iphone开发:更改tableviewcell上的按钮图像

Question

在我的应用程序中,我面临一个非常奇怪的问题.我试图解决它几个小时但到目前为止找不到问题.

好吧,我有自定义单元格的tableview.每个单元格我都有一个按钮.它就像一个空盒子.按下按钮时,我想更改该按钮的相关单元格图像.实际上我成功地做到了,但不知何故,其他一些细胞的按钮图像也在变化,我无法弄清楚为什么.这是我的代码:

    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
    {
        static NSString *CellIdentifier = @"cell";
        CustomCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
        if (cell == nil)
        {
            //create new cell
            cell = [[CustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
        }
        [cell.tickButton setTag:indexPath.row];
        [cell.tickButton addTarget:self action:@selector(buttonWasPressed:)forControlEvents:UIControlEventTouchUpInside];

//cell has 2 label so I filled them with the contents of my object array that part is working with no problem
        cell.leftLabel.text = [NSString stringWithFormat:@"%@", [[contacts objectAtIndex:indexPath.row]name]];
        cell.rightLabel.text = [NSString stringWithFormat:@"%@", [[contacts objectAtIndex:indexPath.row]email]];

        return cell;
    }

在我的buttonWasPressed方法中,我只是这样做:

-(IBAction)buttonWasPressed:(id)sender
{
    UIButton *button = (UIButton *)sender;
  [button setImage:[UIImage imageNamed:@"ticck.jpeg"] forState:UIControlStateNormal];

}

正如我之前说的那样有效,但也改变了一些其他按钮图像,当我向下滚动并回到初始位置时,我看到一些按钮图像被更改.

Answer 1

您可以访问该单元格,并可以将按钮图像更改为:

-(IBAction)buttonWasPressed:(id)sender
{

    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:your_row inSection:your_section];
    UITableViewCell *currentCell = [table cellForRowAtIndexPath:indexPath];
    UIButton *button = (UIButton *)[currentCell viewWithTag:(UIButton *)sender.tag];
    [button setImage:[UIImage imageNamed:@"ticck.jpeg"] forState:UIControlStateNormal];
}

希望它能帮到你.