RWSingleton

A macro to create singleton class quickly in ObjC

##Motivation CWLSynthesizeSingleton inspires me to change it a little bit. It is better to use dispatch_once_t. Meanwhile, to avoid performance degradation I did not perform lock on getting shared instance, I leave these tasks to developer themselves according to their implemetations.

Usage

Supposing a desired singleton class named MyOjbect. in MyOjbect.h, a single line is adde as:

#import "RWSingletonMacro.h"
@interface MyObject : NSObject
RW_DECLARE_SINGLETON_FOR_CLASS_WITH_ACCESSOR(MyObject, sharedObject)
@end

in MyObject.m:

#import "MyObject.h"
@implementation MyObject
RW_SYNTHESIZE_SINGLETON_FOR_CLASS_WITH_ACCESSOR(MyObject, sharedObject)
@end

Also, you can overwrite -(id)init method to do your custom initialization:

#import "MyObject.h"
@implementation MyObject
RW_SYNTHESIZE_SINGLETON_FOR_CLASS_WITH_ACCESSOR(MyObject, sharedObject)

- (id) init
{
  self = [super init];
  //do your things
  return self
}
@end