了代码，如下所示：

if (cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
        [cell setSelectionStyle:UITableViewCellSelectionStyleNone];
    }
    else
    {
        [cell.contentView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];
    }