[移动开发]flutter底部弹窗设置指定高度的方法

  showSheet() {
    showModalBottomSheet(
        context: context,
        isScrollControlled: true,
        builder: (BuildContext context) {
          return FractionallySizedBox(
              heightFactor: 0.92,
              child: Scaffold(
                  appBar: AppBar(
                    actions: [
                    ],
                    leading: IconButton(
                        onPressed: () {
                          Navigator.pop(context);
                        },
                        icon: Icon(Icons.close),
                        iconSize: ScreenAdapter.size(30),
                        color: Colors.white),
                    title: Text(""),
                    centerTitle: true,
                    backgroundColor: Colors.black38,
                  ),
                  body: Container(
                  ),
                  bottomSheet: Container(
                      
              )));
        });
  }