Flutter实现底部导航栏

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。

来源：https://blog.csdn.net/qq_33419925/article/details/84987282