     
     override func viewDidLoad() {
         super.viewDidLoad()
-
+        
         // Do any additional setup after loading the view.
         setupUI()
         NotificationCenter.default.addObserver(self, selector: #selector(whenLoginIsSucess), name: NSNotification.Name(rawValue: loginSuccess), object: nil)
     }
-
+    
     override func didReceiveMemoryWarning() {
         super.didReceiveMemoryWarning()
         // Dispose of any resources that can be recreated.

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int{
        return 0
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell{
        return UITableViewCell()
    }

        visitorView?.delegate = self
        view.addSubview(visitorView!)
    }
    
}

// MARK: - UI相关
