如何在widget方法中将变量作为状态传递？

import 'package:flutter/material.dart';

class MyCustomWidget extends StatefulWidget {
  final String variable; // 接收传递的变量

  MyCustomWidget({required this.variable});

  @override
  _MyCustomWidgetState createState() => _MyCustomWidgetState();
}

class _MyCustomWidgetState extends State<MyCustomWidget> {
  late String _variable; // 存储传递的变量

  @override
  void initState() {
    super.initState();
    _variable = widget.variable;
  }

  @override
  Widget build(BuildContext context) {
    return Text(_variable); // 使用传递的变量构建视图
  }
}

void main() {
  runApp(MaterialApp(
    home: Scaffold(
      appBar: AppBar(
        title: Text('Widget Variable State Passing Example'),
      ),
      body: Center(
        child: MyCustomWidget(variable: 'Hello World!'), // 传递变量给自定义Widget
      ),
    ),
  ));
}