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
}
注:可根据需求更改代码
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