Using a singleton to create an array accessible by multiple views

Question

It\'s a classic problem.

I would like to access an array of objects from anywhere within my app. I would also like to do this using a singleton. My questions are:

Answer 1

Do your singleton like this:

@interface Singleton : NSObject
@property (nonatomic, retain) NSMutableArray *bananas;
+(Singleton*)singleton;
@end
@implementation Singleton
@synthesize bananas;
+(Singleton *)singleton {
    static dispatch_once_t pred;
    static Singleton *shared = nil;
    dispatch_once(&pred, ^{
        shared = [[Singleton alloc] init];
        shared.bananas = [[NSMutableArray alloc]init];
    });
    return shared;
}
@end

The singleton is initialized the first time you use it. You can call it from anywhere at any time:

NSLog(@"%@",[Singleton singleton].bananas);