WKWebView内容加载function永远不会被调用

我试图得到一个函数，我的内容WKWebView完全加载后调用。 我在Apple Swift WKNavigation文档中find了“didFinishNavigation”函数。

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

但是这个函数永远不会被调用。

 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

你没有设置navigationDelegate。 设置它，它应该没事的。

 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)"); } } 

Swift 3的版本更好一些。

 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)") } }