你能给SingleChildScrollView添加一个AppBar(或类似的东西)吗？

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: NestedScrollView(
          headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
            return <Widget>[
              SliverAppBar(
                title: Text('My App'),
                floating: true,
                pinned: true,
                snap: true,
                expandedHeight: 200,
                flexibleSpace: FlexibleSpaceBar(
                  background: Image.network(
                    'https://example.com/image.jpg',
                    fit: BoxFit.cover,
                  ),
                ),
              ),
            ];
          },
          body: SingleChildScrollView(
            child: Column(
              children: <Widget>[
                // 添加其他内容
              ],
            ),
          ),
        ),
      ),
    );
  }
}