First create a new header file that defines the following macros:
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// .h文件的实现#define SingletonH(methodName) + (instancetype)shared##methodName;// .m文件的实现#if __has_feature(objc_arc) // 是ARC#define SingletonM(methodName) \staticid_instace = nil; \+ (id)allocWithZone:(struct_NSZone *)zone \{ \if(_instace == nil) { \staticdispatch_once_t onceToken; \dispatch_once(&onceToken, ^{ \_instace = [superallocWithZone:zone]; \}); \} \return_instace; \} \\- (id)init \{ \staticdispatch_once_t onceToken; \dispatch_once(&onceToken, ^{ \_instace = [superinit]; \}); \return_instace; \} \\+ (instancetype)shared##methodName \{ \return[[selfalloc] init]; \} \+ (id)copyWithZone:(struct_NSZone *)zone \{ \return_instace; \} \\+ (id)mutableCopyWithZone:(struct_NSZone *)zone \{ \return_instace; \}#else // 不是ARC#define SingletonM(methodName) \staticid_instace = nil; \+ (id)allocWithZone:(struct_NSZone *)zone \{ \if(_instace == nil) { \staticdispatch_once_t onceToken; \dispatch_once(&onceToken, ^{ \_instace = [superallocWithZone:zone]; \}); \} \return_instace; \} \\- (id)init \{ \staticdispatch_once_t onceToken; \dispatch_once(&onceToken, ^{ \_instace = [superinit]; \}); \return_instace; \} \\+ (instancetype)shared##methodName \{ \return[[selfalloc] init]; \} \\- (oneway void)release \{ \\} \\- (id)retain \{ \returnself; \} \\- (NSUInteger)retainCount \{ \return1; \} \+ (id)copyWithZone:(struct_NSZone *)zone \{ \ return_instace; \} \ \+ (id)mutableCopyWithZone:(struct_NSZone *)zone \{ \ return_instace; \}#endif |
And then in your definition of the Singleton class
. h file Write Singletonh (mymethodname)
. m file Write Singletonm (mymethodname)
Get!
Fast realization of OC single case
