AsyncStorage存储key管理小技巧

  saveFavoriteItem(key,vaule,callback) {
    AsyncStorage.setItem(key,vaule,(error,result)=>{
      if (!error) {//更新Favorite的key
        this.updateFavoriteKeys(key,true);
      }
    });
  }

/**
   * 更新Favorite key集合
   * @param isAdd true 添加,false 删除
   * **/
  updateFavoriteKeys(key,isAdd){
    AsyncStorage.getItem(this.favoriteKey,(error,result)=>{
      if (!error) {
        var favoriteKeys=[];
        if (result) {
          favoriteKeys=JSON.parse(result);
        }
        var index=favoriteKeys.indexOf(key);
        if(isAdd){
          if (index===-1)favoriteKeys.push(key);
        }else {
          if (index!==-1)favoriteKeys.splice(index, 1);
        }
        AsyncStorage.setItem(this.favoriteKey,JSON.stringify(favoriteKeys));
      }
    });
  }

getFavoriteKeys(){//获取收藏的Respository对应的key
    return new Promise((resolve,reject)=>{
      AsyncStorage.getItem(this.favoriteKey,(error,result)=>{
        if (!error) {
          try {
            resolve(JSON.parse(result));
          } catch (e) {
            reject(error);
          }
        }else {
          reject(error);
        }
      });
    });
  }

AsyncStorage.multiGet(keys, (err, stores) => {
    try {
      stores.map((result, i, store) => {
        // get at each store's key/value so you can work with it
        let key = store[i][0];
        let value = store[i][1];
        if (value)items.push(JSON.parse(value));
      });
      resolve(items);
    } catch (e) {
      reject(e);
    }
 });