使用Flutter開發(fā)的抖音國際版實例代碼詳解

更新時間：2020年05月21日 14:12:33 作者：風(fēng)清揚 No.1

這篇文章主要介紹了使用Flutter開發(fā)的抖音國際版，本文通過實例代碼給大家介紹的非常詳細，對大家的學(xué)習(xí)或工作具有一定的參考借鑒價值,需要的朋友可以參考下

簡介

最近花了兩天時間研究使用Flutter開發(fā)一個抖音國際版. 個人感覺使用Flutter開發(fā)app快得不要不要的額. 兩天就基本可以開發(fā)個大概出來. 最主要是熱重載，太方便實時調(diào)整UI布局了. 相應(yīng)速度極快. 如下圖：

主要項目架構(gòu)

詳細說明一下，開發(fā)主要在lib文件夾

pubspec.yaml是配置插件的位置，如http: ^0.12.0+4，類似依賴組件.
common文件夾存放的是重寫的網(wǎng)絡(luò)組件，以及圖標組件icons.dart
config文件夾存放的api.dart，wei調(diào)用的api配置文件
models文件存放的實體層
screen文件夾存放的頁面view層
tabs存放的底部切換文件夾層
widgets存放的組件，包含視頻播放組件player.dart以及左右等描述組件

功能介紹

主要的依賴組件，請使用國內(nèi)鏡像下載，切記切記?。。?！

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

包含字體文件，主要為抖音自帶的字體文件

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開發(fā)安卓、IOS等 app確實方便，主要為將tiktok的數(shù)據(jù)使用http下載下來.

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層

主要為實體層，解析json后綁定數(shù)據(jù)以及傳遞數(shù)據(jù)

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;
 }
}

視圖層

另外屏幕層主要包含三個，homescreen，trendingscreen，以及顯示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<Home> {
 int currentIndex = 0;
 PageController pageController;
 
 @override
 Widget build(BuildContext context) {
  return Scaffold(
   body: PageView(
    controller: pageController,
    children: <Widget>[
     Trending(),
    ],
    onPageChanged: (int index) {
     setState(() {
      currentIndex = index;
     });
    },
   ),
   bottomNavigationBar: bottomItems(currentIndex, pageController),
  );
 }
}

Tending層，主要包含讀取抖音的api，將api轉(zhuǎn)化成實體對象，綁定數(shù)據(jù)到videoscreen頁面

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);
  }
 }
 @override
 void initState() {
  super.initState();
  getTrending();
 }
 @override
 Widget 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主要為綁定數(shù)據(jù). 展示抖音的視頻

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: <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),
     ),
    ),
   );
}

此次開發(fā)主要時間用在搭建Flutter環(huán)境上，切記使用國內(nèi)鏡像，另外調(diào)式需要配合代理即可。

其他待完成的包含底部的導(dǎo)航頁面，打算花兩天時間把剩余的完成.