这是一个Flutter库，模拟弹簧动力学，并添加现实世界的物理到您的应用程序。受到Facebook
Rebound启发
使用
要使用此插件包,请将flutter_rebound作为依赖项添加到您的pubspec.yaml文件中,详见dependency in your pubspec.yaml file.
示例
// 引入包
import 'package:rk4/rk4.dart';
import 'package:flutter/material.dart';
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> with TickerProviderStateMixin {
SpringSystem system;
Spring spring;
double _scale = 1;
@override
void initState() {
super.initState();
system = SpringSystem(vsync: this);
spring = system.createSpring(40, 3);
spring.addUpdateListener((spring) {
double value = spring.currentValue;
_scale = 1 - value * 0.5;
setState(() {});
});
spring.endValue = 1;
}
@override
void dispose() {
system.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Transform.scale(
scale: _scale,
child: Container(
width: 200,
height: 200,
color: Colors.red,
),
),
),
);
}
}
