Defining constants in Objective-C

There are a few available options for defining constants in Objective-C. I will describe the easiest and most convenient way.



The #define statement allows to declare constants and use them in your programs. To use it simply type the code below in the .m file that will be used.

#define NAME_OF_CONSTANT 12
#define NAME_OF_CONSTANT @"CONST"

or if you want to create a file that will contain all your constants, create a new header file (e.g. "ConstantsFile.h") and type all your constants. In order to use those constants you need to import "ConstantsFile.h" in your implementation (.m) file as below:

#import "ConstantsFile.h"

Enjoy