Where to store global constants in an iOS application?

Question

Most of the models in my iOS app query a web server. I would like to have a configuration file storing the base URL of the server. It will look something like this:

Answer 1

You could also do a

#define kBaseURL @"http://192.168.0.123/"

in a "constants" header file, say constants.h. Then do

#include "constants.h"

at the top of every file where you need this constant.

This way, you can switch between servers depending on compiler flags, as in:

#ifdef DEBUG
    #define kBaseURL @"http://192.168.0.123/"
#else
    #define kBaseURL @"http://myproductionserver.com/"
#endif