使用宏封装单例
2019-05-28 本文已影响0人
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一、单例使用
- 使用方法 .h
#import <Foundation/Foundation.h>
@interface MineAuthentication :NSObject
SHSingleInstance_H_(AuthenticationManager )
@end
2.使用方法.m
#import "SHMineAuthentication.h"
@interface MineAuthentication ()
@end
@implementation MineAuthentication
SHSingleInstance_M_(AuthenticationManager )
@end
二、单例实现和定义
//1.单例实现和定义宏--方便.h文件使用
#define SHSingleInstance_H_(name) \
+ (instancetype)shared##name;
//2.单例实现和定义宏--方便.m文件使用
#define SHSingleInstance_M_(name) \
static id _instance = nil; \
+ (instancetype)shared##name \
{ \
static dispatch_once_t onceToken; \
dispatch_once(&onceToken, ^{ \
if (_instance == nil) \
{ \
_instance = [[self alloc] init]; \
} \
}); \
return _instance; \
} \
\
+ (instancetype)allocWithZone:(struct _NSZone *)zone \
{ \
static dispatch_once_t onceToken; \
dispatch_once(&onceToken, ^{ \
if (_instance == nil) \
{ \
_instance = [super allocWithZone:zone]; \
} \
}); \
return _instance; \
} \
\
+ (id)copyWithZone:(struct _NSZone *)zone \
{ \
return _instance; \
} \
+ (id)mutableCopyWithZone:(struct _NSZone *)zone \
{ \
return _instance; \
}
三、单例调用
[MineAuthenticationsharedAuthenticationManager];
摘录自原文：https://blog.csdn.net/shihuboke/article/details/78235099
