RNApp/common/DeviceStorage.js

import React, {
    AsyncStorage
} from 'react-native'

class DeviceStorage {
  /**
   * 获取
   * @param key
   * @returns {Promise<T>|*|Promise.<TResult>}
   */

  static get (key) {
    return AsyncStorage.getItem(key).then((value) => {
      const jsonValue = JSON.parse(value)
      return jsonValue
    })
  }

  /**
   * 保存
   * @param key
   * @param value
   * @returns {*}
   */
  static save (key, value) {
    return AsyncStorage.setItem(key, JSON.stringify(value))
  }

  /**
   * 更新
   * @param key
   * @param value
   * @returns {Promise<T>|Promise.<TResult>}
   */
  static update (key, value) {
    return DeviceStorage.get(key).then((item) => {
      value = typeof value === 'string' ? value : Object.assign({}, item, value)
      return AsyncStorage.setItem(key, JSON.stringify(value))
    })
  }

  /**
   * 更新
   * @param key
   * @returns {*}
   */
  static delete (key) {
    return AsyncStorage.removeItem(key)
  }
}

export default DeviceStorage