title: pop and refresh viewcontroller
body: <p>I have three viewcontroller. when I get to the third viewcontroller, I use poptorootviewcontroller to pop to my first view controller, but when I use popviewcontroller in my third viewcontroller (i want to go back to my second viewcontroller) its poping but all the info that I edit in my second viewcontroller are there, and I want the secondviewcontroller to be new (reset this viewcontroller), like this viewcontroller to be reloaded.
  here is my code in the third viewcontroller:</p>
  
  <pre><code>-(IBAction)playAgain:(id)sender
  {
     [self.navigationController popViewControllerAnimated:YES];
  }
  </code></pre>
  
  <p>how can I do it?
  thanks!</p>