Flutter 自定义TabBar

import 'package:flutter/material.dart';

import 'package:study_flutter/baseClass/BaseClass.dart';

import 'package:study_flutter/pages/HomeWidget.dart';

import 'package:study_flutter/pages/ForumWidget.dart';

import 'package:study_flutter/pages/MineWidget.dart';

class BaseTabBarextends StatefulWidget {

@override

  _BaseTabBarStatecreateState() =>_BaseTabBarState();

}

class _BaseTabBarStateextends State {

intselectedIndex =0;

  ListdataList;

  @override

  Widgetbuild(BuildContext context) {

dataList = [

{

"title" :"主页",

        "norImage" :"images/index_icon1.png",

        "selImage" :"images/index_icon1_selected.png",

        "page" :HomeWidget(),

      },

      {

"title" :"论坛",

        "norImage" :"images/index_icon2.png",

        "selImage" :"images/index_icon2_selected.png",

        "page" :ForumWidget(),

      },

      {

"title" :"我的",

        "norImage" :"images/index_icon3.png",

        "selImage" :"images/index_icon3_selected.png",

        "page" :MineWidget(),

      }

];

    List items =List();

    for(int i =0; i

var dic =dataList[i];

      var item =BottomNavigationBarItem(

icon:Image.asset((selectedIndex == i) ? dic["selImage"] : dic["norImage"]),

        title:Text(dic["title"]),

      );

      items.add(item);

    }

return Scaffold(

body:dataList[selectedIndex]["page"],

        bottomNavigationBar:BottomNavigationBar(

items: items,

          currentIndex:selectedIndex,

          selectedItemColor: BaseClass.kMainColor,

          onTap: clickItem,

        ),

      );

  }

void clickItem(int index) {

setState(() {

selectedIndex = index;

    });

  }

}