For handling Universal Links

gistfile1.txt

func application(application: UIApplication, continueUserActivity userActivity: NSUserActivity, restorationHandler: ([AnyObject]?) -> Void) -> Bool {
        
    guard let rootViewCntrlr = self.window?.rootViewController else {
      return false;
    }
        
    guard let viewCntrlr = rootViewCntrlr as? ViewController else {
      return false;
    }
        
  viewCntrlr.URLLabel.text = userActivity.webpageURL?.absoluteString;
        
  return true
}