Flutter Mobx -在PageView中的页面之间传递存储状态

dependencies:
  flutter_mobx: ^x.x.x

import 'package:mobx/mobx.dart';

part 'my_store.g.dart';

class MyStore = _MyStore with _$MyStore;

abstract class _MyStore with Store {
  @observable
  int counter = 0;

  @action
  void increment() {
    counter++;
  }
}

import 'package:flutter_mobx/flutter_mobx.dart';
import 'package:provider/provider.dart';

class MyPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final myStore = Provider.of<MyStore>(context);

    return Scaffold(
      appBar: AppBar(
        title: Text('My Page'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'Counter: ${myStore.counter}',
              style: TextStyle(fontSize: 24),
            ),
            RaisedButton(
              child: Text('Increment'),
              onPressed: myStore.increment,
            ),
          ],
        ),
      ),
    );
  }
}

import 'package:flutter_mobx/flutter_mobx.dart';
import 'package:provider/provider.dart';

class ParentPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final myStore = Provider.of<MyStore>(context);

    return Scaffold(
      appBar: AppBar(
        title: Text('Parent Page'),
      ),
      body: Observer(
        builder: (_) => PageView(
          children: <Widget>[
            MyPage(),
            AnotherPage(),
          ],
        ),
      ),
    );
  }
}