如何通过在flutter中知道关键点的值来删除关键点？

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  final List<int> keyPoints = [1, 2, 3, 4, 5];

  void deleteKeyPoint(int value) {
    keyPoints.removeWhere((point) => point == value);
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Delete Key Point'),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Text('Key Points: $keyPoints'),
              ElevatedButton(
                onPressed: () {
                  deleteKeyPoint(3); // 删除关键点3
                },
                child: Text('Delete Key Point 3'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}