how do I perform tasks before loading a webview url in ios?-CodePudding

so I can't seem to figure out a way to perform some tasks before loading a url in ios webview. Like in android we can use shouldOverrideUrlLoading.

@Override
public boolean shouldOverrideUrlLoading(final WebView view, String url) {
   ///sometask
}

but I can't find a function that does something like this in ios. Say a user clicked on a href tag inside the webview that takes it to different page, how do I know what link that tag takes the user to? before changing the page.

Basically I want to check what url the webpage is about to load and perform extra steps according to that url.

CodePudding user response：

You can use WKNavigationDelegate

set navigationDelegate in viewDidLoad

self.webView?.navigationDelegate = self

Observe URL in below navigationDelegate Method.

func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: (WKNavigationActionPolicy) -> Void) {
        
        DispatchQueue.main.async {
            if let urlString = navigationAction.request.url?.absoluteString{
                  
                  print(urlString)
             }
         }

    decisionHandler(.allow)
}