Objective-C static, extern, public variables

Question

I want to have a variable that I can access anywhere by importing a header file but I also want it to be static in the sense that there is only one of them created. In my .

Answer 1

I normally use this layout for my statics:

NSMutableArray *macroArray;
BOOL keepMacro;

+ (void) startMacro
{
    if (macroArray == nil)
    {
        macroArray = [[NSMutableArray alloc] initWithCapacity:100];
    }

    [macroArray removeAllObjects];
    keepMacro = YES;
}

This is the startMacro command in my application. Both the Bool and the macroArray are static, but notice they are not declared static or extern.

This may not be the best practice, but this is what I do.