iOS 在用户选择或取消选择单元格时检查表格单元格按钮

Question

实际上，我正在使用用户输入创建条目集合。我想在其中使用复选框进行选择和取消选择。我使用了按钮而不是复选框，当用户在单元格上选择按钮图像时，按钮图像会发生变化，但是当用户再次在该单元格上选择时，什么也不会发生。这个我试过了。

   - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
    {
        if([[cell.btn backgroundImageForState:UIControlStateNormal]isEqual:[UIImage imageNamed:@"unchecked.png"]])
        {
            [cell.btn setBackgroundImage:[UIImage imageNamed:@"checked.png"] forState:UIControlStateNormal];
    }

并在 didDeselectRowAtIndexPath 中

-(void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if([[cell.btn backgroundImageForState:UIControlStateNormal]isEqual:[UIImage imageNamed:@"checked.png"]])
    {
         [cell.btn setBackgroundImage:[UIImage imageNamed:@"unchecked.png"] forState:UIControlStateNormal];

    }
}

请帮助我解决问题。

Answer 1

  You must be using data object whose data is used to show in table view just add one property in it isSelected . Lets name the array as "data".




 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
        {
            [data objectAtIndex:[indexPath row]].isSelected=YES;
            [tableView reloadData];//or just row
        }

    And in didDeselectRowAtIndexPath
    -(void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath
    {
        [data objectAtIndex:[indexPath row]].isSelected=NO;
        [tableView reloadData];//or just row
    }


    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

        //initial code

        //addd this code
        if([data objectAtIndex:[indexPath row]].isSelected){
          //set checked image 
        }else {
          //set unchecked image
        }
    }