issues_109020

main.dart

import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';

abstract class Routes {
  static const splash = '/';
  static const home = '/home';
}

void main() => runApp(const MyApp());

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  late final GoRouter _router;
  void _splashScreenListener() async {
    if (_router.location == Routes.splash) {
      await Future.delayed(const Duration(seconds: 5));
      _router.go(Routes.home);
    }
  }

  @override
  void initState() {
    _router = GoRouter(
      routes: [
        GoRoute(
          path: Routes.splash,
          builder: (context, state) => const SplashScreen(),
        ),
        GoRoute(
          path: Routes.home,
          pageBuilder: (context, state) => CustomTransitionPage<void>(
            key: state.pageKey,
            child: const HomePage(),
            transitionsBuilder: (context, animation, _, child) {
              final tween = Tween(
                begin: const Offset(0.0, 1.0),
                end: Offset.zero,
              ).chain(CurveTween(curve: Curves.ease));

              return SlideTransition(
                position: animation.drive(tween),
                child: child,
              );
            },
          ),
        ),
      ],
    )..addListener(_splashScreenListener);
    super.initState();
  }

  @override
  void dispose() {
    _router
      ..removeListener(_splashScreenListener)
      ..dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp.router(
      routeInformationParser: _router.routeInformationParser,
      routerDelegate: _router.routerDelegate,
      routeInformationProvider: _router.routeInformationProvider,
    );
  }
}

class SplashScreen extends StatefulWidget {
  final Duration animationDuration;
  const SplashScreen({
    super.key,
    this.animationDuration = const Duration(seconds: 1),
  });

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

class _SplashScreenState extends State<SplashScreen>
    with TickerProviderStateMixin {
  late final AnimationController _controller;
  late final Animation<double> _animation;
  @override
  void initState() {
    _controller = AnimationController(
      duration: widget.animationDuration,
      vsync: this,
    )..repeat(reverse: true);
    _animation = CurvedAnimation(
      parent: _controller,
      curve: Curves.easeIn,
    );
    super.initState();
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(context) => Scaffold(
        body: Center(
          child: FadeTransition(
            opacity: _animation,
            child: FlutterLogo(
              size: MediaQuery.of(context).size.shortestSide / 2,
            ),
          ),
        ),
      );
}

class HomePage extends StatelessWidget {
  const HomePage({super.key});
  @override
  Widget build(BuildContext context) => Scaffold(
        appBar: AppBar(title: const Text('home')),
        body: const Center(child: FlutterLogo()),
      );
}