解决 UIWebView' was deprecated in ios 12

在 iOS 12.0 中，UIWebView 被弃用了，因此请改用 WKWebView

import UIKit
import WebKit

class ViewController: UIViewController, WKUIDelegate {

    var webView:WKWebView!
    
    override func loadView() {
        let webConfiguration = WKWebViewConfiguration();
        webView = WKWebView(frame: .zero, 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)
    }

}