title: Event willAnimateRotationToInterfaceOrientation isn't calling
body: <p>I have several <code>UIViewController</code>s on the application. But only on one of them <code>willAnimateRotationToInterfaceOrientation</code> event is calling.</p>
  
  <p>How to make <code>willAnimateRotationToInterfaceOrientation</code> work for all visible views?</p>