如何在flutter中延迟可见性信息？例如等待2秒，然后开始动画

import 'package:flutter/material.dart';

class DelayedVisibilityExample extends StatefulWidget {
  @override
  _DelayedVisibilityExampleState createState() =>
      _DelayedVisibilityExampleState();
}

class _DelayedVisibilityExampleState extends State<DelayedVisibilityExample> {
  bool isVisible = false;

  @override
  void initState() {
    super.initState();
    // 延迟2秒后显示可见性信息
    Future.delayed(Duration(seconds: 2), () {
      setState(() {
        isVisible = true;
      });
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Delayed Visibility Example'),
      ),
      body: Center(
        child: Visibility(
          visible: isVisible,
          child: AnimatedContainer(
            duration: Duration(seconds: 1),
            width: isVisible ? 200 : 0,
            height: isVisible ? 200 : 0,
            color: Colors.blue,
          ),
        ),
      ),
    );
  }
}

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