写作网站都有哪些ppp学校网站系统管理

demo 地址: https://github.com/iotjin/jh_flutter_demo
代码不定时更新，请前往github查看最新代码

波浪动画三方库wave

lottie动画
Lottie 是 Airbnb 开发的一款能够为原生应用添加动画效果的开源工具。具有丰富的动画效果和交互功能。

  # 波浪动画 https://pub-web.flutter-io.cn/packages/wavewave: ^0.2.2# lottie动画 https://pub-web.flutter-io.cn/packages/lottielottie: ^2.4.0

效果图

波浪动画示例

class WavePage extends StatelessWidget {const WavePage({Key? key}) : super(key: key);@overrideWidget build(BuildContext context) {return Scaffold(appBar: const BaseAppBar('波浪动画'),body: _body(),);}_body() {const backgroundColor = Color(0xFFF15BB5);const colors = [Color(0xFFFEE440), Color(0xFF00BBF9)];const durations = [3000, 6000];const heightPercentages = [0.65, 0.66];var waveView = WaveWidget(config: CustomConfig(colors: colors,durations: durations,heightPercentages: heightPercentages,),backgroundColor: backgroundColor,size: const Size(double.infinity, double.infinity),waveAmplitude: 0,);return waveView;}
}

lottie动画示例

需要先准备好加载动画文件：将预先准备好的Lottie动画文件(.json格式)放入flutter项目的资源目录中。可以从Lottie官网下载或创建自定义动画文件。
然后使用 Lottie.asset('assets/xxx.json')加载Widget

import 'package:flutter/material.dart';
import 'package:lottie/lottie.dart';
import '/project/configs/project_config.dart';class LottiePage extends StatefulWidget {const LottiePage({Key? key}) : super(key: key);@overrideState<LottiePage> createState() => _LottiePageState();
}class _LottiePageState extends State<LottiePage> with TickerProviderStateMixin {late AnimationController _animationController1;late AnimationController _animationController2;@overridevoid initState() {// TODO: implement initStatesuper.initState();_init();}_init() {_animationController1 = AnimationController(vsync: this, duration: const Duration(seconds: 1));_animationController2 = AnimationController(vsync: this, duration: const Duration(seconds: 1));}_startAnimation1() {_animationController1..reset()..forward();}_startAnimation2() {_animationController2..reset()..forward();}@overrideWidget build(BuildContext context) {return Scaffold(appBar: const BaseAppBar('Lottie 动画'),body: _body(),);}_body() {return ListView(children: [// Load a Lottie file from your assetsRow(mainAxisAlignment: MainAxisAlignment.center,children: [Lottie.asset('assets/lottie/首页.json', width: 50, height: 50),Lottie.asset('assets/lottie/星球.json', width: 65, height: 65),],),Row(mainAxisAlignment: MainAxisAlignment.center,children: [GestureDetector(onTap: () => _startAnimation1(),child: Lottie.asset('assets/lottie/首页.json',width: 50,height: 50,controller: _animationController1,onLoaded: (composition) => _startAnimation1(),),),GestureDetector(onTap: () => _startAnimation2(),child: Lottie.asset('assets/lottie/星球.json',width: 65,height: 65,controller: _animationController2,onLoaded: (composition) => _startAnimation2(),),),],),Lottie.asset('assets/lottie/Aniki Hamster.json', height: 200),// Load a Lottie file from a remote urlLottie.network('https://assets5.lottiefiles.com/packages/lf20_0LNPii4uOv.json'),],);}
}