在授权前隐藏图标，使用BottomNavigationBar后在flatter中显示

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('Bottom Navigation Bar Example'),
        ),
        body: Center(
          child: Text('Content goes here'),
        ),
        bottomNavigationBar: BottomNavigationBar(
          items: [
            BottomNavigationBarItem(
              icon: null, // 设置图标为null，隐藏图标
              label: 'Home',
            ),
            BottomNavigationBarItem(
              icon: null, // 设置图标为null，隐藏图标
              label: 'Profile',
            ),
            BottomNavigationBarItem(
              icon: null, // 设置图标为null，隐藏图标
              label: 'Settings',
            ),
          ],
        ),
      ),
    );
  }
}