有没有办法在flutter中检测我的屏幕上的多个触摸？

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Multi-touch Detection'),
        ),
        body: Center(
          child: GestureDetector(
            onScaleStart: (ScaleStartDetails details) {
              // 处理缩放开始事件
              print('Scale start: ${details.focalPoint}');
            },
            onScaleUpdate: (ScaleUpdateDetails details) {
              // 处理缩放过程中事件
              print('Scale update: ${details.scale}');
            },
            onScaleEnd: (ScaleEndDetails details) {
              // 处理缩放结束事件
              print('Scale end');
            },
            child: Container(
              width: 200,
              height: 200,
              color: Colors.blue,
            ),
          ),
        ),
      ),
    );
  }
}