单例的宏定义
2017-10-25 本文已影响496人
Uncle丶shuai
用宏定义把单例忘了吧。。
#ifndef Singleton_h
#define Singleton_h
#define SingletonInterface(name)+ (instancetype)shared##name;
#define SingletonImplementation(name) \
static id _instance; \
+ (instancetype)shared##name \
{ \
static dispatch_once_t onceToken; \
dispatch_once(&onceToken, ^{ \
_instance = [[self alloc] init]; \
}); \
return _instance; \
} \
+ (instancetype)allocWithZone:(struct _NSZone *)zone \
{ \
static dispatch_once_t onceToken; \
dispatch_once(&onceToken, ^{ \
_instance = [super allocWithZone:zone]; \
}); \
return _instance; \
} \
- (id)copyWithZone:(NSZone *)zone \
{ \
return _instance; \
}
#endif/* Singleton_h */
