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at April 22, 2010 11:36 by LeeProbert
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// // SynthesizeSingleton.h // CocoaWithLove // // Created by Matt Gallagher on 20/10/08. // Copyright 2009 Matt Gallagher. All rights reserved. // // Permission is given to use this source code file without charge in any // project, commercial or otherwise, entirely at your risk, with the condition // that any redistribution (in part or whole) of source code must retain // this copyright and permission notice. Attribution in compiled projects is // appreciated but not required. // #define SYNTHESIZE_SINGLETON_FOR_CLASS(classname) \ \ static classname *shared##classname = nil; \ \ + (classname *)shared##classname \ { \ @synchronized(self) \ { \ if (shared##classname == nil) \ { \ shared##classname = [[self alloc] init]; \ } \ } \ \ return shared##classname; \ } \ \ + (id)allocWithZone:(NSZone *)zone \ { \ @synchronized(self) \ { \ if (shared##classname == nil) \ { \ shared##classname = [super allocWithZone:zone]; \ return shared##classname; \ } \ } \ \ return nil; \ } \ \ - (id)copyWithZone:(NSZone *)zone \ { \ return self; \ } \ \ - (id)retain \ { \ return self; \ } \ \ - (NSUInteger)retainCount \ { \ return NSUIntegerMax; \ } \ \ - (void)release \ { \ } \ \ - (id)autorelease \ { \ return self; \ }
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This class is used to turn an object into a singleton. Usage : SYNTHESIZE_SINGLETON_FOR_CLASS(ClassName); Place in your implementation. thank you Matt Gallagher
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SynthesizeSingleton definition header
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Objective C