[Flutter] BottomNavigationBar

BottomNavigationBar : 하단부분에 위치한 네비게이션

 

첫 로딩 시 또는 홈 아이콘 클릭 시

 

---

BottomNavigationBar

 

---

main.dart

 

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  static const String _title = '플러더 코드 샘플';
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: _title,
      // theme: ThemeData(
      //   primarySwatch: Colors.blue,
      //   visualDensity: VisualDensity.adaptivePlatformDensity,
      // ),
      //home: MyHomePage(),
      home: MyStatefulWidget(),
    );
  }
}

class MyStatefulWidget extends StatefulWidget {
  @override
  _MyStatefulWidgetState createState() => _MyStatefulWidgetState();
}

class _MyStatefulWidgetState extends State<MyStatefulWidget> {
  int _selectedIdx = 0;
  static const TextStyle optionStyle =
      TextStyle(
        fontSize: 30, 
        fontWeight: FontWeight.bold
      );
  static const List<Widget> _widgetOptions = <Widget>[
    Text(
      '인덱스 0: 홈',
      style: optionStyle
    ),
    Text(
      '인덱스 1: 비즈니스',
      style: optionStyle
    ),
    Text(
      '인덱스 2: 학교',
      style: optionStyle
    )
  ];

  void _onItemTapped(int idx) {
    setState(() {
      _selectedIdx = idx;
    });
  }

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