Question

i have a table view in which i can add 1 or subtract 1 to the value of my cell.textLabel.text but when i switch views and return or scroll a cell out of the view, and when it comes back into view, the textLabel‘s value returns to 1 which is the original starting point! Please help! Here is the code to add and subtract 1:

 - (IBAction)addLabelText:(id)sender{

    cell = (UITableViewCell*)[sender superview]; // <-- ADD THIS LINE

        cell.textLabel.text = [NSString stringWithFormat:@"%d",[cell.textLabel.text  
                                                                intValue] +1];

}


- (IBAction)subtractLabelText:(id)sender
{
   cell = (UITableViewCell *)[sender superview];        
    if ( [[cell.textLabel text] intValue] == 0){ 
        cell.textLabel.text = [NSString stringWithFormat:@"%d",[cell.textLabel.text intValue] +0];
    }
    else{
        cell.textLabel.text = [NSString stringWithFormat:@"%d",[cell.textLabel.text intValue] -1];
    }
}

Answer 1

Seems like you are allocating a new cell each time.. and not using the cell re-usablility method.
In your case, when you are performing arithmetic actions to your previous values and you don’t have an array to store previous values. The easiest way to fix this is make your Cell-Identifier unique. (something like @”Cell-%d”,indexPAth.row)

Note: However, more efficient way would be to save your result in the array you are populating your data from, without making you Cell-Identifier unique.