Flutter dynamic | fair 2.5.0 new version features

Fair New version features —2.5.0

Fair 2.5.0 The version is fully adapted Flutter 2.8.x All versions .

Update time ：2022.05.31

Version features

Fair

• adapter Flutter SDK 2.8.0、2.8.1
• Dart2JS Support parsing singleton
• Add grammar sugar Sugar.switchCase、Sugar.colorsWithOpacity、Sugar.convertToString etc.

example

Comprehensive optimization example structure , upgrade example Experience , More suitable for beginners .
In the source code , newly added example engineering , For providing Fair API The standard usage of .

example Project location ：fair/example

contributor

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Instructions for new functions

Dart2JS Support parsing singleton

Previously, the dynamic page quoted the words of singleton , It can't be done JS analysis , After optimization , At present, it can be directly in the dynamic page , Use single example .

Code example ：

Single case ：

class PageSingleton {  factory PageSingleton() =>_getInstance();  static PageSingleton get instance => _getInstance();  static PageSingleton _instance;  PageSingleton._internal();  static PageSingleton _getInstance() {    if (_instance == null) {      _instance = new PageSingleton._internal();    }    return _instance;  }}

Use singletons in dynamic pages ：

import 'package:fair/fair.dart';import './PageSingleton.dart';import './Person.dart';import 'package:flutter/cupertino.dart';import 'package:flutter/material.dart';@FairPatch()class MyHomePage extends StatefulWidget {  MyHomePage({Key key, this.data}) : super(key: key) {  }  dynamic data;  @override  _MyHomePageState createState() => _MyHomePageState();}class _MyHomePageState extends State<MyHomePage> {  @FairProps()  var fairProps;  static int _example;  ///  Use single example   PageSingleton one = PageSingleton.instance;  PageSingleton two = PageSingleton.instance;  Person person = new Person();  int _counter = 0;  var _title;  var _title1 = "PageSingleton instance";  var _title2 = "one == null";  var _title3 = "person.age";  var _title4 = "person.name";  void onLoad() {    _title = fairProps['title'];  }  @override  void initState() {    super.initState();    fairProps = widget.data;    onLoad();  }  void _incrementCounter() {    setState(() {      _counter++;      _title1 = (one == two) ? "one = two is true" : "one = two is false";      _title2 = (one == null) ? "one = null is true" : "one = null is false";      _title3 = "person.age = ${person.getAge}";      _title4 = "person.age = ${person.getName}";      _example = 1;    });  }  @override  Widget build(BuildContext context) {    return Scaffold(      appBar: AppBar(        title: Text(_title),      ),      body: Center(        child: Column(          mainAxisAlignment: MainAxisAlignment.center,          children: <Widget>[            Text(              'You have pushed the button this many times:',            ),            Text('$_title1'),            Text('$_title2'),            Text('$_title3'),            Text('$_title4'),            Text('$_example'),            Text('$_counter',                style: TextStyle(                    fontSize: 40, color: Color(0xffeb4237), wordSpacing: 0)),          ],        ),      ),      floatingActionButton: FloatingActionButton(        onPressed: _incrementCounter,        tooltip: 'Increment',        child: Icon(Icons.add),      ),     );  }}

Add grammar sugar

Sugar.switchCase

Sugar.switchCase(_value, [                  SugarSwitchCaseObj(reValue: Text("2-ValueTitle"), sugarCase: 2),                  SugarSwitchCaseObj(reValue: Text("3-ValueTitle"), sugarCase: 3),                  SugarSwitchCaseObj(reValue: Text("4-ValueTitle"), sugarCase: 4)                ], Text("default-ValueTitle"))

Sugar.colorsWithOpacity()

Set color transparency

Sugar.colorsWithOpacity(Colors.blue, 0.5)

Sugar.convertToString()

Turn into String

Sugar.convertToString(orginalValue: 0.4444)

Short term plan

• adapter Flutter 2.10.x Relevant version
• Expand and optimize grammar sugar
• increase idea lint plug-in unit , Assist in finding and modifying problems in the development process
• Fair Technology Salon , expect 6 At the end of the month, it will be broadcast live on major live broadcasting platforms

Fair laboratory

Hot update platform

The dynamic scheme is inseparable from the hot update platform , We plan to launch in the near future to Flutter and Dart Server The main hot update platform , Implementation Developer 0 Cost access Fair Heat is more powerful .

