HarmonyOS鸿蒙Next通知请求的参数注意事项

HarmonyOS鸿蒙Next通知请求的参数注意事项 在复现下载文件codelabs的时候发现了一个容易忽视的问题：

定义通知请求的代码如下所示：

let notificationRequest: notificationManager.NotificationRequest = {
  id: CommonConstants.NOTIFICATION_ID,
  notificationSlotType: notificationManager.SlotType.CONTENT_INFORMATION,
  // Construct a progress bar template. The name field must be set to downloadTemplate.
  template: template,
  content: {
    notificationContentType: notificationManager.ContentType.NOTIFICATION_CONTENT_BASIC_TEXT,
    normal: {
      title: `${title}：${CommonConstants.DOWNLOAD_FILE}`,
      text: ' ',
      additionalText: `${progress}%`
    }
  },
  wantAgent: wantAgentObj
};

我在复现的时候写的代码如下：

let notificationRequest:notificationManager.NotificationRequest = {
  id:NOTIFICATION_ID,
  notificationSlotType:notificationManager.SlotType.CONTENT_INFORMATION,
  template:template,
  content:{
    notificationContentType:notificationManager.ContentType.NOTIFICATION_CONTENT_BASIC_TEXT,
    normal:{
      title:`${title}：${DOWNLOAD_FILE}`,
      text:'',
      additionalText:`${progress}%`
    }
  },
  wantAgent:wantAgentObj
}

结果一点下载APP就崩掉。最后逐句代码替换，发现text属性不能为空，如果不显示东西也要设置成“ ”空格。