title: UITableview edit/done button
body: <p>I have a tableview and navigation bar on the top. </p>
  
  <p>I have a Edit button on the left of my navigation bar with the following line of code. </p>
  
  <pre><code>self.navigationItem.leftBarButtonItem = self.editButtonItem;
  </code></pre>
  
  <p>When i click on the edit button, it changes to done button. All is fine so far. </p>
  
  <p>Where do i add code, if i want to do a small operation when the Done button is clicked.?</p>