I am re-writing with Xcode and Swift two applications (DDB Access, SmartHanzi) initially written with Xamarin and C#. Both apps are with separate macOS and iOS versions (storyboard).
In the original version, XSLT 2.0 transformations were applied with C#. With Swift and WKWebView, after carefully reviewing the documentation, I just found:
XSLT 1.0 transformation for macOS (Swift).
Nothing at all for iOS.
Some years ago, there seemed to be a possibility with an external C library, but it was also mentioned that at a moment it was no more accepted by the App Store.
Did I miss something in the documentation and how can I apply these XSLT 2.0 transformations (preferrably from an XML string but temporary files would be acceptable)?