Defining Global Constants in Objective-C

Question

I have a constants.h file that looks something like

#ifndef constants_h
#define constants_h

#define MyAdUnitID @"XXXXXXX"
#define GoogleAnalyticsID = @"XXXXX"

#endif

and want to reference it throughout my other implementation files. These are just simple string values that I want as NSString instances throughout my program, but can't seem to get it to work.

If there is a better practice to this, please let me know!

why not just use extern const? try this: http://stackoverflow.com/questions/3497088/objective-c-define-vs-const-vs-static — Polyov, Aug 06 '12 at 01:54

score 7 · Accepted Answer · answered Aug 06 '12 at 01:59

7

Use extern instead of define.

in .h:

extern NSString* SHKFacebookAppID;

in .m:

NSString* SHKFacebookAppID = @"1234567890";

answered Aug 06 '12 at 01:59

fannheyward

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Defining Global Constants in Objective-C

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