Question

You can add and subtract 1 from my cell.textLabel.text. I am adding 1 with this method:

  - (IBAction)addLabelText:(id)sender{

     num = [NSString stringWithFormat:@"%d",[cell.textLabel.text intValue] +1];
     number = [[NSMutableArray alloc]initWithObjects:num, nil];
     [myTableView reloadData];

}

And i cant get the textLabel to subtract! here is my method:

    - (IBAction)subtractLabelText:(id)sender
{
     if ( [[cell.textLabel text] intValue] == 0){  

     num = [NSString stringWithFormat:@"%d",[num intValue] +0];
     [number addObject:num];

     }
     else{

     num = [NSString stringWithFormat:@"%d",[num intValue] -1];
     [number addObject:num];

     }
}

In my cellForRowAtIndexPath method, i am trying to set the label’s text with this line:

    cell.textLabel.text = [number objectAtIndex:indexPath.row];

The + button works, but the – button doesnt. How could i fix this? Thanks in advance!

CELLFORROW

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

    cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil)
     {
         cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
         addBtn = [[UIButton alloc]init];
         addBtn =[UIButton buttonWithType:UIButtonTypeRoundedRect];
         [addBtn setFrame:CGRectMake(220,10,25,55)];
         [addBtn addTarget:self action:@selector(addLabelText:) forControlEvents:UIControlEventTouchUpInside];
         [addBtn setTitle:@"+" forState:UIControlStateNormal];
         [addBtn setEnabled:YES];
         [cell addSubview:addBtn];

         subBtn = [[UIButton alloc]init];
         subBtn=[UIButton buttonWithType:UIButtonTypeRoundedRect];
         [subBtn setFrame:CGRectMake(260,10,25,55)];
         [subBtn addTarget:self action:@selector(subtractLabelText:) forControlEvents:UIControlEventTouchUpInside];
         [subBtn setTitle:@"-" forState:UIControlStateNormal];
         [subBtn setEnabled:YES];
         [cell addSubview:subBtn];
         //cell.textLabel.text = @"1";
     } 
    //cellText.hidden=!self.editing;

    [cell setSelectionStyle:UITableViewCellSelectionStyleNone];
    cell.imageView.image = [imageArray objectAtIndex:indexPath.row];  
    cell.textLabel.text = [number objectAtIndex:indexPath.row];


return cell;
}

Answer 1

It will crash because the cell is not the same cell on which your + and – buttons are there.
You have to get the “UITableViewCell” in which you clicked the “+” or “-” button. And then manipulate the text as you required.