main.dart

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

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
        pageTransitionsTheme: const PageTransitionsTheme(builders: {
          TargetPlatform.android: CupertinoPageTransitionsBuilder(),
          TargetPlatform.windows: CupertinoPageTransitionsBuilder(),
          TargetPlatform.fuchsia: CupertinoPageTransitionsBuilder(),
          TargetPlatform.macOS: CupertinoPageTransitionsBuilder(),
          TargetPlatform.iOS: CupertinoPageTransitionsBuilder(),
        }),
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  Widget build(BuildContext context) {
    return Scaffold(
      body: Column(mainAxisSize: MainAxisSize.min, children: [
        OutlinedButton.icon(
          onPressed: () async {
            Navigator.of(context)
                .push(MaterialPageRoute(builder: (_) => SecondPage()));
          },
          icon: const Icon(
            Icons.add_rounded,
            size: 32.0,
          ),
          label: const Text(
            'SECOND PAGE CUPERTINO',
          ),
        ),
      ]),
    );
  }
}

class SecondPage extends StatelessWidget {
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        color: Colors.red,
        child: OutlinedButton.icon(
          onPressed: () async {
            Navigator.of(context).pop();
          },
          icon: const Icon(
            Icons.add_rounded,
            size: 32.0,
          ),
          label: const Text(
            'Back',
          ),
        ),
      ),
    );
  }
}