Integer constants

If I declare a string constant like so:

You should create a header file like

// Constants.h
extern NSString * const MyFirstConstant;
extern NSString * const MySecondConstant;
//etc.

You can include this file in each file that uses the constants or in the pre-compiled header for the project.

You define these constants in a .m file like

// Constants.m

NSString * const MyFirstConstant = @"FirstConstant";
NSString * const MySecondConstant = @"SecondConstant";

What do I do to define integer constants?

Thanks,

Dan

From stackoverflow

• Replace NSString* with NSInteger.

  This is true of any constant type, be it a primitive such as int/float, or a class such as NSString or NSInteger.

  The only thing to be aware of is whether you desire a constant or a pointer to a constant (such as withNSString), and how it's initialized in the .m file

  Integer example:

  // constants.h
  extern NSInteger const MyIntegerConstant;
  
  // constants.m
  NSInteger const MyIntegerConstant = 666;
  

  (Note: for the reason why NSInteger instead of just regular "int", see this post)

  Class example:

  // constants.h
  extern MyClass* const MyClassConstant;
  
  // constants.m
  MyClass* const MyClassConstant= [[MyClass alloc] initWith: paramOne and:paramTwo];
  

  Dan Morgan : Thanks andrew - Were would this class be deallocated?

  Andrew Grant : It wouldn't be, it's memory would be cleaned up when the program exits. If you wish to have manual control over this you can add initializeConsts / releaseConsts functions to the beginning/end of your program

  Dan Morgan : Thanks andy - I'm using the above code in my add and I'm getting the compile error in my Switch statements: "MyIntegerConstant" does not equate to an integer

  Andrew Grant : Post the code in a separate question!