ios - objective - La función WKWebView Content loaded nunca se llama

wkwebview ionic

Question

Intento obtener una función llamada después de que mi Contenido dentro de WKWebView esté completamente cargado. Encontré la función "didFinishNavigation" en la documentación de Apple Swift WKNavigation.

func webView(webView: WKWebView!, didFinishNavigation navigation: WKNavigation!) {
    println("WebView content loaded.")
}

Pero la función nunca se llama.

import UIKit
import WebKit

class ViewController: UIViewController WKNavigationDelegate {

   override func loadView() {
       super.loadView()

       self.webView = WKWebView(frame:self.containerView.frame, configuration: WKWebViewConfiguration())
       self.containerView.addSubview(webView!)
       self.containerView.clipsToBounds = true

   }

   override func viewDidLoad() {
       super.viewDidLoad()

       var url = NSURL(string:"http://google.com/")
       var req = NSURLRequest(URL:url)
       self.webView!.loadRequest(req)
   }

   func webView(webView: WKWebView!, didFinishNavigation navigation: WKNavigation!) {
       println("WebView content loaded.")
   }

}

Answer 1

No está configurando NavigationDelegate. Configúralo y debería estar bien.

class ViewController: UIViewController, WKNavigationDelegate {


  override func viewDidLoad() {
    super.viewDidLoad()

    let noLayoutFormatOptions = NSLayoutFormatOptions(rawValue: 0)

    let webView = WKWebView(frame: CGRectZero, configuration: WKWebViewConfiguration())
    webView.setTranslatesAutoresizingMaskIntoConstraints(false)
    webView.navigationDelegate = self
    view.addSubview(webView)

    view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:|[webView]|", options: noLayoutFormatOptions, metrics: nil, views: ["webView": webView]))

    view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("H:|[webView]|", options: noLayoutFormatOptions, metrics: nil, views: ["webView": webView]))

    let url = NSURL(string: "http://google.com")
    let request = NSURLRequest(URL: url)
    webView.loadRequest(request)
  }

  func webView(webView: WKWebView!, didFinishNavigation navigation: WKNavigation!) {
    print("Finished navigating to url /(webView.url)");
  }

}

Y aquí hay una versión un poco mejor con Swift 3.

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        let configuration = WKWebViewConfiguration()
        let webView = WKWebView(frame: .zero, configuration: configuration)
        webView.translatesAutoresizingMaskIntoConstraints = false
        webView.navigationDelegate = self
        view.addSubview(webView)

        [webView.topAnchor.constraint(equalTo: view.topAnchor),
         webView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
         webView.leftAnchor.constraint(equalTo: view.leftAnchor),
         webView.rightAnchor.constraint(equalTo: view.rightAnchor)].forEach  { anchor in
            anchor.isActive = true
        }

        if let url = URL(string: "https://google.com/search?q=westworld") {
            webView.load(URLRequest(url: url))
        }
    }

}

  extension ViewController: WKNavigationDelegate {

    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
        print("Finished navigating to url /(webView.url)")
    }

}