Expose native WebView on iOS/Android (and maybe WebEngine-enabled platforms too?)

I started playing with iOS-specific WebView trying to output a long scrollable list of "cards" that can contain a google map, weather forecast, tweet or whatever else HTMLable, each of this cards is just a QWebView (for now what QML layouts don't really work with these you can re-calculate coordinates periodically).

Trouble is that whenever you go into UI details you need to touch the native implementation once in a while. For example, I wanted to prevent the end/beginning of page bouncing behavior as cards are supposed to be small enough not to bounce. A ready-made solution actually exists, but it's tough to use it without the access to the internal implementation - http://stackoverflow.com/questions/500761/stop-uiwebview-from-bouncing-vertically. Certainly, that is just one example. A lot of things are to be unified across the platforms yet due to myriad of platform-specific details there is always likely to be something platform-specific you'd want to manage.

It would be great if accessing the native implementation could be possible.