The San Francisco Font is divided into 2 categories: Text And Display.
When I use the UIFont.systemFontOfSize it returns only San Francisco fonts of the Display category.
Is there a way to get the Text Category instead ?
How to get the San Francisco Font "Text" Category
Not sure sure you're allowed to use it for anything but UI.
There is a stack overflow question that seems to cover this
http://stackoverflow.com/questions/33815130/new-san-francisco-text-font-with-systemfontofsize