title: Activity Indicator not showing on view controller
body: <p>I am trying to figure out why my activity indicator is not showing on my view controller, here is my code below</p>
  
  <pre><code>var activityIN : UIActivityIndicatorView = UIActivityIndicatorView(frame: CGRectMake(0,0, 50, 50)) as UIActivityIndicatorView
          activityIN.center = self.view.center
          activityIN.hidesWhenStopped = true
          activityIN.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.Gray
          activityIN.startAnimating()
  </code></pre>