WKWebView中的webViewDidFinishLoad

Question

我必须从UIWebView迁移到WKWebView，在这方面我遇到了一些问题。看起来"WKWebView“没有成员”request“。有没有办法使用WKWebView来处理这种情况？我只需要加载网址，然后如果它包含".pdf“只显示一个按钮。

func webViewDidFinishLoad(_ webView : WKWebView) {
    UIApplication.shared.isNetworkActivityIndicatorVisible = false

    if (webView.request?.url!.absoluteString)!.range(of: ".pdf") != nil {
        pdfBackButton.isHidden = false
    }
    else {
    pdfBackButton.isHidden = true}

}

Answer 1

将"WebKit"框架添加到类中。

override func viewDidLoad() {
     super.viewDidLoad()
     let myWebView:WKWebView = WKWebView(frame: CGRect(x: 0.0, y: 0.0, width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height))
     myWebView.navigationDelegate = self;
     let url = URL(string: "https://www.Apple.com")!
     myWebView.load(URLRequest(url: url))
     self.view.addSubview(myWebView)
}

然后实现WKNavigationDelegate方法

func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
    UIApplication.shared.isNetworkActivityIndicatorVisible = false
    let url = webView.url
    print(url as Any) // this will print url address as option field
    if url?.absoluteString.range(of: ".pdf") != nil {
         pdfBackButton.isHidden = false
         print("PDF contain")
    }
    else {
         pdfBackButton.isHidden = true
         print("No PDF Contain")        
    } 
}

希望这能对你有所帮助！

Answer 2

您可以实现WKNavigationDelegate webView(_:didFinish:)函数。

func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
    UIApplication.shared.isNetworkActivityIndicatorVisible = false
    let url = webView.url

    if url?.absoluteString.range(of: ".pdf") != nil {
        pdfBackButton.isHidden = false
    }
    else {
        pdfBackButton.isHidden = true
    }
}