title: Accessing UIPopoverController for UIActionSheet on iPad
body: <p>On the iPad, one can show a UIActionSheet using -showFromBarButtonItem:animated:. This is convenient because it wraps a UIPopoverController around the action sheet and it points the popover's arrow to the UIBarButtonItem that is passed in. </p>
  
  <p>However, this call adds the UIBarButtomItem's toolbar to the list of passthrough views - which isn't always desirable. And, without a pointer to the UIPopoverController, one can't add other views to the passthrough list.</p>
  
  <p>Does anyone know of a sanctioned approach to getting a pointer to the popover controller?</p>
  
  <p>Thanks in advance.</p>