源码https://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-dart:dart3新特性（类相关）示例如下:lib\dart\dart3feature2.dart/**dart3新特性（类相关）***升级dart需要先在pubspec.yaml中做如下配置，然后flutterupgrade*environment:

源码https://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-游戏:俄罗斯方块示例如下:lib\game\tetris\tetris.dart/**俄罗斯方块**使用了flame库，在pubspec.yaml中做如下配置，然后flutterpubget*dependencies:*flame:^1.7.3*

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-widget基础:生命周期示例如下:lib\widget\basic\lifecycle.dart/**生命周期*/import'package:flutter/material.dart';import'../../helper.dart';classLifecy

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-UI:其它示例如下:lib\ui\other.dart/**其它*/import'dart:io';import'package:flutter/foundation.dart';import'package:flutter/material.dart'

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-UI:MediaQuery-获取屏幕的相关信息，使系统设置中的字体大小无效示例如下:lib\ui\media_query.dart/**MediaQuery-获取屏幕的相关信息，使系统设置中的字体大小无效*/imp

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-输入:软键盘相关示例如下:lib\input\soft_keyboard.dart/**软键盘相关*/import'package:flutter/material.dart';import'../helper.dart';classSoftKeyboardDemo

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-widget滚动类:ScrollNotification-滚动通知示例如下:lib\widget\scroll\scroll_notification.dart/**ScrollNotification-滚动通知*/import'package:flutter/mater

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-widget状态管理:状态管理-在树上，父监听子的通知示例如下:lib\state\notification_listener.dart/**状态管理-在树上，父监听子的通知**在树上，子通过Notification触

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-widget容器类（只能有一个子）:LimitedBox-限制最大尺寸示例如下:lib\w

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-widget容器类（只能有一个子）:OverflowBox-可溢出示例如下:lib\widget

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-图形:绘制示例如下:lib\shape\paint.dart/**绘制**CustomPai

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-UI:主题基础示例如下:lib\ui\theme.dart/**主题基础*/import

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-UI:屏幕方向示例如下:lib\ui\orientation.dart/**屏幕方向*所

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-UI:安全区域示例如下:lib\ui\safe_area.dart/**SafeArea-安全区

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-输入:GestureDetector-手势示例如下:lib\input\gesture_detector.da

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-输入:RawKeyboardListener-按键示例如下:lib\input\raw_keyboard_li

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-widgetBuilder:StatefulBuilder-有状态的Builder示例如下:lib\wid

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-widget弹出类:MaterialBanner-顶部弹出条示例如下:lib\widget\flyo

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-widget选择类:Radio-单选框示例如下:lib\widget\selection\radio.d

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-widget媒体类:Icon-图标示例如下:lib\widget\media\icon.dart/*

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-widget文本类:字体示例如下:lib\widget\text\font.dart/**本例用

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-dart:库的开发和使用示例如下:lib\dart\package\demo.dart/**dart

一统天下flutterhttps://github.com/webabcd/flutter_demo作者webabcd一统天下flutter-dart:概述示例如下:lib\dart\summary.dart/**dart概述**注：