本篇文章主要介绍了"单例抽取成宏"，主要涉及到宏方面的内容，对于移动开发感兴趣的同学可以参考一下：
代码可以下载链接，可以直接复制。#if __has_feature(objc_arc) //ARC//.h 拼接参数使用###define singleton_...
代码可以下载链接，可以直接复制。
#if __has_feature(objc_arc) //ARC
//.h 拼接参数使用##
#define singleton_h(name) +(instancetype)sharad##name;
//.m 宏里面换行
#define singleton_m(name) static id _instanceType;\
+(instancetype)sharad##name\
{\
static dispatch_once_t onceToken;\
dispatch_once(&onceToken, ^{\
_instanceType = [[self alloc]init];\
});\
return _instanceType;\
}\
+ (instancetype)allocWithZone:(struct _NSZone *)zone\
{\
static dispatch_once_t onceToken;\
dispatch_once(&onceToken, ^{\
_instanceType = [super allocWithZone:zone];\
});\
return _instanceType;\
}\
-(id)copyWithZone:(NSZone *)zone\
{\
return _instanceType;\
}
#else //MRC
//.h 拼接参数使用##
#define singleton_h(name) +(instancetype)sharad##name;
//.m 宏里面换行
#define singleton_m(name) static id _instanceType;\
+(instancetype)sharad##name\
{\
static dispatch_once_t onceToken;\
dispatch_once(&onceToken, ^{\
_instanceType = [[self alloc]init];\
});\
return _instanceType;\
}\
+ (instancetype)allocWithZone:(struct _NSZone *)zone\
{\
static dispatch_once_t onceToken;\
dispatch_once(&onceToken, ^{\
_instanceType = [super allocWithZone:zone];\
});\
return _instanceType;\
}\
-(id)copyWithZone:(NSZone *)zone\
{\
return _instanceType;\
}\
-(oneway void)release\
{\
\
}\
-(instancetype)retain\
{\
return _instanceType;\
}\
-(instancetype)autorelease\
{\
return _instanceType;\
}\
- (NSUInteger)retainCount\
{\
return 1;\
}
#endif
下载链接地址??
http://pan.baidu.com/s/1mhKHg7Y
以上就介绍了单例抽取成宏，包括了宏方面的内容，希望对移动开发有兴趣的朋友有所帮助。
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