单例模式的宏定义以及带参数的宏

// Single.pch
// 多线程
// Created by WYC on 17/5/4.
// Copyright © 2017年 ssss. All rights reserved.
//ARC情况下
// ''宏定义的连接符
//带参数的宏 singleH(name) 其中name是参数
//share##name ##后面是要替换的参数
#if __has_feature(objc_arc)

#define singleH(name)  +(instancetype)share##name;

#define singleM(name) static id _instance;\
+(instancetype)allocWithZone:(struct _NSZone *)zone{\
    static dispatch_once_t onceToken;\
    dispatch_once(&onceToken, ^{\
        _instance = [super allocWithZone:zone];\
    });\
    return _instance;\
}\
+(instancetype)share##name{\
    return [[self alloc] init];\
}\
-(id)copyWithZone:(NSZone *)zone{\
    return _instance;\
}\
-(id)mutableCopyWithZone:(NSZone *)zone{\
    return _instance;\
}


#else
#define singleH  +(instancetype)shareTools;

#define singleM static id_instance;\
+(instancetype)allocWithZone:(struct _NSZone *)zone{\
static dispatch_once_t onceToken;\
dispatch_once(&onceToken, ^{\
_instance = [super allocWithZone:zone];\
});\
return _instance;\
}\
+(instancetype)shareTools{\
return [[self alloc] init];\
}\
-(id)copyWithZone:(NSZone *)zone{\
return _instance;\
}\
-(id)mutableCopyWithZone:(NSZone *)zone{\
return _instance;\
-(oneway void)release\
{\
{\
-(instancetype)retain\
{\
    return _instance;\
}\
-(NSUInteger)retainCount\
{\
    return MAXFLOAT;\
}

#endif