Singleton implementation in iOS on Objective-C
Just read this very helpful article on implementing a singleton in iOS. Below is a simple snippet that is thread safe, and is indeed, faster than @synchorize when is executed. +(MyClass *)singleton { static dispatch_once_t pred; static MyClass *shared = nil; dispatch_once(&pred, ^{ shared = [[MyClass alloc] init]; }); return shared; } dispatch_once() function is indeed mentioned in Mac Developer Library that is useful in implementing singletons or global data. Hope you found this helpful.