UITableView didSelectRowAtIndexPath add additional checkmark at tap

Question

When i select a player in \'didSelectRowAtIndexPath\' and add a checkmark on the selected row it adds an additional checkmark.

If i tap row = 0 it adds a checkmark to ro

Answer 1

For others coming here (like I did) to see why their table selects random cells, you have to add something like the following to your cellForRowAtIndexPath:

// Assume cell not checked;
[cell setAccessoryType:UITableViewCellAccessoryNone];
for (int i = 0; i < checkedIndexPaths.count; i++) {
    NSUInteger num = [[checkedIndexPaths objectAtIndex:i] row];

    if (num == indexPath.row) {
        [cell setAccessoryType:UITableViewCellAccessoryCheckmark];
    }
}

I keep a NSMutableArray called checkedIndexPaths so that I know which indexPaths are checked. Keeping such an array allows you to easily limit the number of cells a user can check. Here's an example of my didSelectRowAtIndexPath:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];

    // uncheck if already checked
    if (cell.accessoryType == UITableViewCellAccessoryCheckmark) {
        cell.accessoryType = UITableViewCellAccessoryNone;
        [checkedIndexPaths removeObject:indexPath];
    }
    else {
        // make sure no more than 3 are selected
        if ([checkedIndexPaths count] < 3) {

            // check row
            cell.accessoryType = UITableViewCellAccessoryCheckmark;
            // add it to our list of checked indexes
            [checkedIndexPaths addObject:indexPath];
        } else {
            UIAlertView* alert = [[UIAlertView alloc] initWithTitle:@"Note" 
                                                            message:@"You can only select 3 rows." 
                                                           delegate:nil 
                                                  cancelButtonTitle:@"OK" otherButtonTitles:nil];
            [alert show];
        }
    }  
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
}