title: IOS Orientation not changing after back from another controller
body: <p>i'am newbe in IOS development and it's my first app dealing with different orientations on both iPad and iPhone..</p>
  
  <p>Here is the scenario,
  i implement this function to deal with orientation and it's work fine for me.</p>
  
  <pre><code>- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
  </code></pre>
  
  <p>But when i go to another page and change the orientation(eg: landscape) and then comeback again to the first page(eg: still in landscape mode), the background of UIImage not change anymore..</p>
  
  <p>I would really appreciate of any answer, thanks</p>