3秒之后自动跳转到主页面：
/**
* 广告页，3秒自动跳转到首页
*/
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:zybdapp/youshang/main.dart';
void main() {
runApp(new MaterialApp(
title: 'ad',
home: new SplashScreen(),
routes: <String, WidgetBuilder>{
'/main': (BuildContext context) => new MainScreen() // 首页widget类，省略了
},
));
}
//class MyApp extends StatelessWidget {
// @override
// Widget build(BuildContext context) {
// return new Stack(
// alignment: const Alignment(1.0, -1.0), // 右上角对齐
// children: [
// new ConstrainedBox(
// constraints: BoxConstraints.expand(),
// child: new Image.asset(
// "assets/images/ad.png",
// fit: BoxFit.fill,
// ),
// ),
// ],
// );
// }
//}
class SplashScreen extends StatefulWidget {
@override
_SplashScreenState createState() => new _SplashScreenState();
}
class _SplashScreenState extends State<SplashScreen> {
Timer _timer;
startTime() async {
//设置启动图生效时间
var _duration = new Duration(seconds: 3);
_timer = new Timer(_duration, navigationPage);
return _timer;
}
void navigationPage() {
_timer.cancel();
Navigator.of(context).pushReplacementNamed('/main');
}
@override
void initState() {
super.initState();
startTime();
}
@override
Widget build(BuildContext context) {
return new Scaffold(
body: new ConstrainedBox(
constraints: BoxConstraints.expand(),
child: new Image.asset(
"assets/images/ad.png",
fit: BoxFit.fill,
),
),
);
}
}
