单例抽取成宏

代码能够下载，连接在最下面，也能够直接复制下面的代码，本身新建一个类。

用法及其简单。例如

.h文件

#import <Foundation/Foundation.h>

//引入头文件

#import "singleton.h"

@interface DBTools : NSObject

//.h的宏

singleton_h(DBTools)

@end

.m文件

#import "DBTools.h"

 

@implementation DBTools

//.m的宏

singleton_m(DBTools)

@end

 

 

//============这是抽取的内容=================

 

#if __has_feature(objc_arc) //ARC

//.h 拼接参数使用##

#define singleton_h(name) +(instancetype)sharad##name;

 

//.m 宏里面换行

#define singleton_m(name) static id _instanceType;\

+(instancetype)sharad##name\

{\

static dispatch_once_t onceToken;\

dispatch_once(&onceToken, ^{\

_instanceType = [[self alloc]init];\

});\

return _instanceType;\

}\

+ (instancetype)allocWithZone:(struct _NSZone *)zone\

{\

static dispatch_once_t onceToken;\

dispatch_once(&onceToken, ^{\

_instanceType = [super allocWithZone:zone];\

});\

return _instanceType;\

}\

-(id)copyWithZone:(NSZone *)zone\

{\

return _instanceType;\

}

 

 

#else //MRC

//.h 拼接参数使用##

#define singleton_h(name) +(instancetype)sharad##name;

 

//.m 宏里面换行

#define singleton_m(name) static id _instanceType;\

+(instancetype)sharad##name\

{\

static dispatch_once_t onceToken;\

dispatch_once(&onceToken, ^{\

_instanceType = [[self alloc]init];\

});\

return _instanceType;\

}\

+ (instancetype)allocWithZone:(struct _NSZone *)zone\

{\

static dispatch_once_t onceToken;\

dispatch_once(&onceToken, ^{\

_instanceType = [super allocWithZone:zone];\

});\

return _instanceType;\

}\

-(id)copyWithZone:(NSZone *)zone\

{\

return _instanceType;\

}\

-(oneway void)release\

{\

    \

}\

-(instancetype)retain\

{\

    return _instanceType;\

}\

-(instancetype)autorelease\

{\

    return _instanceType;\

}\

- (NSUInteger)retainCount\

{\

    return 1;\

}

 

 

 

#endif

 

 

 

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