如何使用显示对话框(Flutter )内的综合浏览量

第一部分是一个自动页面，我想在一个带有flatter的对话框中创建它.

这是我用来try 的代码，但我无法得到我想要的

请通过在对话框中显示页面视图和自动指示器来帮助我

import 'package:flutter/material.dart';

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

  @override
  State<HomePage> createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  final PageController _controller = PageController(initialPage: 0);

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: ElevatedButton(
          child: const Text("Show Dialog"),
          onPressed: () {
            showDialog(
              context: context,
              builder: (BuildContext context) => AlertDialog(
                title: const Text('Warning'),
                content: PageView(
                  controller: _controller,
                  children: [
                    Container(width: double.infinity, height: double.infinity, color: Colors.yellow),
                    Container(width: double.infinity, height: double.infinity, color: Colors.red),
                    Container(width: double.infinity, height: double.infinity, color: Colors.black),
                  ],
                ),
                actionsAlignment: MainAxisAlignment.center,
                actions: <Widget>[
                  Column(
                    children: [
                      ElevatedButton(onPressed: () {}, child: const Text("CONTINUE")),
                      OutlinedButton(onPressed: () {}, child: const Text("NO THANKS"))
                    ],
                  ),
                ],
              ),
            );
          },
        ),
      ),
    );
  }
}