如何在Flutter中长按底部导航栏项目后禁用弹出/吐司？

import 'package:flutter/material.dart';
import 'package:fluttertoast/fluttertoast.dart';

class MyBottomNavigationBar extends StatefulWidget {
  @override
  _MyBottomNavigationBarState createState() => _MyBottomNavigationBarState();
}

class _MyBottomNavigationBarState extends State<MyBottomNavigationBar> {
  bool isLongPressEnabled = true;

  @override
  Widget build(BuildContext context) {
    return BottomNavigationBar(
      items: [
        BottomNavigationBarItem(
          icon: GestureDetector(
            onLongPress: () {
              setState(() {
                isLongPressEnabled = false;
              });
            },
            child: Icon(Icons.home),
          ),
          label: 'Home',
        ),
        BottomNavigationBarItem(
          icon: GestureDetector(
            onLongPress: () {
              setState(() {
                isLongPressEnabled = false;
              });
            },
            child: Icon(Icons.settings),
          ),
          label: 'Settings',
        ),
      ],
      onTap: (index) {
        if (isLongPressEnabled) {
          // 执行点击操作
          // ...
        }
      },
    );
  }
}

void main() {
  runApp(MaterialApp(
    home: Scaffold(
      bottomNavigationBar: MyBottomNavigationBar(),
    ),
  ));
}