flutter showModalBottomSheet max height

  static void showBuyServiceDialog(BuildContext context) {
    showModalBottomSheet(
      context: context,
      isScrollControlled: false,
      builder: (ctx) {
        return BuySeviceDialog();
      },
    );
  }

当从底部弹窗BuySeviceDialog这个视图的时候，默认最大高度为当前屏幕的一半，只有开启isScrollControlled=true,才可以设置任意高度

https://stackoverflow.com/a/53318679