Flutter :如何自动滚动到SingleChildScrollView的末尾

import 'package:flutter/material.dart';

class MyWidget extends StatefulWidget {
  @override
  _MyWidgetState createState() => _MyWidgetState();
}

class _MyWidgetState extends State<MyWidget> {
  ScrollController _scrollController = ScrollController();

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance!.addPostFrameCallback((_) {
      _scrollToEnd();
    });
  }

  void _scrollToEnd() {
    _scrollController.animateTo(
      _scrollController.position.maxScrollExtent,
      duration: Duration(milliseconds: 300),
      curve: Curves.easeOut,
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('自动滚动到末尾示例'),
      ),
      body: SingleChildScrollView(
        controller: _scrollController,
        child: Column(
          children: <Widget>[
            // 添加需要滚动的内容
          ],
        ),
      ),
    );
  }
}

void main() {
  runApp(MaterialApp(
    home: MyWidget(),
  ));
}