main.dart

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(CupertinoApp(home: DishPage()));
}

class DishPage extends StatefulWidget {
  const DishPage({Key key}) : super(key: key);

  @override
  _DishPageState createState() => _DishPageState();
}

class _DishPageState extends State<DishPage> {
  @override
  Widget build(BuildContext context) {
    return CupertinoPageScaffold(
      child: Container(
        color: CupertinoColors.black,
        child: GestureDetector(
          onTap: () => showCupertinoModalPopup(
              context: context,
              builder: (context) => Container(
                    height: 200,
                    width: 200,
                    color: CupertinoColors.white,
                  )),
        ),
      ),
    );
  }
}