Online dynamic

We will also try to use low code In the form of , Based on online tools , Conduct online Fair Dynamic editing , Improve the overall development efficiency . <br/> <br/> <br/>

Fair brief introduction

Fair Is for Flutter Dynamic framework of design , adopt Fair Compiler Tools on native Dart Automatic conversion of source files , Make the project dynamically updated Widget Tree and State The ability of .

establish Fair Our goal is to support non distribution （Android、iOS、Web） Under the circumstances , Through business bundle and JS Issue the implementation update , In a way similar to React Native. And Flutter Fair After the integration , You can quickly publish new pages , Without waiting for the next release date of the app .Fair Provided with standard Widget, It can be used as a new dynamic page or as an existing page Flutter Part of the page , Such as operation layout / Style modification , Full page replacement , Partial replacement can be used .

Fair Layered architecture

Fair The structure is made up of 2 Part of it is made up of ,1 For the same Kraken and MXFlutter Of App Running environment ,2 by Fair Compiler hold Dart The source file is compiled to DSL and JS Tools for dynamic products . The structure is as follows ： Fair In the frame Widget structure 、 Data binding and basic logic （if、List Map…） The treatment is all in Dart Domain complete , Leave to JS There are only basic data types on the side 、 Operations and method call processing .

Fast access

1. Add dependency

It is recommended that fair Download to local , adopt path Relative path dependency . hypothesis fair The project is located under the same folder as your own project ：

# add Fair dependencydependencies:  fair: 2.3.0# add compiler dependencydev_dependencies:  build_runner: ^2.0.0  fair_compiler:    path: ../fair/compiler # switch "fair_version" according to the local Flutter SDK versiondependency_overrides:  fair_version: 2.0.6+1

By switching flutter_version Version compatibility . for example , Switch this machine to flutter 2.0.6 after ,Fair Synchronous switching is required

# switch to another stable flutter versiondependency_overrides:  fair_version:    path: ../fair/flutter_version/flutter_2_0_6

2. Use Fair

A common practice is to act as App The root node , If it is not adopted globally, it can also be used as the root node of the sub page

void main() {  WidgetsFlutterBinding.ensureInitialized();  FairApp.runApplication(    _getApp(),    plugins: {    },  );}dynamic _getApp() => FairApp(  modules: {  },  delegate: {  },  child: MaterialApp(    home: FairWidget(            name: 'DynamicWidget',            path: 'assets/bundle/lib_src_page_dynamic_widget.fair.json',            data: {"fairProps": json.encode({})}),  ),);

Each dynamic component consists of a FairWidget Express .

FairWidget(  name: 'DynamicWidget',  path: 'assets/bundle/lib_src_page_dynamic_widget.fair.json',  data: {"fairProps": json.encode({})}),

Fair Information

• Flutter Dynamic framework Fair The document is online & Open source countdown
• Flutter Dynamic framework Fair Design and thinking of
• Fair 2.0 Logic dynamic open source ！
• Fair Design and implementation of logic dynamic architecture
• Fair Logic dynamic communication implementation
• Fair Distribution products - Layout DSL The principle of generation
• Fair Design and implementation of logical syntax sugar
• Fair Hot update design and implementation
• Fair In Anju shooting room App Practice in
• Flutter Dynamic project evaluation
• Fair stay 58 City shooting App Practice in

2022 planning

• Master version plan
  • null-safe Versioning support , expect 4 month 22 Day online
  • Flutter 2.8.0 Version adaptation , expect 5 Online in mid month
  • Flutter 2.10.0 Version adaptation , expect 6 On line at the beginning of the month
  • IDE Syntax detection and prompt plug-in
  • Rich grammar sugar
• Hot update platform
  • Dart Server Project construction
  • Flutter Web Project construction
  • Patch / Resource management
  • project management
  • Mobile Update&Download
• Online dynamic
  • Flutter Web Project construction
  • Dart Server Project construction
  • Action edit
  • Code editing
  • Component editor
  • Page editing
  • Engineering editor
  • Flutter Results the preview
  • Fair DSL preview

Support us

Welcome to use Fair, You are also welcome to light up for us star
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Github Address ：https://fair.58.com
Fair Official website ：https://fair.58.com
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Welcome to contribute

adopt Issue Submit questions , Please submit the contribution code Pull Request, The administrator will review the code .

Yes Fair Interested partners , You can join the exchange group .

WeChat

Wechat into the group ： Please add it first 58 The technical secretary is a good friend , remarks fair, The little secretary is invited to join the group .