YYCache - 小数据缓存

https://github.com/ibireme/YYCache

小数据存储:
1、plist(NSUserDefaults):主要是系统设置
2、cache 缓存(磁盘保存,以及内存缓存)

YYCache

sqlite3.0

1 存:存入内存的同时写入磁盘
2 读:1)先从内存读,有就直接拿来用;2)没有再从磁盘读,有就拿来用,顺便存到内存;3)还没有就返回空。

-1 总缓存(包括磁盘和内存)

// 建个小数据表
    YYCache *cache = [YYCache cacheWithName:@"userInfo"];

// 存
    [cache setObject:@"张三" forKey:@"name"];

// 检查 读取(直接读取,不存在则是 nil)
    if ([cache containsObjectForKey:@"name"]) {
        NSString *name = (NSString *)[cache objectForKey:@"name"];
        NSLog(@"%@",[name class]);
    }

// 删
    [cache removeObjectForKey:@"name"];
    [cache removeAllObjects];

  • 2 只要内存 或者 只要磁盘存储
    YYCache *cache = [YYCache cacheWithName:@"userInfo"];
    YYDiskCache *diskCache = cache.diskCache;
    YYMemoryCache *memoryCache = cache.memoryCache;

// diskCache memoryCache 与cache 存取方法一致!!

实际使用

一般用作 UserManager 单例,保存用户数据等。举个简单栗子

  • 1 .h
@interface UserManager : NSObject

+ (instancetype)manager;

@property (nonatomic, copy, readonly) NSString *name;
@property (nonatomic, copy, readonly) NSString *gender;
@property (nonatomic, assign, readonly) NSInteger age;
@property (nonatomic, strong) UserModel *userModel;

- (void)updateUserInfo:(id)userInfo;

@end
  • 2 .m
+ (instancetype)manager {
    static UserManager *instance = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        instance = [[UserManager alloc] init];
    });
    return instance;
}

- (instancetype)init {
    self = [super init];
    if (self) {
        self.userCache = [[YYCache alloc] initWithName:@"jyw.userInfo"];
    }
    return self;
}

- (void)updateUserInfo:(id)userInfo {
    [self.userCache setObject:userInfo forKey:@"info"];
}

- (NSDictionary *)userInfo {
    if (!_userInfo) {
        id value = [self.userCache objectForKey:@"info"];
        NSDictionary *userInfo = (NSDictionary *)value;
        return userInfo;
    }
    return _userInfo;
}

- (UserModel *)userModel {
    if (!_userModel) {
        if (self.userInfo) {
            UserModel *employeeModel = [UserModel mj_objectWithKeyValues:self.userInfo];
            return employeeModel;
        }
    }
    return _userModel;
}

- (NSString *)name {
    return self.userModel.name;
}

- (NSString *)gender {
    return self.userModel.gender;
}

- (NSInteger)age {
    return self.userModel.age;
}
  • 3 使用
    NSDictionary *userInfo = @{@"name":@"张三",
                               @"gender":@"男",
                               @"age":@"18"};
    
    [[UserManager manager] updateUserInfo:userInfo];
    
    NSLog(@"%@",[UserManager manager].name);
    NSLog(@"%@",[UserManager manager].gender);
    NSLog(@"%zi",[UserManager manager].age);

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