使用Greg佩里的优秀库mvc_pattern。链接上提供了快速入门示例代码和说明。
下面是一个经典计数器应用程序的快速入门示例，来自上面的链接：
视图：

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.

  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Demo',
      theme: new ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: new MyHomePage(),
    );
  }
}

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

  // Fields in a Widget subclass are always marked "final".

  static final String title = 'Flutter Demo Home Page';

  @override
  _MyHomePageState createState() => new _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {

  final Controller _con = Controller.con;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              widget.title,
            ),
            Text(
              '${_con.counter}',
              style: Theme.of(context).textTheme.display1,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          setState(
              _con.incrementCounter
          );
        },
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ),
    );
  }
}

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控制器类别：

class Controller extends ControllerMVC {
  /// Singleton Factory
  factory Controller() {
    if (_this == null) _this = Controller._();
    return _this;
  }
  static Controller _this;

  Controller._();

  /// Allow for easy access to 'the Controller' throughout the application.
  static Controller get con => _this;

  int get counter => _counter;
  int _counter = 0;
  void incrementCounter() => _counter++;
}

型
现在对上面的代码进行重构，添加一个模型：

int get counter => Model.counter;
  void incrementCounter() {
    /// The Controller knows how to 'talk to' the Model. It knows the name, but Model does the work.
    Model._incrementCounter();
  }

型
最后是模型类：

class Model {
  static int get counter => _counter;
  static int _counter = 0;
  static int _incrementCounter() => ++_counter;
}

型
但是，请确保将flutter升级到1.13.0版。至少对我来说，我在较低版本中遇到了几个构建错误。

Karee是一套在Flutter中实现MVC设计的工具。它可以帮助您管理您的控制器，您的路线，您的屏幕等。参考karee github wiki获取文档。
可以使用Karee。支持Flutter 2.X.X
要安装运行npm install -g karee然后karee create在基于Karee创建一个新的Flutter项目后，您可以添加新的控制器
样本代码
创建à新控制器

Karee generate --controller --path auth Authentication

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在lib/app/controllers/auth/AuthenticationController下生成的文件

@Controller
class AuthenticationController {

       login(username, password) {

                /// Your custom code

       }
}

型
添加路线

Route.on('/login', 'AuthenticationController@login');

型
在屏幕中使用

var authUser = KareeRouter.goto('/login', parameter:[username, password]);

型

flutter 3.10.6 +版本型号/counter_model.dart

class CounterModel {
  int _count = 0;

  int get count => _count;

  void increment() {
    _count++;
  }

  void decrement() {
    _count--;
  }
}

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controllers/counter_controller.dart

import '../models/counter_model.dart';

class CounterController {
  CounterModel model = CounterModel();

  int get count => model.count;

  void increment() {
    model.increment();
  }

  void decrement() {
    model.decrement();
  }
}

型
views/counter_view.dart

import 'package:flutter/material.dart';
import '../controllers/counter_controller.dart';

class CounterView extends StatefulWidget {
  const CounterView({super.key});

  @override
  State<CounterView> createState() => _CounterViewState();
}

class _CounterViewState extends State<CounterView> {
  final CounterController _controller = CounterController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Counter App')),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            const Text(
              'Count:',
              style: TextStyle(fontSize: 24.0),
            ),
            Text(
              '${_controller.count}',
              style:
                  const TextStyle(fontSize: 48.0, fontWeight: FontWeight.bold),
            ),
            const SizedBox(height: 16.0),
            Row(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                ElevatedButton(
                  onPressed: () {
                    _controller.increment();
                    setState(() {});
                  },
                  child: const Icon(Icons.add),
                ),
                const SizedBox(width: 16.0),
                ElevatedButton(
                  onPressed: () {
                    _controller.decrement();
                    setState(() {});
                  },
                  child: const Icon(Icons.remove),
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }
}

型
在一个改变在主。dart

import 'package:flutter/material.dart';

void main() {
  runApp(const MainApp());
}

class MainApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
          return MaterialApp(
           title: 'Counter App',
           theme: ThemeData(
              useMaterial3: true,
              colorScheme: ColorScheme(
                primary: Colors.orange,
                secondary: Colors.amber,
                background: Colors.white,
                surface: Colors.white,
                brightness: Brightness.light,
                error: Colors.red[900]!,
                onPrimary: Colors.white,
                onSecondary: Colors.white,
                onBackground: Colors.black,
                onSurface: Colors.black,
                onError: Colors.white,
              ),
            ),
           home: CounterView(),
          );
  }
}

型
完整的博客是https://medium.com/@raviyatechnical/flutter-state-management-mvc-pattern-example-for-building-a-counter-app-4a43aa6a1e6