title: swift refreshcontrol, endRefreshing not working
body: <p>I'm having hard time to end the pull to refresh feature.</p>
  
  <p>Even if I call the endRefreshing() on refershControl, the spinner stays there.  The tableview is refreshed properly though.</p>
  
  <p>Here is my swift code : </p>
  
  <pre><code>@IBAction func refereshInvoked() {
      refresh_data()
      self.refreshControl.endRefreshing()
  }
  </code></pre>
  
  <p>Since I'm pretty new with Swift and Cocoa, I'm probably doing something wrong.</p>
  
  <p>Thank you</p>