title: issue with swiping a UITableViewCell
body: <p>I would like to do some stuff when a user swipes to the right of a UITableViewCell, so I use</p>
  
  <pre><code>- (void)tableView:(UITableView *)tableView willBeginEditingRowAtIndexPath:(NSIndexPath *)indexPath
  </code></pre>
  
  <p>However I tried to slide to the right and this didn't get invoked, why is this? All of my UITableView delegates are invoked.</p>
  
  <p>I also have this in my code:</p>
  
  <pre><code> - (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
   {
       return YES;
   }
  
  
   // Override to support editing the table view.
   - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
  {
  
  }
  </code></pre>
  
  <p>All I want to do is to add a subview when a swipe happens</p>