关于WKWebView显示网页的问题

import UIKit

import WebKit



class ViewController: UIViewController {



    override func viewDidLoad() {

        super.viewDidLoad()

       

        let theCOnfiguration= WKWebViewConfiguration()

        let webview = WKWebView(frame: self.view.frame, configuration: theConfiguration)

        self.view.addSubview(webview)

        webview.loadRequest(NSURLRequest(URL: NSURL(string: "http://baidu.com")!))

    }



    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

        // Dispose of any resources that can be recreated.

    }

}