一个人命中最大的幸运，莫过于在他人生中途，即在他年富力强时发现了自己生活的使命。
- Swift 4.0
- WKWebView
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.rel="nofollow noopener noreferrer" 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网站的支持！
到此这篇关于JS交互点击WKWebView中的图片实现预览效果就介绍到这了。聪明在于学习，天才在于积累。所谓天才，实际上是依靠学习。更多相关JS交互点击WKWebView中的图片实现预览效果内容请查看相关栏目，小编编辑不易，再次感谢大家的支持！
