iOS indexPath is nil (custom accessory image)

Question

I've used the sample code from Apple for "Accessory" to have a custom accessory image in my table. The table renders the image properly and everything but when I click on the image that is supposed to take me to the accessoryButtonTappedForRowWithIndexPath method nothing happens because indexPath is nil for some reason. See this method which checks the indexPath:

- (void)accessoryButtonTapped:(id)sender event:(id)event
{
    NSSet *touches = [event allTouches];
    UITouch *touch = [touches anyObject];
    CGPoint currentTouchPosition = [touch locationInView:self.tableView];
    NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint: currentTouchPosition];
    if (indexPath != nil)
    {
        [self tableView: self.tableView accessoryButtonTappedForRowWithIndexPath: indexPath];
    }
}

Answer 1

Why can't you just use tableView:accessoryButtonTappedForRowWithIndexPath: in your UITableViewDelegate?