Intercept request with WKWebView

Question

Now i\'m using UIWebView and with canInitWithRequest: of NSURLProtocol i can intercept all requests and do with it what I want.

In

Answer 1

You can intercept requests on WKWebView since iOS 8.0 by implementing the decidePolicyFor: navigationAction: method for the WKNavigationDelegate

 func webView(_ webView: WKWebView, decidePolicyFor 
       navigationAction: WKNavigationAction, 
       decisionHandler: @escaping (WKNavigationActionPolicy) -> Swift.Void) {

    //link to intercept www.example.com

    // navigation types: linkActivated, formSubmitted, 
    //                   backForward, reload, formResubmitted, other

    if navigationAction.navigationType == .linkActivated {
        if navigationAction.request.url!.absoluteString == "http://www.example.com" {
            //do stuff

            //this tells the webview to cancel the request
            decisionHandler(.cancel)
            return
        }
    }

    //this tells the webview to allow the request
    decisionHandler(.allow)

}