title: I keep getting a SIGABRT error when programming making a draggable label?
body: <p>I am trying to make a Draggable label programmatically, I can get the Label to appear but as soon as I try to drag it I throw the error. Any suggestions? There is absolutely nothing else on the screen. it is an empty View controller to start with.</p>
  
  <pre><code> override func viewDidLoad() {
      super.viewDidLoad()
      // Do any additional setup after loading the view, typically from a nib.
  
      let label = UILabel(frame: CGRectMake(self.view.bounds.width / 2 - 100 , self.view.bounds.height / 2 - 50, 200, 100))
      label.text = "Drag Me!"
      label.textAlignment = NSTextAlignment.Center
      self.view.addSubview(label)
  
      let gesture = UIPanGestureRecognizer(target: self, action: Selector("Was Dragged:"))
      label.addGestureRecognizer(gesture)
      label.userInteractionEnabled = true
  }
  </code></pre>