Flutter自定义底部导航栏的方法

本文实例为大家分享了Flutter自定义底部导航栏的具体代码，供大家参考，具体内容如下

文件结构：

main.dart

import 'package:flutter/material.dart';
import 'pages/tabs.dart';
?
void main() => runApp(new MyApp());
?
class MyApp extends StatelessWidget {
? @override
? Widget build(BuildContext context) {
? ? return MaterialApp(
? ? ? home: Tabs(),
? ? );
? }
}

tabs.dart

import 'package:flutter/material.dart';
import 'tabs/home.dart';
import 'tabs/category.dart';
import 'tabs/user.dart';
class Tabs extends StatefulWidget {
? Tabs({Key key}) : super(key: key);
? @override
? _TabsState createState() => _TabsState();
}
?
class _TabsState extends State<Tabs> {
? int _currentIndex = 0;
?
? List _pageList=[
? ? HomePage(),
? ? CategoryPage(),
? ? UserPage(),
? ];
?
?
? @override
? Widget build(BuildContext context) {
? ? return Scaffold(
? ? ? appBar: AppBar(
? ? ? ? title: Text('自定义底部导航'),
? ? ? ),
? ? ? body: this._pageList[this._currentIndex],
? ? ? bottomNavigationBar: BottomNavigationBar(
? ? ? ? currentIndex: this._currentIndex,
? ? ? ? onTap: (int index) {
? ? ? ? ? setState(() {
? ? ? ? ? ? this._currentIndex = index;
? ? ? ? ? });
? ? ? ? },
? ? ? ? items: [
? ? ? ? ? BottomNavigationBarItem(
? ? ? ? ? ? icon: Icon(Icons.home),
? ? ? ? ? ? title: Text('首页'),
? ? ? ? ? ),
? ? ? ? ? BottomNavigationBarItem(
? ? ? ? ? ? icon: Icon(Icons.category),
? ? ? ? ? ? title: Text('分类'),
? ? ? ? ? ),
? ? ? ? ? BottomNavigationBarItem(
? ? ? ? ? ? icon: Icon(Icons.supervised_user_circle),
? ? ? ? ? ? title: Text('会员'),
? ? ? ? ? ),
? ? ? ? ],
? ? ? ),
? ? );
? }
}

home.dart

import 'package:flutter/material.dart';
?
class HomePage extends StatefulWidget {
? HomePage({Key key}) : super(key: key);
?
? @override
? _HomePageState createState() => _HomePageState();
}
?
class _HomePageState extends State<HomePage> {
? @override
? Widget build(BuildContext context) {
? ? return Text('首页');
? }
}

category.dart

import 'package:flutter/material.dart';
?
class CategoryPage extends StatefulWidget {
? CategoryPage({Key key}) : super(key: key);
?
? @override
? _CategoryPageState createState() => _CategoryPageState();
}
?
class _CategoryPageState extends State<CategoryPage> {
? @override
? Widget build(BuildContext context) {
? ? return Text('分类');
? }
}

user.dart

import 'package:flutter/material.dart';
?
class UserPage extends StatefulWidget {
? UserPage({Key key}) : super(key: key);
?
? @override
? _UserPageState createState() => _UserPageState();
}
?
class _UserPageState extends State<UserPage> {
? @override
? Widget build(BuildContext context) {
? ? return Text('会员');
? }
}

效果展示：

来源：https://blog.csdn.net/u013227399/article/details/103787189