1.注入js代码 （重点）
func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) { let jsGetImages = "function getImages(){" + "var objs = document.getElementsByTagName(\"img\");" + "var imgScr = '';" + "for(var i=0;i<objs.length;i++){" + "imgScr = imgScr + objs[i].src + '+';" + "};" + "return imgScr;" + "};" webView.evaluateJavaScript(jsGetImages, completionHandler: nil) webView.evaluateJavaScript("getImages()") { (data, err) in let imageUrl:String = data as! String var urlArry = imageUrl.components(separatedBy: "+") urlArry.removeLast() self.imgUrlArray.addObjects(from: urlArry) for url in self.imgUrlArray{ let photo = SKPhoto.photoWithImageURL(url as! String) photo.shouldCachePhotoURLImage = false // you can use image cache by true(NSCache) self.images.append(photo) } } var jsClickImage:String jsClickImage = "function registerImageClickAction(){" + "var imgs=document.getElementsByTagName('img');" + "var length=imgs.length;" + "for(var i=0;i<length;i++){" + "img=imgs[i];" + "img.onclick=function(){" + "window.location.href='image-preview:'+this.src}" + "}" + "}" webView.evaluateJavaScript(jsClickImage, completionHandler: nil) webView.evaluateJavaScript("registerImageClickAction()", completionHandler: nil) }
2.使用SKPhotoBrowser框架实现图片预览功能
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 }
总结
以上所述是小编给大家介绍的JS交互点击WKWebView中的图片实现预览效果，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！
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