欢迎页

import 'package:flutter/material.dart';
import 'package:intro_slider/intro_slider.dart';
import 'package:shared_preferences/shared_preferences.dart';
main()=> runApp(MaterialApp(
  home: SplashScreen(),
));

class SplashScreen extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return new SplashScreenState() ;
  }
}
class SplashScreenState extends State<SplashScreen> {
  List<Slide> slides = new List();
  @override
  void initState() {
    super.initState();
    slides.add(
      new Slide(
        title: "Flutter",
        description:
        "Flutter是谷歌的移动UI框架，可以快速在iOS和Android上构建高质量的原生用户界面。 Flutter可以与现有的代码一起工作。在全世界，Flutter正在被越来越多的开发者和组织使用，并且Flutter是完全免费、开源的。",
        styleDescription: TextStyle(
            color: Colors.white,
            fontSize: 20.0,
            fontFamily: 'Raleway'),
        marginDescription: EdgeInsets.only(left: 20.0, right: 20.0, top: 20.0, bottom: 70.0),
        colorBegin: Color(0xffFFDAB9),
        colorEnd: Color(0xff40E0D0),
        directionColorBegin: Alignment.topLeft,
        directionColorEnd: Alignment.bottomRight,
      ),
    );
    slides.add(
      new Slide(
        title: "Wanandroid",
        description:
        "这是一款使用Flutter写的WanAndroid客户端应用，在Android和IOS都完美运行,可以用来入门Flutter，简单明了，适合初学者,项目完全开源，如果本项目确实能够帮助到你学习Flutter，谢谢start，有问题请提交Issues,我会及时回复。",
        styleDescription: TextStyle(
            color: Colors.white,
            fontSize: 20.0,
            fontFamily: 'Raleway'),
        marginDescription: EdgeInsets.only(left: 20.0, right: 20.0, top: 20.0, bottom: 70.0),
        colorBegin: Color(0xffFFFACD),
        colorEnd: Color(0xffFF6347),
        directionColorBegin: Alignment.topLeft,
        directionColorEnd: Alignment.bottomRight,
      ),
    );
    slides.add(
      new Slide(
        title: "Welcome",
        description:
        "赠人玫瑰，手有余香；\n分享技术，传递快乐。",
        styleDescription: TextStyle(
            color: Colors.white,
            fontSize: 20.0,
            fontFamily: 'Raleway'),
        marginDescription: EdgeInsets.only(left: 20.0, right: 20.0, top: 20.0, bottom: 70.0),
        colorBegin: Color(0xffFFA500),
        colorEnd: Color(0xff7FFFD4),
        directionColorBegin: Alignment.topLeft,
        directionColorEnd: Alignment.bottomRight,
      ),
    );
  }
  void onDonePress() {
    _setHasSkip();
    Navigator.of(context).pushAndRemoveUntil(
        new MaterialPageRoute(
            builder: (context) => App()),
            (route) => route == null);
  }

  void _setHasSkip ()async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    await prefs.setBool("hasSkip", true);
  }
  @override
  Widget build(BuildContext context) {
    return IntroSlider(
      slides: this.slides,
      onDonePress: this.onDonePress,
      nameSkipBtn: "跳过",
      nameNextBtn: "下一页",
      nameDoneBtn: "进入",
    );
  }
}


class App extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    // TODO: implement build
    return Scaffold(
      appBar: AppBar(title: Text('sss'),),
      body: Text('sss'),
    );
  }
}