android - 是否有可能得到一个没有图标/只有文本的 bottomNavBar

Question

我想要一个底部导航栏，但选项卡应该是纯文本的。问题是，该图标是 BottomNavigationBarItem() 的必需属性。

编辑:我使用标签栏作为底部导航栏让它工作，但@Fernando Rocha 的解决方案似乎不那么棘手并且效果更好。总而言之，只需向每个图标添加“大小:0”(您仍然需要一个图标)。

Answer 1

我在图标大小上使用了 0 号并且它起作用了

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

/// This Widget is the main application widget.
class MyApp extends StatelessWidget {
  static const String _title = 'Flutter Code Sample';

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: _title,
      home: MyStatefulWidget(),
    );
  }
}

class MyStatefulWidget extends StatefulWidget {
  MyStatefulWidget({Key key}) : super(key: key);

  @override
  _MyStatefulWidgetState createState() => _MyStatefulWidgetState();
}

class _MyStatefulWidgetState extends State<MyStatefulWidget> {
  int _selectedIndex = 0;
  static const TextStyle optionStyle =
      TextStyle(fontSize: 30, fontWeight: FontWeight.bold);
  static const List<Widget> _widgetOptions = <Widget>[
    Text(
      'Index 0: Home',
      style: optionStyle,
    ),
    Text(
      'Index 1: Business',
      style: optionStyle,
    ),
    Text(
      'Index 2: School',
      style: optionStyle,
    ),
  ];

  void _onItemTapped(int index) {
    setState(() {
      _selectedIndex = index;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('BottomNavigationBar Sample'),
      ),
      body: Center(
        child: _widgetOptions.elementAt(_selectedIndex),
      ),
      bottomNavigationBar: BottomNavigationBar(
        items: const <BottomNavigationBarItem>[
          BottomNavigationBarItem(
            icon: Icon(Icons.home, size: 0),
            title: Text('Home'),
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.business, size: 0),
            title: Text('Business'),
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.school, size: 0),
            title: Text('School'),
          ),
        ],
        currentIndex: _selectedIndex,
        selectedItemColor: Colors.amber[800],
        onTap: _onItemTapped,
      ),
    );
  }
}