HarmonyOS preferences的on方法未正确触发？

Question

测试代码：

async aboutToAppear() {
  LogUtils.debug(`preferencesTest 111`)
  let preferences = await PreferencesUtils.getPreferences(PreferencesConstants.USER_PREFERENCES)
  LogUtils.debug(`preferencesTest 222`)
  let dataObserver = function (key) {
    LogUtils.debug(`preferencesTest dataObserver key = ${key}`)
  }
  preferences.on('change', dataObserver)

  await PreferencesUtils.put('test', 'hahaha')

  let temp = await PreferencesUtils.get('test')
  LogUtils.debug(`preferencesTest temp = ${temp}`)
}

输出结果：

09-18 15:05:54.367 24101-20226/? D 01111/AscendLogger: preferencesTest 111
09-18 15:05:54.407 24101-20226/? D 01111/AscendLogger: preferencesTest 222
09-18 15:05:54.410 24101-20226/? D 01111/AscendLogger: preferencesTest temp = hahaha

Answer 1

验证下监听与写入操作的是否同一个PreferencesName。