Flutter如何在BottomNavigationBar中禁用幻灯片动画

import 'package:flutter/material.dart';

class CustomBottomNavigationBar extends StatefulWidget {
  @override
  _CustomBottomNavigationBarState createState() =>
      _CustomBottomNavigationBarState();
}

class _CustomBottomNavigationBarState extends State<CustomBottomNavigationBar> {
  int _currentIndex = 0;
  final List<Widget> _pages = [
    // 定义页面组件
    // 页面1
    Container(
      color: Colors.blue,
    ),
    // 页面2
    Container(
      color: Colors.red,
    ),
    // 页面3
    Container(
      color: Colors.green,
    ),
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: PageView(
        physics: NeverScrollableScrollPhysics(), // 禁用滑动切换
        children: _pages,
      ),
      bottomNavigationBar: BottomNavigationBar(
        currentIndex: _currentIndex,
        onTap: (index) {
          setState(() {
            _currentIndex = index;
          });
        },
        items: [
          BottomNavigationBarItem(
            icon: Icon(Icons.home),
            label: 'Home',
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.search),
            label: 'Search',
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.person),
            label: 'Profile',
          ),
        ],
      ),
    );
  }
}