main.dart

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

void main() {
  runApp(new MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      home: new UserOptions(),
    );
  }
}

class UserOptions extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return new UserOptionsState();
  }
}

class UserOptionsState extends State<UserOptions> {
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text('data'),
      ),
      body: new Builder(
        builder: (BuildContext context) {
          return Center(
            child: ListView(
              children: <Widget> [
                RaisedButton(
                  child: Text('Open CupertinoActionSheet'),
                  onPressed: () {
                    containerForSheet<String>(
                      context: context,
                      child: CupertinoActionSheet(
                          title: const Text('Choose frankly 😊'),
                          message: const Text(
                              'Your options are '),
                          actions: <Widget>[
                            CupertinoActionSheetAction(
                              child: const Text('🙋 Yes'),
                              onPressed: () {
                                Navigator.pop(context, '🙋 Yes');
                              },
                            ),
                            CupertinoActionSheetAction(
                              child: const Text('🙋 No'),
                              onPressed: () {
                                Navigator.pop(context, '🙋 No');
                              },
                            ),
                            CupertinoActionSheetAction(
                              child: const Text("🙋 Can't say"),
                              onPressed: () {
                                Navigator.pop(context, "🙋 Can't say");
                              },
                            ),
                            CupertinoActionSheetAction(
                              child: const Text("🙋 Decide in next post"),
                              onPressed: () {
                                Navigator.pop(context, "🙋 Decide in next post");
                              },
                            ),
                          ],
                          cancelButton: CupertinoActionSheetAction(
                            child: const Text('Cancel'),
                            isDefaultAction: true,
                            onPressed: () {
                              Navigator.pop(context, 'Cancel');
                            },
                          )),
                    );
                  }
                ),
                SizedBox(
                  height: 20,
                  ),
                   new CupertinoAlertDialog( 
                        title: new Text("Dialog Title"),
                        content: new Text("This is my content"),
                        actions: <Widget>[
                          CupertinoDialogAction(
                            isDefaultAction: true,
                            child: Text("Yes"),
                          ),
                          CupertinoDialogAction(
                            child: Text("No"),
                          )
                
                ],
              ),
              ]
            ),
          );
          }
        ),
      );
  }

  void containerForSheet<T>({BuildContext context, Widget child}) {
    showCupertinoModalPopup<T>(
      context: context,
      builder: (BuildContext context) => child,
    ).then<void>((T value) {
      Scaffold.of(context).showSnackBar(new SnackBar(
        content: new Text('You clicked $value'),
        duration: Duration(milliseconds: 800),
      ));
    });
  }
}