Question

I want to do:

#include "MyClass.h"

MyClass *obj = new MyClass();

I tried it in main.mm, inside main(), in my appDelegate.mm and inside application:didFinishLaunchingWithOptions. But none of those seem to work.

Otherwise I have to pass the pointer into every object. This involves another interface, more method calls and more #includes.

Thank you

Answer 1

Yes, it’s perfectly possible.

Just remember to use extern keyword in the translation units you are going to use the global variable.

For example, in you main.m file:

NSString* yourGlobalStr = [[NSString alloc] initWithString:@"Global!"];

And where you are going to use it, in other_file.m put:

extern NSString* yourGlobalStr;

- (void) m
{
    NSLog(yourGlobalStr);
}