title: How can I get the indexPath of UIButton in a customized tableViewCell?
body: <p>I created a tableViewCell the include an image, two text labels and a uibutton.
  The button is allocated to an action method (e.g. viewButtonPused:sender).</p>
  
  <p>I'm used to handle row selection with tableView:didSelectRowAtIndexPath: so I could tell which row was selected. But with the uibutton and its action method .... How can I tell?</p>
  
  <p>Thanks in advance.</p>