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Created
November 8, 2023 01:32
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import 'package:flutter/material.dart'; | |
void main() => runApp(const MyApp()); | |
class MyApp extends StatelessWidget { | |
const MyApp({Key? key}) : super(key: key); | |
@override | |
Widget build(BuildContext context) { | |
return MaterialApp( | |
title: 'Flutter Demo', | |
home: const AnimationExample(), | |
); | |
} | |
} | |
class AnimationExample extends StatefulWidget { | |
const AnimationExample({Key? key}) : super(key: key); | |
@override | |
_AnimationExampleState createState() => _AnimationExampleState(); | |
} | |
class _AnimationExampleState extends State<AnimationExample> with SingleTickerProviderStateMixin { | |
late final AnimationController _controller; | |
late final Animation<double> _animation; | |
@override | |
void initState() { | |
super.initState(); | |
_controller = AnimationController( | |
duration: const Duration(seconds: 2), | |
vsync: this, | |
); | |
// Tween을 사용하여 시작과 끝 크기를 정의합니다. 여기서는 100에서 200으로 변합니다. | |
final sizeTween = Tween<double>(begin: 100.0, end: 200.0); | |
// CurvedAnimation을 사용하여 속도 곡선을 정의합니다. | |
final curve = CurvedAnimation( | |
parent: _controller, | |
curve: Curves.easeInCubic, | |
); | |
// Tween과 CurvedAnimation을 결합합니다. | |
_animation = sizeTween.animate(curve); | |
// 리니어한 애니메이션을 위해 Tween만 사용합니다. | |
// _animation = sizeTween.animate(_controller); | |
// 애니메이션 시작 | |
_controller.forward(); | |
} | |
@override | |
void dispose() { | |
_controller.dispose(); | |
super.dispose(); | |
} | |
@override | |
Widget build(BuildContext context) { | |
return Scaffold( | |
appBar: AppBar( | |
title: const Text('Tween + CurvedAnimation'), | |
), | |
body: Center( | |
child: AnimatedBuilder( | |
animation: _animation, | |
builder: (context, child) { | |
// _animation.value는 sizeTween에서 정의한 범위 내에서 변합니다. | |
return Container( | |
width: _animation.value, | |
height: _animation.value, | |
color: Colors.blue, | |
alignment: Alignment.center, | |
child: const Text('Animating...'), | |
); | |
}, | |
), | |
), | |
); | |
} | |
} |
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