webView didFinish Navigation 永远不会被调用

Question

我正在尝试让启动视图 (back_button) 在网页完全加载后自动删除，我做了很多研究，他们总是指向相同的代码作为答案。但是，我的不会被调用。有人可以告诉我做错了什么吗？

import UIKit
import WebKit

class ViewController: UIViewController {


    @IBOutlet weak var LoadingView: UIImageView!
    var webView: WKWebView?
    var bgImage: UIImageView?
    var imageViewObject :UIImageView?

    override func viewDidLoad() {
        super.viewDidLoad()

        //var imageViewObject :UIImageView

        let screenSize: CGRect = UIScreen.main.bounds
        imageViewObject = UIImageView(frame:CGRect(x:0,y: 0, width: screenSize.width, height: screenSize.height))
        imageViewObject?.image = UIImage(named:"back_image")
        webView?.navigationDelegate = self as? WKNavigationDelegate
        self.view.addSubview(imageViewObject!)
        let myURL = URL(string: "https://www.google.com")
        let myRequest = URLRequest(url: myURL!)
        _ = webView?.load(myRequest)
    }

    override func loadView() {
        super.loadView()

        //self.view.sendSubview(toBack: imageViewObject)
        //self.view = self.LoadingView
        self.webView = WKWebView()
        self.view = self.webView

    }

    @IBAction func BackButton(_ sender: Any) {

        if(webView?.canGoBack)!
        {
            webView?.goBack();
        }
    }



    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
        print("TEST")
        imageViewObject?.removeFromSuperview()
    }


     func webViewDidFinishLoad(webView: WKWebView) {
        imageViewObject?.removeFromSuperview()
        self.view = self.webView

     }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

Answer 1

你必须通过将这行代码放在 viewDidLoad 中来遵守它的协议委托

webView?.uiDelegate = self

这样做之后，现在如果你想使用委托方法，你必须将你的 viewController 作为 UIWebViewDelegate

的子类

class ViewController: UIViewController ,UIWebViewDelegate{

Answer 2

我通过

解决了这个问题

webView?.naviationDelegate = self

并将其添加到 Class

class ViewController: UIViewController ,WKNavigationDelegate

webView didFinish Navigation 永远不会被调用

webView didFinish Navigation never gets called

xcode

webviewdidfinishload

wkwebview

swift4