用Flutter手撸一个抖音国际版看看有多炫

肉眼品世界导读： 本文为启明星技术架构师社群作者投稿，字节跳动选择了flutter作为混合开发的语言，Flutter “一出生”就以“UI 漂亮、像素级可控、性能流畅、可媲美原生性能”等特点吸引广大开发者的眼球，自渲染引擎甚至具备开发游戏的能力。
更多优质内容请关注微信公众号“肉眼品世界”（ID：find_world_fine），深度价值体系传递

技术日新月异，都是站在巨人肩膀上的思考，前端发展至今，不断的在追求简单、效率和标准上节节高升，vue依然是国内开发者首选，特别是创业公司；而在追求极致性能效果上，字节选择了fluter,和其业务形式莫不相关

简介

最近花了两天时间研究使用Flutter开发一个抖音国际版. 个人感觉使用Flutter开发app快得不要不要的额. 两天就基本可以开发个大概出来. 最主要是热重载，太方便实时调整UI布局了. 相应速度极快. 如下图：

主要项目架构

详细说明一下，开发主要在lib文件夹

pubspec.yaml是配置插件的位置，如http: ^0.12.0+4，类似依赖组件.
common文件夹存放的是重写的网络组件，以及图标组件icons.dart
config文件夹存放的api.dart，wei调用的api配置文件
models文件存放的实体层
screen文件夹存放的页面view层
tabs存放的底部切换文件夹层
widgets存放的组件，包含视频播放组件player.dart以及左右等描述组件

功能介绍

主要的依赖组件，请使用国内镜像下载，切记切记！！！！

flutter
:    sdk: flutterflutter_svg: ^0.17.4# The following adds the Cupertino Icons font to your application.# Use with the CupertinoIcons class for iOS style icons.cupertino_icons: ^0.1.3cached_network_image: ^2.2.0json_annotation: ^3.0.1font_awesome_flutter: ^8.8.1http: ^0.12.0+4provider: ^4.0.4avatar_glow: anygetflutter: ^1.0.11flutter_money_formatter: ^0.8.3video_player: ^0.10.8+1dio: ^3.0.9dio_cookie_manager: ^1.0.0！

包含文字字体，主要为抖音自带字体:

import'package:flutter/widgets.dart'
;
class DouyinIcons {DouyinIcons._();static const _kFontFam = 'DouyinIcons';static const IconData chat_bubble =const IconData(0xe808, fontFamily: _kFontFam);static const IconData create = const IconData(0xe809, fontFamily: _kFontFam);static const IconData heart = const IconData(0xe80a, fontFamily: _kFontFam);static const IconData home = const IconData(0xe80b, fontFamily: _kFontFam);static const IconData messages =const IconData(0xe80c, fontFamily: _kFontFam);static const IconData profile = const IconData(0xe80d, fontFamily: _kFontFam);static const IconData reply = const IconData(0xe80e, fontFamily: _kFontFam);static const IconData search = const IconData(0xe80f, fontFamily: _kFontFam);
}

此次采用Flutter开发安卓、IOS等 app确实方便，主要为将tiktok的数据使用http下载下来.

import 'package:http/http.dart' as http;class RequestController {static String host = "https://www.tiktok.com/";String url = host +"/share/item/list?secUid=&id=&type=5&count=30&minCursor=0&maxCursor=0&shareUid=&lang=en&_signature=pKb.ogAgEB9ImoSQahoqJKSm.rAAPox";Future<String> getCookie() async {try {var response = await http.get(host + "/share/item/");return response.headers["set-cookie"];} catch (e) {return "error";}}

Model层

主要为实体层，解析json后绑定数据以及传递数据

class Tiktok {int statueCode;Body body;Object errMsg;Tiktok({this.statueCode, this.body, this.errMsg});Tiktok.fromJson(Map<String, dynamic> json) {statueCode = json['statusCode'];body = json['body'] != null ? new Body.fromJson(json['body']) : null;errMsg = json['errMsg'];}Map<String, dynamic> toJson() {final Map<String, dynamic> data = new Map<String, dynamic>();data['statusCode'] = this.statueCode;if (this.body != null) {data['body'] = this.body.toJson();}data['errMsg'] = this.errMsg;return data;}
}

