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

效果

实现

先将自动生成的main.dart里面的代码删除，

import 'package:flutter/material.dart';import 'package:flutter_guohe/pages/main.dart'; void main() { runApp(new Guohe());}

创建app.dart作为首页的页面文件

class Guohe extends StatefulWidget { @override GuoheState createState() => new GuoheState();} class GuoheState extends State<Guohe> { @override Widget build(BuildContext context) { }}

创建today.dart、kb.dart、playground.dart三个页面文件作为tabview的填充文件，这里用playground.dart为例。

import 'package:flutter/material.dart'; class Playground extends StatefulWidget { @override PlaygroundState createState() => new PlaygroundState();} class PlaygroundState extends State<Playground> { @override Widget build(BuildContext context) { return new MaterialApp( home: new Scaffold( appBar: new AppBar( title: new Text("操场"), backgroundColor: Color.fromARGB(255, 119, 136, 213), //设置appbar背景颜色 centerTitle: true, //设置标题是否局中 ), body: new Center( child: new Text('操场'), ), ), ); }}

app.dart的完整代码

/** * APP的主入口文件 */ import 'package:flutter/material.dart'; import 'package:flutter_guohe/pages/main/today.dart';import 'package:flutter_guohe/pages/main/playground.dart';import 'package:flutter_guohe/pages/main/kb.dart';import 'package:flutter_guohe/pages/main/leftmenu.dart'; import 'package:flutter_guohe/common/eventBus.dart'; //果核的主界面class Guohe extends StatefulWidget { @override GuoheState createState() => new GuoheState();} class GuoheState extends State<Guohe> with SingleTickerProviderStateMixin { TabController controller; @override void initState() { controller = new TabController(length: 3, vsync: this); } @override void dispose() { controller.dispose(); super.dispose(); } @override Widget build(BuildContext context) { return new MaterialApp( home: new Scaffold( drawer: new LeftMenu(), body: new TabBarView( controller: controller, children: <Widget>[ new Today(), new Kb(), new Playground(), ], ), bottomNavigationBar: new Material( color: Colors.white, child: new TabBar( controller: controller, labelColor: Colors.deepPurpleAccent, unselectedLabelColor: Colors.black26, tabs: <Widget>[ new Tab( text: "今日", icon: new Icon(Icons.brightness_5), ), new Tab( text: "课表", icon: new Icon(Icons.map), ), new Tab( text: "操场", icon: new Icon(Icons.directions_run), ), ], ), ), ), ); }}

其中

labelColor: Colors.deepPurpleAccent,unselectedLabelColor: Colors.black26,

第一个属性是控制标签颜色，这里我选了紫色，第二个属性是未选中标签时的颜色。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。