HarmonyOS 添加事件到手机日历日程

参考日历添加日程接口，添加日程指定提醒时间，到点后会有系统提醒弹框

https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-calendarmanager-V5#addevent

import { BusinessError } from '@ohos.base';
import { calendarMgr } from '../entryability/EntryAbility';

let calendar : calendarManager.Calendar | undefined = undefined;
const date = new Date();
const event: calendarManager.Event = {
  type: calendarManager.EventType.NORMAL,
  startTime: date.getTime(),
  endTime: date.getTime() + 60 * 60 * 1000
};
calendarMgr?.getCalendar((err: BusinessError, data:calendarManager.Calendar) => {
  if (err) {
    console.error(`Failed to get calendar, err -> ${JSON.stringify(err)}`);
  } else {
    console.info(`Succeeded to get calendar, data -> ${JSON.stringify(data)}`);
    calendar = data;
    calendar.addEvent(event).then((data: number) => {
      console.info(`Succeeded to add event, id -> ${data}`);
    }).catch((err: BusinessError) => {
      console.error(`Failed to addEvent, err -> ${JSON.stringify(err)}`);
    });
  }
});

设置Event对象里面的reminderTime

reminderTime number[] 否 否 日程提醒时间，单位为分钟。填写x分钟，即距开始时间提前x分钟提醒，不填时，默认为不提醒。可为负值。