logistics-client-flutter/lib/home_page.dart

import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'pages/order_taking_page.dart';
import 'pages/order_management_page.dart';
import 'pages/send_express_page.dart';
import 'pages/my_page.dart';

class HomePage extends StatefulWidget {
  final Widget child;

  HomePage({
    Key key,
    this.child
  }): super(key: key);

  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State < HomePage > with SingleTickerProviderStateMixin{
  
   TabController _controller;
  int _currentIndex = 0;
  List<Widget> pageList =[
    OrderTakingPage(),
    OrderManagementPage(),
    SendExpressPage(),
    MyPage()
  ];

  @override
  void initState() {
    super.initState();
     _controller = TabController(length: pageList.length, vsync: this);
  }

  @override
  Widget build(BuildContext context) {
    return 
      Scaffold(
        body: TabBarView(
          physics: NeverScrollableScrollPhysics(), //禁止滚动
          controller: _controller,
          children: [
             OrderTakingPage(),
              OrderManagementPage(),
              SendExpressPage(),
              MyPage()
          ]),
        bottomNavigationBar: BottomNavigationBar(
          currentIndex: _currentIndex,
          type: BottomNavigationBarType.fixed,
          items:[
            BottomNavigationBarItem(
              icon: Image.asset('lib/images/icon_jiedan.png',scale: 1.6,),
              title: Text('接单',style: TextStyle(color:_currentIndex==0?Color.fromRGBO(64, 98, 254, 1):Colors.grey,fontSize: ScreenUtil.getInstance().setSp(20)),),
              activeIcon: Image.asset('lib/images/icon_jiedan01.png',scale: 1.6)
            ),
            BottomNavigationBarItem(
               icon: Image.asset('lib/images/icon_dingdan.png',scale: 1.6),
              title: Text('订单管理',style: TextStyle(color:_currentIndex==1?Color.fromRGBO(64, 98, 254, 1):Colors.grey,fontSize: ScreenUtil.getInstance().setSp(20)),),
              activeIcon: Image.asset('lib/images/icon_dingdan01.png',scale: 1.6)
            ),
            BottomNavigationBarItem(
               icon: Image.asset('lib/images/icon_fajian.png',scale: 1.6),
              title: Text('发件',style: TextStyle(color:_currentIndex==2?Color.fromRGBO(64, 98, 254, 1):Colors.grey,fontSize: ScreenUtil.getInstance().setSp(20)),),
              activeIcon: Image.asset('lib/images/icon_fajian01.png',scale: 1.6)
            ),
            BottomNavigationBarItem(
               icon: Image.asset('lib/images/icon_wode.png',scale: 1.6),
              title: Text('我的',style: TextStyle(color:_currentIndex==3?Color.fromRGBO(64, 98, 254, 1):Colors.grey,fontSize: ScreenUtil.getInstance().setSp(20)),),
              activeIcon: Image.asset('lib/images/icon_wode01.png',scale: 1.6)
            ),
          ],
          onTap: (index){
            setState(() {
              _currentIndex = index;
            });
            // if(_currentIndex==2){
            //    Navigator.pushReplacement(context, MaterialPageRoute(builder: (context){
            //       return SendExpressPage();
            //     }));
            // }else{
               _controller.animateTo(_currentIndex);
            //}
          },
        ),
      );
  }
}