如何正确使用复选框来启用和禁用flutter中的按钮？

import 'package:flutter/material.dart';

bool isChecked = false;

Checkbox(
  value: isChecked,
  onChanged: (bool value) {
    setState(() {
      isChecked = value;
    });
  },
),

ElevatedButton(
  onPressed: isChecked ? () {
    // 按钮被点击时执行的操作
  } : null,
  child: Text('按钮'),
),

import 'package:flutter/material.dart';

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

class _MyWidgetState extends State<MyWidget> {
  bool isChecked = false;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Checkbox(
              value: isChecked,
              onChanged: (bool value) {
                setState(() {
                  isChecked = value;
                });
              },
            ),
            ElevatedButton(
              onPressed: isChecked ? () {
                // 按钮被点击时执行的操作
              } : null,
              child: Text('按钮'),
            ),
          ],
        ),
      ),
    );
  }
}