数据存储封装—支持内存和本地缓存

   公司这几天底层进行重构，本地需要缓存一些数据，对比目前一些比较火的三方，最终决定选用Objective-LevelDB。Objective-LevelDB，是一个基于Google's LevelDB的Objective-C数据库。然后对其进行了简单封装，支持内存和本地缓存，废话少说，直接用法。

支持pod, pod ‘Objective-LevelDB’
源码git地址https://github.com/matehat/Objective-LevelDB

下面是.h封装

#import <Foundation/Foundation.h>/** *  存储服务  基于Objective-LevelDB */@interface FlyStorageManage : NSObject/*   *  存储对象到内存 * *  @parm object 对象 *  @parm akey   key */+ (void)setObjectToMemory:(id)object forKey:(NSString *)akey;/** *  内存中读取某个对象 * *  @parm akey key *   *  @return */+ (id)objectFromMemoryForkey:(NSString *)akey;/** *  从内存中移除某个对象 * *  @parm akey key */+ (void)removeObjectFromMemoryForKey:(NSString *)akey;/** *  存储对象到本地缓存 *   *  @parm object 对象 对象需要实现NSCoding序列化 *  也可配合MJExtension／JsonModel转换成字典存储　 *  @parm akey   key */+ (void)setObjectToLocalCache:(id)object forKey:(NSString *)akey;/** *  从本地缓存中读取某个对象 *   *  @parm akey key *   *  @return */+ (id)objectFromLocalCacheForkey:(NSString *)akey;/** *  从本地缓存中移除某个对象 *    *  @parm akey key */+ (void)removeObjectFromLocalCacheForKey:(NSString *)akey;@end

然后是.m的实现

#import "FlyStorageManage.h"#import "Objective-LevelDB/Classes/LevelDB.h"@interface FlyStorageManage ()@property (nonatomic, strong) NSMutableDictionary *memoryServiceDict;@property (nonatomic, strong) LevelDB             *levelDB;@endstatic NSString *const kLevelDBName                = @"level.db";@implementation FlyStorageManage+ (FlyStorageManage *)shareInstance{    static dispatch_once_t onceToken;    static FlyStorageManage *service = nil;    dispatch_once(&onceToken, ^{        service = [[FlyStorageManage alloc] init];    });    return service;}- (instancetype)init{    if (self = [super init]) {        self.memoryServiceDict = [[NSMutableDictionary alloc] init];        self.levelDB           = [LevelDB databaseInLibraryWithName:kLevelDBName];        self.levelDB.encoder   = ^NSData * (LevelDBKey * key, id object) {            __block id result = nil;            result = [NSKeyedArchiver archivedDataWithRootObject:object];            return result;        };        self.levelDB.decoder   = ^id (LevelDBKey * key, id data) {            __block id result = nil;            result = [NSKeyedUnarchiver unarchiveObjectWithData:data];            return result;        };    }    return self;}#pragma mark --- MemoryService+ (void)setObjectToMemory:(id)object forKey:(NSString *)akey{    // 线程安全    @synchronized (self) {        if (object && akey) {            [[self shareInstance].memoryServiceDict setObject:object forKey:akey];        }    }}+ (id)objectFromMemoryForkey:(NSString *)akey{    @synchronized (self) {        return [[self shareInstance].memoryServiceDict objectForKey:akey];    }}+ (void)removeObjectFromMemoryForKey:(NSString *)akey{    @synchronized (self) {        [[self shareInstance].memoryServiceDict removeObjectForKey:akey];    }}#pragma mark --- LocalCacheService+ (void)setObjectToLocalCache:(id)object forKey:(NSString *)akey{    [[FlyStorageManage shareInstance].levelDB setObject:object forKey:akey];}+ (id)objectFromLocalCacheForkey:(NSString *)akey{    return [[FlyStorageManage shareInstance].levelDB objectForKey:akey];}+ (void)removeObjectFromLocalCacheForKey:(NSString *)akey{    [[FlyStorageManage shareInstance].levelDB removeObjectForKey:akey];}@end

下面是调用部分 (嫌序列化太麻烦，所以调用了MJ大大的MJExtension转换成字典进行存储)

- (void)viewDidLoad {    [super viewDidLoad];    Person *person = [[Person alloc] init];    person.name    = @"测试下";    person.age     = @"18";    person.height  = 14;    person.textArr = [NSMutableArray arrayWithObjects:@"1",@"2",@"3",@"4",@"5",nil];    NSString *personKey   =  @"testKey";    NSDictionary *perDic = person.mj_keyValues;    [FlyStorageManage setObjectToLocalCache:perDic forKey:personKey];    NSDictionary *dic = [CBStorageService objectFromLocalCacheForKey:personKey];}

是不是很方便简单，有需要的朋友可以直接拿去用了