title: push uiviewcontroller to another viewcontroller with animation from Top - bottom
body: <p>In my project there is feature when user swipe on top bar one screen will appear with top to bottom animation</p>
  
  <p>There are two view controller
  oneviewcontroller.m</p>
  
  <pre><code>- (void)swipe
  {
      listViewController *list_obj=[[listViewController alloc] initWithNibName:@"listViewController" bundle:NULL];
      UIViewAnimationTransition trans = UIViewAnimationTransitionCurlUp;
      [UIView beginAnimations: nil context: nil];
      [UIView setAnimationTransition: trans forView: [self.view window] cache: YES];
      [self.navigationController pushViewController:list_obj animated:YES];
      [UIView commitAnimations];
  }
  </code></pre>
  
  <p>But this does not give the animation from top-bottom</p>
  
  <p>I want to implement the navigation from 
  Push := top - bottom
  Pop : = bottom - top</p>
  
  <p>please help me
  Thank you</p>