title: Back navigation in iphone application
body: <p>Is there any way I can <strong>catch the event when I press the back button in my iPhone application</strong>? Right now I am using a button with image named Back on it and defining the action for that.</p>
  
  <p>My client requires default back button pointing to previous screen so based on click event I should be able make it point to particular screen so that title of that screen is shown.</p>
  
  <p>In short i need back button to show the title i required, is it possible?</p>
  
  <p>Thanks in advance.</p>