How to implement preview effect in JS

func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) { let jsGetImages = "function getImages(){" + "var objs = document.getElementsByTagName(\"img\");" + "var imgScr = '';" + "for(var i=0;i
        

         Copy after login
        
       

func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) { let requestString = navigationAction.request.url?.absoluteString print(requestString!) if (requestString?.hasPrefix("image-preview"))!{ let imgUrl = NSString.init(string: requestString!).substring(from: "image-preview:".count ) let index = imgUrlArray.index(of: imgUrl) let browser = SKPhotoBrowser(photos: images) browser.initializePageIndex(index) present(browser, animated: true, completion: {}) } decisionHandler(.allow) //一定要加上这句话 }