在ios swift中使用autolayot根据html文本更改webview高度

Question

created a webview which loads html text.

var html_string = "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book."

self.webView.loadHTMLString(html_string, baseURL: nil)

i want set webview height to its content.without scrolling in the webView

Answer 1

Mind that the component is WKWebView , Webview is a thing of the past.

Try this function:

func webViewDidFinishLoad(_ webView: UIWebView) {
    webView.frame.size.height = 1
    webView.frame.size = webView.sizeThatFits(.zero)
    webView.scrollView.isScrollEnabled=false;
    myWebViewHeightConstraint.constant = webView.scrollView.contentSize.height
    webView.scalesPageToFit = true
}

Remember to create an outlet for myWebViewHeightConstraint and updateConstrain as well.

You have a nice day!

Answer 2

Use following code for this, I hope this helps you.

Note:- 'UIWebView' was deprecated in iOS 12.0: No longer supported, So please use WKWebView instead of UIWebView

For UIWebView

func webViewDidFinishLoad(_ webView: UIWebView) {
    webView.frame.size.height = 1
    webView.frame.size = webView.sizeThatFits(.zero)
    webView.scrollView.isScrollEnabled=false;
    myWebViewHeightConstraint.constant = webView.scrollView.contentSize.height
    webView.scalesPageToFit = true
}

For WKWebView

If you want to use WKWebView then you need to do the following things.

1) import WebKit

2) make your ViewController inherit from WKNavigationDelegate

3) hook up the WKWebView's delegate: webView.navigationDelegate = self

4) implement the following protocol function:

func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
    webView.frame.size.height = 1
    webView.frame.size = webView.scrollView.contentSize
}