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

I'd use a configuration object that initializes from a plist. Why bother other classes with irrelevant external stuff?

I created eppz!settigns soley for this reason. See article Advanced yet simple way to save to NSUserDefaults for incorporating default values from a plist.