Get content Height of WKWebView incorrect

Question

I'm facing the issue with getting content Height of WebView by Whooshkaa playlist link https://player.whooshkaa.com/player/playlist/show/2321?sharing=true.

The WKWebView inside custom View and I'm gonna recalculate frame view after loading WebView success.

I've tried 3 ways:

Create an observer when the webView contentSize changed like this Example.
EvaluateJavaScript like this:

  func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {

    webView.evaluateJavaScript("document.body.offsetHeight") { [weak self] (height, _) in
        guard let height = height as? CGFloat else { return }
        // Still 200
    }
}

---> But all the cases return offsetHeight only 200px. As you can see it's still missing the playlist content bellow.

Is there another way/trick that I can get offsetHeight correctly?

see this for e.g : https://stackoverflow.com/questions/27515236/how-to-determine-the-content-size-of-a-wkwebview — Anbu.Karthik, Jun 01 '18 at 04:47
Try this https://stackoverflow.com/questions/50578817/getting-the-final-rendered-height-of-a-static-page-in-a-wkwebview/50579149#50579149 — U. Benlice, Jun 01 '18 at 05:46
200px seem like the correct number, are you sure you are updating webview height? — ymutlu, Jun 01 '18 at 05:59
@ymutlu It's not correct, pls take a look at the image I posted, and open the link as well. You can see the mismatch between those. — Canh Tran, Jun 01 '18 at 06:01

ymutlu · Answer 1 · 2018-06-01T06:24:09.910

1

200px is min height for the page you have shared. You might need to check your webview frame.

Do not use CGRect.zero for the initial frame, this might cause error loading page. I have added simple code example and it works as it should.

edited Jun 01 '18 at 06:24

answered Jun 01 '18 at 06:02

ymutlu

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Your answer seems like I have to minus the webView frame? I create the WebView with WKWebView(frame: CGRect.zero). My goal is I need to set the frame of webView based on the webView's content size after loading finish. – Canh Tran Jun 01 '18 at 06:09

Get content Height of WKWebView incorrect

1 Answers1