WKWebView style.webkitTextSizeAdjust works on iPhone, but not on iPad

Question

runitalready OP

Created Jan ’23

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I use WKWebView to display a web page in my app that has custom fonts with hard coded font sizes.

Based on the dynamic type text size specified in the settings app by the user, I want to set a certain zoom level on the web page like this (using WKNavigationDelegate):

- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation 
{
[webView evaluateJavaScript:@"document.getElementsByTagName('body')[0].style.webkitTextSizeAdjust='120%'" completionHandler:nil];
}

This works just fine on iPhone, but on iPad the zoom level stays at 100%.

Any ideas?

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Answer 1

runitalready OP

Jan ’23

Found it (via https://trac.webkit.org/changeset/261940/webkit) - to force the old iPad behavior set

_webView.configuration.defaultWebpagePreferences.preferredContentMode = WKContentModeMobile;

0