How to define a global variable in objective c?

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How to use global variables in Objective-C?

I want to know how can i define global variable in Objective-c?

score 0 · Answer 1 · edited Oct 24 '11 at 12:02

0

You might want to check the definition of singleton.

edited Oct 24 '11 at 12:02

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answered Oct 24 '11 at 11:45

Sergey Lost

This is the best approach to attack this problem.Here's a link explaining what a singleton is http://developer.apple.com/library/mac/#documentation/General/Conceptual/DevPedia-CocoaCore/Singleton.html – El Developer Oct 24 '11 at 12:01

score 0 · Answer 2 · answered Oct 24 '11 at 11:49

0

You can use app-delegate or create shared instance of a class.

answered Oct 24 '11 at 11:49

sach

score 0 · Answer 3 · answered Oct 24 '11 at 12:01

0

There are two approaches:

(Well, actually 2.5, since simply using a static variable is a more primitive version of singleton.)

answered Oct 24 '11 at 12:01

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score -1 · Answer 4 · answered Oct 24 '11 at 11:47

You should create a header file like

  // Constants.h
    extern NSString * const Constant1;
    extern NSString * const Constant2;

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 Constant1 = @"FirstConstant";
NSString * const Constant2 = @"SecondConstant";

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