HarmonyOS应用如何处理设备的旋转、横竖屏切换等问题？

import {  window } from '@kit.ArkUI';
import { BusinessError } from '@kit.BasicServicesKit';        


Button('切换横屏').onClick((event: ClickEvent) => {
          try {
            window.getLastWindow(getContext(), (err: BusinessError, data) => {
              data?.setPreferredOrientation(window.Orientation.LANDSCAPE) //横屏全屏
            })
          } catch (err) {
            console.log('=========a',JSON.stringify(err,null,2))
          }

        })
        Button('切换竖屏').onClick((event: ClickEvent) => {
          try {
            window.getLastWindow(getContext(), (err: BusinessError, data) => {
              data?.setPreferredOrientation(window.Orientation.PORTRAIT) //横屏全屏
            })
          } catch (err) {
            console.log('=========a',JSON.stringify(err,null,2))
          }
        })