How to get the html content from UIWebView? - ios

Question

I'm loading a web page using UIWebView
let urlStr = "http://duckduckgo.com"
let urlReq = NSMutableURLRequest(URL: NSURL(string: urlStr)!)
webView.loadRequest(urlReq)
Then, when the page has finished loading, I want to access the html content
func webViewDidFinishLoad(webView: UIWebView) {
let href = webView.stringByEvaluatingJavaScriptFromString("window.location.href")
println("window.location.href = \(href)")
let doc = webView.stringByEvaluatingJavaScriptFromString("document")
println("document = \(doc)")
}
But document just return an empty string (Optional("")). The window.location.href part is working fine. What I'm I doing wrong?

Answer 1

I think you have to evaluate the javascript like this:
let doc = webView.stringByEvaluatingJavaScriptFromString("document.documentElement.outerHTML")
In this case you get the entire HTML.

Answer 2

Now, when UIWebView is deprecated, you'll need to use syntax like this:
webView.evaluateJavaScript("document.documentElement.outerHTML") { (html, error) in
guard let html = html as? String else {
print(error)
return
}
// Here you have HTML of the whole page.
}
After that you can create a function like this that'll easily get HTML from webView:
func getHTML(_ completion: #escaping (String) -> ()) {
webView.evaluateJavaScript("document.documentElement.outerHTML") { (html, error) in
guard let html = html as? String else {
print(error)
return
}
completion(html)
}
}
getHTML { html in
// Here you have HTML string
print(html) // for example...
}

Answer 3

I Found the solution of problem regarding jqxWidget.
That UIWebView content were referencing .js and .css file which is already bundled in App. I had just only add the base url of App's MainBundle.
NSString *html = [self.webview1 stringByEvaluatingJavaScriptFromString: #"document.documentElement.outerHTML"]; //document.body.innerHTML
NSString *path = [[NSBundle mainBundle] bundlePath];
NSURL *baseURL = [NSURL fileURLWithPath:path];
[objFullScreenViewCntrl.webview2 loadHTMLString:html baseURL:baseURL];