To make your class always return a single instance of itself, use this init routine.

See also SingletonDesignPattern, SingletonAlternatives,

SINGLETON CLASSES

• (id) init { static YourClass *sharedInstance = nil;

  if (sharedInstance) { [self autorelease]; self = [sharedInstance retain]; } else { self = [super init]; if (self) { sharedInstance = [self retain];

        // initialize
    }   }
  

  return self; }