chatting/lib/app_page.dart

import 'package:chatting/chatting_api.dart';
import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';
import 'package:chatting/chatting_page.dart';
import 'package:chatting/chatting_friend.dart';
import 'package:chatting/discover_page.dart';
import 'package:chatting/personal_page.dart';

ChattingApi chattingApi = new ChattingApi();

class App extends StatefulWidget {
  @override
  _AppState createState() => _AppState();
}

class _AppState extends State<App> {

  final List<BottomNavigationBarItem> bottomTabs = [
    BottomNavigationBarItem(
        icon: Icon(IconData(0xe608,fontFamily: 'appIconFonts')), title: Text('聊天')),
    BottomNavigationBarItem(
        icon: Icon(IconData(0xe601,fontFamily: 'appIconFonts')), title: Text('好友')),
    BottomNavigationBarItem(
        icon: Icon(IconData(0xe600,fontFamily: 'appIconFonts')), title: Text('发现')),
    BottomNavigationBarItem(
        icon: Icon(IconData(0xe607,fontFamily: 'appIconFonts')), title: Text('我的')),
  ];

  final List<Widget> tabBodies = [
    ChattingPage(),
    ChattinFriendPage(),
    DiscoverPage(),
    PersonalPage()
  ];

  int currentIndex = 0;
  var currentPage;


  @override
  void initState() {
    currentPage = tabBodies[currentIndex];
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return  Scaffold(
      backgroundColor: Color.fromRGBO(244, 245, 245, 1.0),
      bottomNavigationBar: BottomNavigationBar(
        type: BottomNavigationBarType.fixed,
        currentIndex: currentIndex,
        items: bottomTabs,
        onTap: (index) {
          setState(() {
            currentIndex = index;
            currentPage = tabBodies[currentIndex];
          });
        },
      ),
      //body: currentPage,
      body: IndexedStack(
          index: currentIndex,
          children: tabBodies,
      ),
    );
  }
}