Flutter Cupertino Package for iOS devs

FlutterCupertino.dart

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

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

class MyApp extends StatelessWidget {
  const MyApp();

  @override
  Widget build(BuildContext context) {
    return CupertinoApp(
      home: HomeScreen(),
    );
  }
}

class HomeScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return CupertinoTabScaffold(
      tabBar: CupertinoTabBar(
        items: [
          BottomNavigationBarItem(
            icon: Icon(CupertinoIcons.book_solid),
            title: Text('Book'),
          ),
          BottomNavigationBarItem(
            icon: Icon(CupertinoIcons.eye_solid),
            title: Text('Eye'),
          ),
        ],
      ),
      tabBuilder: (context, i) {
        return CupertinoTabView(
          builder: (context) {
            return CupertinoPageScaffold(
              navigationBar: CupertinoNavigationBar(
                middle: (i == 0) ? Text('Book') : Text('Eye'),
              ),
              child: Center(
                child: CupertinoButton(
                  child: Text(
                    'This is  tab #$i',
                    style: CupertinoTheme.of(context)
                        .textTheme
                        .navLargeTitleTextStyle
                        .copyWith(fontSize: 32),
                  ),
                  onPressed: () {
                    Navigator.of(context).push(
                      CupertinoPageRoute(builder: (context) {
                        return DetailScreen();
                      }),
                    );
                  },
                ),
              ),
            );
          },
        );
      },
    );
  }
}

class DetailScreen extends StatefulWidget {
  const DetailScreen();

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

class _DetailScreenState extends State<DetailScreen> {
  @override
  Widget build(BuildContext context) {
    return CupertinoPageScaffold(
      navigationBar: CupertinoNavigationBar(
        middle: Text('Details'),
      ),
      child: Padding(
        padding: const EdgeInsets.all(32.0),
        child: Center(
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              CupertinoButton(
                child: Text('Launch action sheet'),
                onPressed: () {
                  showCupertinoModalPopup<int>(
                    context: context,
                    builder: (context) {
                      return CupertinoActionSheet(
                        title: Text('some choices'),
                        actions: [
                          CupertinoActionSheetAction(
                            child: Text('One!'),
                            onPressed: () {
                              Navigator.pop(context, 1);
                            },
                          ),
                          CupertinoActionSheetAction(
                            child: Text('Two!'),
                            onPressed: () {
                              Navigator.pop(context, 2);
                            },
                          ),
                          CupertinoActionSheetAction(
                            child: Text('Three!'),
                            onPressed: () {
                              Navigator.pop(context, 3);
                            },
                          ),
                        ],
                      );
                    },
                  );
                },
              )
            ],
          ),
        ),
      ),
    );
  }
}