#define interfaceSingleton(name) +(instancetype)share##name

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