如何实现一个带动画的弹窗？

//声明弹窗controller
dialogController: CustomDialogController = new CustomDialogController({
  builder: MyDialog(),
  alignment: DialogAlignment.Bottom,
  offset: { dx: 0, dy: "-20vp" },
  //动画设置参数
  openAnimation: {
    duration: 500,
    curve: Curve.Sharp,
    delay: 100,
    playMode: PlayMode.Reverse,
    onFinish: () => {
      console.info('play end')
    }
  },
})