更多代码参考
有短暂的白屏时间
import 'dart:async'; import 'package:flutter/material.dart'; import 'package:flutter/services.dart'; void main() => runApp(MyApp()); class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: '启动图demo', debugShowCheckedModeBanner: false, home: AnimatedSplashScreen( home: HomePage(), ), ); } } class AnimatedSplashScreen extends StatefulWidget { final Widget home; const AnimatedSplashScreen({Key key, @required this.home}) : super(key: key); @override SplashScreenState createState() => new SplashScreenState(); } class SplashScreenState extends State<AnimatedSplashScreen> with SingleTickerProviderStateMixin { AnimationController animationController; Animation<double> animation; Duration keepTimer = Duration(seconds: 3); int get showSecond => keepTimer.inSeconds; Timer timer; bool isSkip = false; startTime() async { await Future.delayed(keepTimer); _toHome(); } _toHome() { if (isSkip) return; isSkip = true; Navigator.of(context) .pushReplacement(MaterialPageRoute(builder: (context) => widget.home)); } @override void initState() { super.initState(); animationController = AnimationController(vsync: this, duration: Duration(seconds: 2)); animation = CurvedAnimation(parent: animationController, curve: Curves.easeOut); animation.addListener(() => this.setState(() {})); animationController.forward(); // startTime(); Duration step = Duration(seconds: 1); timer = Timer.periodic(Duration(seconds: 1), (_) { setState(() { keepTimer -= step; }); if (keepTimer == Duration.zero) { timer.cancel(); } }); } @override void dispose() { animationController?.dispose(); timer?.cancel(); SystemChrome.setEnabledSystemUIOverlays(SystemUiOverlay.values); super.dispose(); } @override Widget build(BuildContext context) { SystemChrome.setEnabledSystemUIOverlays([SystemUiOverlay.top]); return Scaffold( body: Stack( fit: StackFit.expand, children: <Widget>[ Positioned( right: 10, bottom: 50, child: Padding( padding: const EdgeInsets.all(8.0), child: FlatButton( color: Colors.grey[300], textColor: Colors.white, shape: RoundedRectangleBorder( borderRadius: BorderRadius.circular(20), ), onPressed: _toHome, child: Text('跳过 $showSecond'), ), ), ), Column( mainAxisAlignment: MainAxisAlignment.end, mainAxisSize: MainAxisSize.min, children: <Widget>[ Padding( padding: EdgeInsets.only(bottom: 30.0), child: Image.asset( 'assets/images/powered_by.png', height: 25.0, fit: BoxFit.scaleDown, )) ], ), Column( mainAxisAlignment: MainAxisAlignment.center, children: <Widget>[ Image.asset( 'assets/images/logo.png', width: animation.value * 250, height: animation.value * 250, ), ], ), ], ), ); } } class HomePage extends StatefulWidget { @override _HomePageState createState() => _HomePageState(); } class _HomePageState extends State<HomePage> { @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text('Home'), ), body: Center( child: RaisedButton( child: Text('data'), onPressed: () async {}, ), ), ); } }转载于:https://www.cnblogs.com/ajanuw/p/11154536.html
