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。
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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: flutter
  flutter_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: ^0.1.3
  cached_network_image: ^2.2.0
  json_annotation: ^3.0.1
  font_awesome_flutter: ^8.8.1
  http: ^0.12.0+4
  provider: ^4.0.4
  avatar_glow: any
  getflutter: ^1.0.11
  flutter_money_formatter: ^0.8.3
  video_player: ^0.10.8+1
  dio: ^3.0.9
  dio_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 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 json) {
    statueCode = json['statusCode'];
    body = json['body'] != null ? new Body.fromJson(json['body']) : null;
    errMsg = json['errMsg'];
  }
 
  Map toJson() {
    final Map data = new Map();
    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 {
  @override
  HomeState createState() => HomeState();
}
 
class HomeState extends State {
  int currentIndex = 0;
  PageController pageController;
 
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: PageView(
        controller: pageController,
        children: [
          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 {
  PageController pageController;
  BuildContext context;
  RequestController api = RequestController();
  List 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);
    }
  }
 
  @override
  void initState() {
    super.initState();
    getTrending();
  }
 
  @override
  Widget build(BuildContext context) {
    context = context;
    return PageView(
      scrollDirection: Axis.vertical,
      controller: pageController,
      children: videos.length == 0
          ? [
              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});
 
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Stack(
        children: [
          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

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