HarmonyOSBaseLibs/src/main/ets/utils/AppStorageHelper.ets

/**
 * 永久化存储，存储在本地文件
 */
export class AppStorageHelper {
  /**
   * 缓存string
   * @param key
   * @param value
   */
  public static save(key: string, value: string|undefined) {
    PersistentStorage.persistProp(key, value)
  }

  /**
   * 获取已缓存的string
   * @param key
   * @returns
   */
  public static get(key: string):string|undefined {
    return AppStorage.get<string>(key)
  }
}