title: How can I create a translucent modal UIViewController?
body: <p>I'd like to create a reusable UIViewController subclass that can be shown as a modal view controller over any other view controller.  One of the first things this reusable VC needs to do is pop up a UIActionSheet. In order to do this, I create a default (blank) view in my VC to show the action sheet from.</p>
  
  <p>However, this looks bad because, when the modal vc pops up, the parent vc is hidden.  Thus it looks like the action sheet is floating over a blank background. It'd be better if the action sheet could appear to pop over the original (parent) vc.</p>
  
  <p>Is there a way to achieve this?  Is it safe to simply grab the parent vc's view and animate the UIActionSheet from that? </p>