单例模式的宏抽取

最新推荐文章于 2024-11-30 21:21:05 发布

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最新推荐文章于 2024-11-30 21:21:05 发布

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分类专栏： ios开发文章标签：宏

本文链接：https://blog.youkuaiyun.com/qq_16843991/article/details/53326658

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

#if __has_feature(objc_arc)

#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 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;\
}\
- (oneway void)release{\
}\
- (instancetype)retain{\
    return _instance;\
}\
- (NSUInteger)retainCount{\
    return MAXFLOAT;\
}
#endif