objective c - iOS Prefix.pch best practices

Question

I have seen many developers that add various convenience macros to the Prefix.pch of their iOS projects.

What do (or don't) you recommend adding to the iOS Prefix.pch file? What does your Prefix.pch look like?

Answer 1

Ewww… don't put macros in a .pch file! A .pch file is, by definition, a project specific precompiled header. It really shouldn't be used beyond the context of the project and it really shouldn't contain anything but #includes and #imports.

If you have some macros and such that you want to share between headers, then stick 'em in a header file of their own — Common.h or whatever — and #include that at the beginning of the .pch.