Constants in Objective-C
I'm developing a Cocoa application, and I'm using constant NSStrings as ways to store key names for my preferences.
I understand this is a good idea because it allows easy changing of keys if necessary.
Plus, it's the whole 'separate your data from your logic' notion.
Anyway, is there a good way to make these constants defined once for the whole application?
I'm sure that there's an easy and intelligent way, but right now my classes just redefine the ones they use.