unicreators / Mvvm

A Flutter MVVM (Model-View-ViewModel) implementation. It uses property-based data binding to establish a connection between the ViewModel and the View, and drives the View changes through the ViewModel.

一个 Flutter 的 MVVM(Model-View-ViewModel) 实现。 它使用基于属性 (property) 的数据绑定在视图模型 (ViewModel) 与视图 (View) 之间建立关联，并通过视图模型 (ViewModel) 驱动视图 (View) 变化。

Documentation & Example

import 'package:flutter/widgets.dart';
import 'package:mvvm/mvvm.dart';
import 'dart:async';

// ViewModel
class Demo1ViewModel extends ViewModel {
  Demo1ViewModel() {
    propertyValue<String>(#time, initial: "");
    start();
  }

  start() {
    Timer.periodic(const Duration(seconds: 1), (_) {
      var now = DateTime.now();
      setValue<String>(#time, "${now.hour}:${now.minute}:${now.second}");
    });
  }
}

// View
class Demo1View extends View<Demo1ViewModel> {
  Demo1View() : super(Demo1ViewModel());

  @override
  Widget build(BuildContext context) {
    return Container(
        margin: EdgeInsets.symmetric(vertical: 100),
        padding: EdgeInsets.all(40),
        // binding
        child: $.watchFor<String>(#time,
            builder:
                $.builder1((t) => Text(t, textDirection: TextDirection.ltr))));
  }
}

// run
void main() => runApp(Demo1View());

APIs

ViewContext ($.*)

Properties

• model

Methods

• watch
• watchFor
• watchAny
• watchAnyFor
• $cond
• $condFor
• $if
• $ifFor
• $switch
• $switchFor
• adapt
• builder0
• builder1
• builder2

override

• viewInit
• viewReady
• dispose

ViewModel

Methods

• registryProperty
• propertyValue
• propertyAdaptive
• propertyAsync
• getValue
• setValue
• updateValue
• notify

override

• viewInit
• viewReady
• dispose

View

Properties

• $
• $Model

Methods

• setState

override

• init
• ready
• dispose

Documentation

License

MIT