视图层

另外屏幕层主要包含三个，homescreen，trendingscreen，以及显示videoscreen

import 'package:flutter/material.dart';
import 'package:flutter_app/Screens/trendingScreen.dart';
import 'package:flutter_app/widgets/bottom_toolbar.dart';class Home extends StatefulWidget {@overrideHomeState createState() => HomeState();
}class HomeState extends State<Home> {int currentIndex = 0;PageController pageController;@overrideWidget build(BuildContext context) {return Scaffold(body: PageView(controller: pageController,children: <Widget>[Trending(),],onPageChanged: (int index) {setState(() {currentIndex = index;});},),bottomNavigationBar: bottomItems(currentIndex, pageController),);}
}

Tending层，主要包含读取抖音的api，将api转化成实体对象，绑定数据到videoscreen页面

import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';
import 'package:getflutter/getflutter.dart';
import 'package:flutter_app/config/api.dart';
import 'package:flutter_app/models/Tiktok.dart';
import 'package:http/http.dart' as http;
import 'package:flutter_app/Screens/videoScreen.dart';class Trending extends StatefulWidget {_TrendingState createState() => _TrendingState();
}class _TrendingState extends State<Trending> {PageController pageController;BuildContext context;RequestController api = RequestController();List<Widget> videos = [];getTrending() async {var cookies = await api.getCookie();api.setCookie(cookies);try {var response = await http.get(api.url,headers: api.headers,);Tiktok tiktok = Tiktok.fromJson(jsonDecode(response.body));tiktok.body.itemListData.forEach((item) {setState(() {videos.add(VideoItem(data: item));});},);} catch (ex) {SimpleDialog(title: Text('Hot videos list is empty'),);print(ex);}}@overridevoid initState() {super.initState();getTrending();}@overrideWidget build(BuildContext context) {context = context;return PageView(scrollDirection: Axis.vertical,controller: pageController,children: videos.length == 0? <Widget>[Container(color: Colors.black,child: Center(child: GFLoader(type: GFLoaderType.circle,loaderColorOne: Colors.blueAccent,loaderColorTwo: Colors.white,loaderColorThree: Colors.pink,),),)]: videos,);}
}

VideoScreen主要为绑定数据. 展示抖音的视频

import 'package:flutter/material.dart';
import 'package:flutter_app/models/Tiktok.dart';
import 'package:flutter_app/widgets/video_description.dart';
import 'package:flutter_app/widgets/actions_toolbar.dart';
import 'package:flutter_app/widgets/player.dart';class VideoItem extends StatelessWidget {final ItemListData data;const VideoItem({@required this.data});@overrideWidget build(BuildContext context) {return Scaffold(body: Stack(children: <Widget>[DouyinVideoPlayer(url: data.itemInfos.video.urls[0],),title(),VideoDescription(description: data.itemInfos.text,musicName: data.musicInfos.musicName,authorName: data.musicInfos.authorName,userName: data.authorInfos.uniqueId,),ActionsToolbar(comments: data.itemInfos.commentCount.toString(),userImg: data.authorInfos.covers[0],favorite: data.itemInfos.diggCount,coverImg: data.musicInfos.covers[0],),],),);}Widget title() => Align(alignment: Alignment.topCenter,child: Padding(padding: EdgeInsets.symmetric(vertical: 28.0),child: Text("Trending | For You",style: TextStyle(color: Colors.white, fontSize: 19.0),),),);
}

此次开发主要时间用在搭建Flutter环境上，切记使用国内镜像，另外调式需要配合代理即可。

其他待完成的包含底部的导航页面，打算花两天时间把剩余的完成.

各位感兴趣的可以到我的github上点一下star. 留言可以教你们开发以及搭建dart环境. 地址:https://github.com/WangCharlie/douyin

作者blog:https://www.cnblogs.com/fengqingyangNo1/p/12927538.html

相关阅读:

后端，你再不懂vue就out了

GitHub 上值得收藏的100个精选前端项目！

字节跳动今日头条前端面经（4轮技术面+hr面）

从P4到P9，在马云家写代码到双11前端PM

来自腾讯CDC团队的前端异常监控解决方案～

加入启明星技术社群，与大佬面对面: