title: How do I make the keyboard go away when a user clicks on the background of the view?
body: <p>I have a UITextField in my iOS app. When a user enters text and clicks Return, the keyboard goes away due to a call to an IBAction with "resignFirstResponder."</p>
  
  <p>However, XCode does not let me drag a line from the UIView itself to File Owner. How do I associate touching the background of a UIView with an IBAction that makes the keyboard go away?</p>