在 Swift 中从 WKWebview 获取 HTML [英] Get HTML from WKWebview in Swift

问题描述

我使用 WKWebView 登录网站，现在我想解析网站的 html.如何快速访问网站 html?我知道它如何适用于 UIWebView 但不适用于 WKWebView.

I log into a website using WKWebView and now i would like to parse the html of the website. How can I access the websites html in swift? I know how it works for a UIWebView but not for WKWebView.

感谢您的帮助！

推荐答案

如果您等到页面加载完毕，您可以使用:

If you wait until the page has loaded you can use:

webView.evaluateJavaScript("document.documentElement.outerHTML.toString()", 
                           completionHandler: { (html: Any?, error: Error?) in
    print(html)
})

您也可以注入一些 javascript 来返回 HTML.

You could also inject some javascript that returns you back the HTML.

let script = WKUserScript(source: javascriptString, injectionTime: injectionTime, forMainFrameOnly: true)
userContentController.addUserScript(script)
self.webView.configuration.userContentController.addScriptMessageHandler(self, name: "didGetHTML")

…

func userContentController(userContentController: WKUserContentController,
        didReceiveScriptMessage message: WKScriptMessage) {

        if message.name == "didGetHTML" {
            if let html = message.body as? String {
                print(html)
            }
        }
}

您可以注入的 javascript 如下所示:

The javascript you could inject looks something like:

webkit.messageHandlers.didGetHTML.postMessage(document.documentElement.outerHTML.toString());

这篇关于在 Swift 中从 WKWebview 获取 HTML的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！