flutter 左右晃动摆动动画例子

siman · 2024-6-5 18:22:17

左右摆动带角度摆动时带有角度倾斜

import 'dart:math';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
// This is the theme of your application.
//
// TRY THIS: Try running your application with "flutter run". You'll see
// the application has a blue toolbar. Then, without quitting the app,
// try changing the seedColor in the colorScheme below to Colors.green
// and then invoke "hot reload" (save your changes or press the "hot
// reload" button in a Flutter-supported IDE, or press "r" if you used
// the command line to start the app).
//
// Notice that the counter didn't reset back to zero; the application
// state is not lost during the reload. To reset the state, use hot
// restart instead.
//
// This works for code too, not just values: Most code changes can be
// tested with just a hot reload.
colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
useMaterial3: true,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key, required this.title});
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> with TickerProviderStateMixin {
late final AnimationController _shakeController =
AnimationController(vsync: this, duration: shakeDuration);
shake() {
_shakeController.forward();
}
@override
void initState() {
_shakeController.addListener(() {
if (_shakeController.status == AnimationStatus.completed) {
_shakeController.reset();
}
});
super.initState();
}
var shakeCount = 2;
var shakeDuration = Duration(milliseconds: 1000);
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text("晃动"),
),
body: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
mainAxisAlignment: MainAxisAlignment.center,
children: [
AnimatedBuilder(
animation: _shakeController,
builder: (context, child) {
final sineValue = sin(shakeCount * 2 * pi * _shakeController.value);
print(sineValue);
return Transform.translate(
offset: Offset(sineValue * 10, 0),
child: Transform.rotate(angle: sineValue *10* (pi / 180),
child: child),
);
},
child: const Text(
"我是摆动文字",
textAlign: TextAlign.center,
style: TextStyle(color: Colors.orange),
),
),
CupertinoButton(child: const Text("抖动"), onPressed: shake),
],
),
);
}
}

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flutter 左右晃动摆动动画例子

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