Objective-C Astronomy Library

Question

I need to do some moonrise azimuth and time calculations. Can anyone recommend a good astronomy library, preferably in Objective-C?

Answer 1

Maybe code of opensource projects could fit you? Recently on FLOSS-Weekly was a discussion about Stellarium.

Disclaimer: I didn't look at that source of Stellarium so I have no idea if it is useful at all and unfortunately it is written in C/C++.