title: In iOS 7, using UIModalPresentationCurrentContext for an animated modal presentation doesn't animate
body: <p>In iOS 8, when presenting a modal (lets say with a transparent background), we need to set the segue (or the modal) to use the presentation style of <code>UIModalPresentationOverCurrentContext</code>. This is working as expected.</p>
  
  <p>To accomplish the same thing for iOS 7, you instead, need to set the presenting view controller to have a modal presentation style of <code>UIModalPresentationCurrentContext</code>. Here's where I'm having an issue. I present the modal with animation, but it doesn't animate. After it is presented, everything works fine, even animating the dismissal. Further, if I change the presentation style to <code>UIModalPresentationFullScreen</code>, it animates correctly. </p>
  
  <p>I've searched around and read other posts, but I can't find the cause of this or a solution.</p>