效果图

import 'dart:async';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'jumpPage.dart';

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

  @override
  State<TransitPage> createState() => _TransitPage();
}

class _TransitPage extends State<TransitPage> {
  late Timer _timer;
  int _currentTime = 6;
  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    _timer = Timer.periodic(Duration(milliseconds: 1000), (timer) {
      setState(() {
        _currentTime--;
      });
      if(_currentTime<=0){
        _jumpRoutePage();

      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Stack(
        children: [
          Image.asset(
              "images/page.png",
            fit: BoxFit.cover,
            width: MediaQuery.of(context).size.width,
            height: MediaQuery.of(context).size.height,
          ),
          Positioned(
            top: MediaQuery.of(context).padding.top+30,
            right: MediaQuery.of(context).padding.right+30,
            child: InkWell(
              child: _clipButton(),
              onTap: (){
                _jumpRoutePage();
              },
            ),
          )
        ],
      ),

    );
  }
  Widget _clipButton() {

    return ClipRRect(
      borderRadius: BorderRadius.circular(40),
      child: Container(
        height: 50,
        width: 50,
        color: Colors.black.withOpacity(0.5),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Text("跳过",style: TextStyle(color: Colors.white,fontSize: 12),),
            Text("${_currentTime}s",style: TextStyle(color: Colors.white,fontSize: 12),),
          ],
        ),

      ),
    );
  }
  //倒计结束或点击跳过后的页面
  void _jumpRoutePage() {
    _timer.cancel();
    Navigator.pushAndRemoveUntil(context, MaterialPageRoute(builder: (BuildContext context)=>TransitPage2()), (route) => false);
  }
}