As far as I know, there are only two options to get Apple’s system font (San Francisco): native.systemFont and native.systemFontBold. These should be the weights "Regular" and "Bold".
I need the other weights as well, like San Francisco Medium, San Francisco Semibold, etc. Apple says it’s unsafe to load them with their name, because their names might change over the iOS versions (plus, they are hidden, and don’t want to be found), as described here: https://stackoverflow.com/questions/31369711/how-to-use-new-san-francisco-font-in-ios-9
Is there any way to use the other weights as well?