title: How can I find the UIPopoverController from the UIViewController being displayed in a popover?
body: <p>Using an instance of a UIViewController, is there any way I can find the UIPopoverController being used to present it? I would also want to find the UIViewController that displayed the UIPopoverController in the first place.</p>
  
  <p>I would normally use a delegate or other sort of notification to send a signal from the displayed view controller to the displaying one, but in this case I'm trying to create a reusable custom segue that dismisses the popover and then moves on to another view in the main view.</p>