title: when uiactionsheet show,click button of uiactionsheet,uiviewcontroller not support rotate
body: <p>When I use <code>UIActionSheet</code> in my view controller, my viewcontroller support four directions，I create a <code>UIActionSheet</code>,and show <code>UIActionSheet</code>. When I touch a button of <code>UIActionSheet</code>, the <code>UIActionSheet</code> dismiss, then rotate my iPhone, my view controlle not support rotate. not execute the delegate of rotate,such as:</p>
  
  <pre><code>- (BOOL)shouldAutorotate
  {
  }
  - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
  {
  }
  </code></pre>