title: Sending data back to previous controller using unwind segue?
body: <p>I have two controllers in the storyboard, and there is a segue to switch between these.</p>
  
  <p>Passing data from the first controller to the second one is pretty straightforward by implementing prepareForSegue, and set the properties of the second controller using segue.destinationViewController.</p>
  
  <p>I should pass back data to the from the second controller to the previous one also. I googled, but I have not found any simple, but working code to demonstrate it.</p>
  
  <p>Would you be so kind give me a simple sample about the best way to do it?</p>