flutter_demo/lib/main.dart

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_demo/constants.dart';

import 'Screens/Guide/guide_screen.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    // Size size = MediaQuery.of(context).size;
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Demo',
      theme: ThemeData(
          primaryColor: kPrimaryColor,
          scaffoldBackgroundColor: Colors.white,
          primaryColorLight: kPrimaryLightColor),
      home: Scaffold(
        body: SplashScreen(),
      ),
    );
  }
}

class SplashScreen extends StatefulWidget {
  const SplashScreen({Key? key}) : super(key: key);

  @override
  State<SplashScreen> createState() => _SplashScreenState();
}

class _SplashScreenState extends State<SplashScreen> {
  int _countdown = 3;
  Timer? _countdownTimer;

  @override
  void initState() {
    super.initState();
    _startRecordTime();
  }

  /// 定时自动跳转页面
  void _startRecordTime() {
    _countdownTimer = Timer.periodic(Duration(seconds: 1), (timer) {
      setState(() {
        if (_countdown <= 1) {
          Navigator.of(context).pop();
          Navigator.of(context).push(MaterialPageRoute(builder: (context) {
            return GuideScreen();
          }));
          _countdownTimer?.cancel();
          _countdownTimer = null;
        } else {
          _countdown -= 1;
        }
      });
    });
  }

  @override
  void dispose() {
    super.dispose();
    if (_countdownTimer != null && _countdownTimer!.isActive) {
      _countdownTimer!.cancel();
      _countdownTimer = null;
    }
  }

  @override
  Widget build(BuildContext context) {
    SystemChrome.setEnabledSystemUIOverlays([]);
    Size size = MediaQuery.of(context).size;
    return Container(
      height: size.height,
      width: double.infinity,
      color: Color(0xffc3eff2),
      constraints: BoxConstraints.expand(),
      child: Stack(
        alignment: AlignmentDirectional.bottomCenter,
        children: <Widget>[
          Positioned(
              bottom: 60,
              child: Row(
                children: <Widget>[
                  Image(
                    image: AssetImage('assets/images/logo.png'),
                    width: 80,
                    height: 80,
                  ),
                  Padding(
                    padding: const EdgeInsets.only(left: 25),
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: <Widget>[
                        Text(
                          "享有康康",
                          style: TextStyle(
                            color: Color(0xff42c293),
                            fontSize: 24,
                            fontStyle: FontStyle.italic,
                            fontWeight: FontWeight.w700,
                            decoration: TextDecoration.none,
                          ),
                        ),
                        Text(
                          "为您的家庭保驾护航",
                          style: TextStyle(
                              fontWeight: FontWeight.w600,
                              decoration: TextDecoration.none,
                              fontSize: 15,
                              color: Color(0xff6e6e6e)),
                        )
                      ],
                    ),
                  )
                ],
              ))
        ],
      ),
    );
  }
}