GoLiveViewController.swift

var liveRef: DatabaseReference!


override func viewDidLoad() {
   super.viewDidLoad()


   // Do any additional setup after loading the view.
   liveRef = Database.database().reference(withPath: "live")
}


override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
   if segue.identifier == "GoLive" {
       liveRef.child(userName).setValue("true")
       if let banubaView = segue.destination as? ViewController {
           banubaView.roomName = sender as? String
       }
   }
}