title: UIViewControllerTransitioningDelegate landscape Transition
body: <p>What is the best practice to create landscaped transition between two UIViewControllers? The containerView</p>
  
  <pre><code>UIView * container      = [transitionContext containerView];
  </code></pre>
  
  <p>logs the frame : <code>{{0, 0}, {320, 568}}</code> which is vertical and any added subview is added vertically. Should I rotate added subviews or add subviews to on of the controllers view and not the container view directly?</p>