title: Problems with a checkmark in a UITableViewCell
body: <p>I have implemented this below code.</p>
  
  <pre><code>UITableViewCell *cell = [tableView1 cellForRowAtIndexPath:indexPath];
  UITableViewCell *cell2 = [tableView1 cellForRowAtIndexPath:oldIndexPath1];
  
  cell.accessoryType = UITableViewCellAccessoryCheckmark;
  cell2.accessoryType = UITableViewCellAccessoryNone;
  oldIndexPath1 = indexPath;
  </code></pre>
  
  <p>But, if I select and then unselect the checkmark, then I cannot select the checkmark anymore.</p>
  
  <p>can you  help me?</p>