Singletons in Objective-C

Aug 26th, 2011

I recently switched to a new way of implementing singletons in Objective-C. Since most of my code now is iOS 4.0+ I started using GCD and blocks as recommended by Luke Redpath (ARC compatible):

+ (id) sharedInstance { static dispatch_once_t predicate = 0; __strong static id shared = nil; dispatch_once(&predicate, ^{ shared = [[self alloc] init]; }); return shared; }

Joris Kluivers

I like to build software.

Singletons in Objective-C