■ AnimatedContainer 클래스를 사용하는 방법을 보여준다.
▶ main.dart
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import 'dart:math'; import 'package:flutter/material.dart'; void main() { runApp(TestApplication()); } class TestApplication extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: 'Test Application', theme: ThemeData( primarySwatch: Colors.blue, ), home: MainPage(), ); } } class MainPage extends StatefulWidget { @override _MainPageState createState() => _MainPageState(); } class _MainPageState extends State<MainPage> { double _size = 100.0; @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text('Test Application'), ), body: Center( child: Column( mainAxisAlignment: MainAxisAlignment.center, children: <Widget>[ GestureDetector( onTap: () { final random = Random(); setState(() { _size = random.nextInt(200).toDouble() + 100; }); }, child: AnimatedContainer( duration: Duration(seconds: 1), width: _size, height: _size, child: Image.asset('assets/sample.png'), curve: Curves.fastOutSlowIn, ), ), ], ), ), ); } } |