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

Global declarations are interesting but, for me, what changed deeply my way to code was to have global instances of classes. It took me a couple of day's to really understand how to work with it so I quickly summarized it here

I use global instances of classes (1 or 2 per project, if needed), to regroup core data access, or some trades logics.

For instance if you want to have a central object handling all restaurant tables you create you object at startup and that is it. This object can handle database accesses OR handle it in memory if you don't need to save it. It's centralized, you show only useful interfaces ... !

It's a great help, object oriented and a good way to get all you stuff at the same place

A few lines of code :

@interface RestaurantManager : NSObject
    +(id) sharedInstance;
    -(void)registerForTable:(NSNumber *)tableId;
@end 

and object implementation :

@implementation RestaurantManager

+ (id) sharedInstance {
    static dispatch_once_t onceQueue;

    dispatch_once(&onceQueue, ^{
        sharedInstance = [[self alloc] init];
        NSLog(@"*** Shared instance initialisation ***");
    });
    return sharedInstance;
}

-(void)registerForTable:(NSNumber *)tableId {
}
@end

for using it it's really simple :

[[RestaurantManager sharedInstance] registerForTable:[NsNumber numberWithInt:10]]