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。

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。