override func viewDidLoad() {
        super.viewDidLoad()
       
        let url = URL(string: "<http://www.campus-taxi.com/>")
        let request = URLRequest(url: url!)
        // self.webView?.allowsBackForwardNavigationGestures = true  //뒤로가기 제스쳐 허용
...
webView.scrollView.bounces = false //<--상하 스크롤 제거