Does iOS support bitmap font in any form to use in UIKit classes?
As of iOS 3.2, you can add any font you like to the list that UIKit will accept via the UIAppFonts info.plist key. It doesn't support any bitmap file types directly, but you can convert a bitmap font to a TTF using methods such as this one — which involves using an open source piece of software called FontForge along with a bitmap font tracer called autotrace to create (with some manual assistance) a vector description of the bitmap font.
Other answers to that same StackOverflow question report some success with populating a TTF directly with bitmap data. Your mileage may vary.