title: Swift Pass data from ViewController to one subview of TabBarController
body: <p>I have two <code>subview</code> in my <code>TabBarcontroller</code> and one of this, is connected with a one  <code>ViewController</code>
  I would bring the <code>Label.text</code> from <code>Viewcontroller</code> to the first subview of my <code>TabBar</code> and I tryed with </p>
  
  <pre><code>override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
      if segue.identifier == "returnView"{
          var destVC = segue.destinationViewController as ViewController
          destVC.str = "\(helloLabel.text)"
      }
  }
  </code></pre>
  
  <p>But don't go , how can I do ?</p>