一次在所有按钮上调用Flutter函数

import 'package:flutter/material.dart';

class MyButton extends StatefulWidget {
  final VoidCallback onPressed;

  MyButton({required this.onPressed});

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

class _MyButtonState extends State<MyButton> {
  @override
  Widget build(BuildContext context) {
    return RaisedButton(
      onPressed: widget.onPressed,
      child: Text('按钮'),
    );
  }
}

void main() {
  runApp(MaterialApp(
    home: Scaffold(
      appBar: AppBar(
        title: Text('按钮示例'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            MyButton(
              onPressed: myFunction,
            ),
            MyButton(
              onPressed: myFunction,
            ),
            MyButton(
              onPressed: myFunction,
            ),
          ],
        ),
      ),
    ),
  ));
}

void myFunction() {
  // 在这里编写按钮点击后的操作
  print('按钮被点击了');
}