title: How to reload the previous view controller on back button?
body: <p>I have two view controller <strong>A</strong> &amp; <strong>B</strong>.On <code>ViewController</code> <strong>A</strong> i am displaying data from server.I have nav button Update to go to <code>ViewController</code> <strong>B</strong>.On <strong>B</strong> i can update the data which was shown on <code>ViewController</code> <strong>B</strong>.Now when data is updated on server i show an alert <strong>'Update Success'</strong> on click of Ok i go to previous <code>ViewController</code>.But i don't see the updated data because i removed the <code>ViewController</code> <strong>B</strong> from stack but <strong>A</strong> is not reloded.</p>
  
  <p><strong>Code for going back to ViewController A</strong></p>
  
  <pre><code>  [self.navigationController popViewControllerAnimated:YES];
  </code></pre>