Did Cordova fix this in Cordova iOS 6.0.0?
WKURLSchemeHandler support has been introduced with this release. Using a custom scheme to serve your app content through fixes CORS issues that exist because of the strict security policies that
WKWebView has applied to the
file scheme. You can easily configure your Cordova project to use a custom scheme by setting the preference options
hostname in the
<preference name="scheme" value="app" />
<preference name="hostname" value="localhost" />