xcode做一个桌面应用打开指定url，页面不显示，是哪里的问题呢？

Question

完整代码如下：
import Cocoa
import WebKit

class ViewController: NSViewController, WKUIDelegate
{
var webView: WKWebView!

override func loadView()
    {
    let webConfiguration = WKWebViewConfiguration ();
    webConfiguration.preferences.setValue(true, forKey: "allowFileAccessFromFileURLs");
    webView = WKWebView (frame: CGRect(x:0, y:0, width:1200, height:600), configuration:webConfiguration);
    webView.uiDelegate = self ;
    view = webView;
    }

override func viewDidLoad() {
    super.viewDidLoad()
    
    let myURL = URL(string:"https://www.baidu.com")
    let myRequest = URLRequest(url: myURL!)
    webView.load(myRequest)
}

}

窗口能出来，页面不显示

Answer 1

目测是这儿多了一个感叹号，请采纳！