标签：
//.h文件
#define SingletonH(name) \
+(instancetype) shared##name ;
//.m文件
#define SingletonM(name) \
static id instance##name; \
+(instancetype) shared##name { \
return [[self allocWithZone:nil]init]; \
} \
+(instancetype)allocWithZone:(struct _NSZone *)zone{ \
static dispatch_once_t onceToken; \
dispatch_once(&onceToken, ^{ \
instance##name = [super allocWithZone:zone]; \
}); \
return instance##name; \
} \
+(instancetype)alloc { \
return [self allocWithZone:nil];\
}
标签：
原文地址：http://www.cnblogs.com/wlxm/p/4455724.html
