title: Set data in `prepareForSegue` with navigation controller
body: <p>I am developing an iOS application in Swift.</p>
  <p>I want to send data from a view to an other one, using the <code>prepareForSegue</code> function.</p>
  <p>However, my target view is preceded by a navigation controller, so it doesn't work. How can I set data on the VC contained within the navigation controller?</p>