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

I recommend PJ Naughter's AA+ library. It is based on the Astronomical Algorithms book by Meeus. The library is quite comprehensive and written in C++ (easily called from Objective-C). My iOS app Lúan uses this library.