Question

As you can tell, I’m new to Objective-C. I currently have a Singleton working, but I’m trying to use it throughout several methods within the same .m file.

Right now I use this to declare/instantiate the Singleton within a method:

GlobalData *globDat=[GlobalData getInstance];

Do I need to declare it within each method, or is there a way to do this at the top of the .m (or .h?) file so I can access it throughout the other methods?

Thanks…

(BTW I’ve tried placing the line of code shown above under my “@implementation” line, but I get an error: “Initializer element is not a compile-time constant” which I now know is because the line is not within a method.)

Answer 1

You can add a class extension, and store the global data in ivar, like this:

@interface MyClass() {
    GlobalData *globDat;
}
@end

@implementation MyClass

-(id) init {
    self = [super init];
    if (self) {
        globDat=[GlobalData getInstance];
    }
    return self;
}

@end

This will hide the globDat from the interface, and make it available throughout the methods you implement inside your implementation block of MyClass.