Question

我已经为Cocoa Touch Framework创建了示例应用程序，并且已经通过带有示例网址的WKWebView。我在其中一个应用程序中使用了该框架，并尝试从主类中打开wkwebview。下面是我的可可触摸框架代码。它始终显示我无法发出信号服务com.apple.WebKit.Networking：113：在控制台中找不到指定服务此消息。

import UIKit
import WebKit

public class ConnectedAppController: UIViewController, WKNavigationDelegate {

    var webView : WKWebView!

  override public func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.

    }

  public func opensampleWebView() {

    let myBlog = "https://www.google.com/"
    let url = NSURL(string: myBlog)
    let request = URLRequest(url: url! as URL)

    // init and load request in webview.
    webView = WKWebView(frame: self.view.frame)
    webView.navigationDelegate = self
    self.view.addSubview(webView)
    webView.load(request)
  }

  private func webView(webView: WKWebView, didFailProvisionalNavigation navigation: WKNavigation!, withError error: Error) {
    print(error.localizedDescription)
  }
  public func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {
    print("Strat to load")
  }
  public func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
    print("finish to load")
  }

Answer 1

您的问题并不明显，但我怀疑您是在另一个班级的opensampleWebView来电中致电prepareForSegue。

虽然您在self.view.addSubview(webView)之前正确地呼叫webView.load(request)，但我怀疑您尝试添加到尚未加载的视图。

如果您在opensampleWebView()中致电viewDidLoad，有什么不同吗？

override public func viewDidLoad() {
    super.viewDidLoad()
    opensampleWebView()
 }

Answer 2

您需要覆盖 loadView（）

功能

Swift 4

public class ConnectedAppController: UIViewController, WKNavigationDelegate {

    var webView : WKWebView!

    override func loadView() {
        webView = WKWebView()
        webView.navigationDelegate = self
        view = webView
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        self.webView.allowsBackForwardNavigationGestures = true
        let myBlog = "https://www.google.com/"
        if let url = URL(string: myBlog) {
            self.webView.load(URLRequest(url: url))
        }

    }

}

WKWebView无法在Cocoa Touch Framework中运行

2 个答案: