Question

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How or where should I store object instances that I require globally within my iOS app?

I have some global object (uses in almost all Application Screens) and mostly they are created right after application starts. I want to have access to this objects from all my ViewControllers (nothing else, only ViewControllers). Where to store it?

I think about @property in AppDelegate but i think (but I can be wrong) this is a ugly solution.

Objects can be quite complex, this is not a simple types.

Answer 1

You can make global objects accessible by placing them in a class with class methods for accessing global objects, implementing +(void)load to prepare these objects, and storing them in static variables.

Header:

@interface GlobalObjects
+(void)load;
+(MyObject1*)myObject1;
@end

Implementation:

#import "GlobalObjects.h"
static MyObject1* _myObject1 = nil;
@implementation GlobalObjects
+(void)load {
    _myObject1 = [[MyObject1 alloc] init];
}
+(MyObject1*)myObject1 {
    return myObject1;
}
@end

Usage:

MyObject1 *shared = [GlobalObjects myObject1];

You could also make the variable static inside its method for lazy initialization.