Swift + Add Pull to Refresh on Table View

var refreshControl:UIRefreshControl!      // An optional variable

func viewDidLoad()

{

        super.viewDidLoad()

        self.refreshControl = UIRefreshControl()

        self.refreshControl.attributedTitle = NSAttributedString(string: "Pull to refersh")

        self.refreshControl.addTarget(self, action: "refresh:", forControlEvents:                 

        UIControlEvents.ValueChanged)

        self.tableView.addSubview(refreshControl)

 }

   func refresh(sender:AnyObject)

  {

     // Code to refresh table view  

  }

At some point you could end refreshing.

self.refreshControl.endRefreshing()