Flutter高仿抖音,源码开源 [附教程]

Posted 2021-04-29 前端巅峰

提示:

• APP下载地址和源码地址都在文末
• 我会不定期更新优质的开源项目推荐给大家，觉得公众号不错可以关注下

作者,gitHub账号:mjl0602开源 大家记得给个Star

最终效果

准备环境

• Mac电脑 20G左右空间（xCode+Flutter SDK等）
• 由于在国内访问Flutter有时可能会受到限制，Flutter官方为中国开发者搭建了临时镜像，大家可以将如下环境变量加入到用户环境变量中：

export PUB_HOSTED_URL=https://pub.flutter-io.cn
export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn

• 下载SDK 下载SDK
• 然后依次执行一下命令

cd Desktop/

mkdir development

cd development

unzip  ~/Downloads/flutter_macos_1.17.1-stable.zip

• 然后添加Flutter工具到path中

export PATH=`pwd`/flutter/bin:$PATH

• 运行 flutter doctor
• 运行以下命令查看是否需要安装其它依赖项来完成安装：(这里请你一定要记住+sudo)

sudo flutter doctor

• 这个命令执行后需要等待一段时间,请你千万不要停止，虽然它有锁,但是不要那样做
• 如果执行后没有反应，请你用活动监视器杀掉git进程，然后就开启翻墙，这样就好了

更新环境变量

export PUB_HOSTED_URL=https://pub.flutter-io.cn //国内用户需要设置
export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn //国内用户需要设置
export PATH=PATH_TO_FLUTTER_GIT_DIRECTORY/flutter/bin:$PATH

• 注意：PATH_TO_FLUTTER_GIT_DIRECTORY 为你flutter的路径，比如“~/document/code”,我的安装目录是 ~/Desktop/development

 export PATH=~/document/code/flutter/bin:$PATH

特别提示: xCode版本过高，voip的ios唤醒是会有问题的,建议安装低版本的Flutter sdk.

• 更多的环境问题参考:Flutter环境搭建

启动模拟器

open -a Simulator

启动应用

flutter run

项目大致讲解

• 入口文件 lib/main.dart

  /// 自定义报错页面
  if (kReleaseMode) {
    ErrorWidget.builder = (FlutterErrorDetails flutterErrorDetails) {
      debugPrint(flutterErrorDetails.toString());
      return Material(
        child: Center(
            child: Text(
          "发生了没有处理的错误\n请通知开发者",
          textAlign: TextAlign.center,
        )),
      );
    };
  }
  runApp(MyApp());
}

• 入门文件加载启动 APP

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Tiktok',
      theme: ThemeData(
        brightness: Brightness.dark,
        hintColor: Colors.white,
        accentColor: Colors.white,
        primaryColor: ColorPlate.orange,
        primaryColorBrightness: Brightness.dark,
        scaffoldBackgroundColor: ColorPlate.back1,
        dialogBackgroundColor: ColorPlate.back2,
        accentColorBrightness: Brightness.light,
        textTheme: TextTheme(
          bodyText1: StandardTextStyle.normal,
        ),
      ),
      home: HomePage(),
    );
  }
}

• 顶部引入 homePage

import 'package:flutter_tiktok/pages/homePage.dart';

• homepage.dart：

import 'package:flutter_tiktok/pages/cameraPage.dart';
import 'package:flutter_tiktok/pages/followPage.dart';
import 'package:flutter_tiktok/pages/searchPage.dart';
import 'package:flutter_tiktok/pages/userPage.dart';
import 'package:flutter_tiktok/views/tikTokCommentBottomSheet.dart';
import 'package:flutter_tiktok/views/tikTokHeader.dart';
import 'package:flutter_tiktok/views/tikTokScaffold.dart';
import 'package:flutter_tiktok/views/tikTokVideo.dart';
import 'package:flutter_tiktok/views/tikTokVideoButtonColumn.dart';
import 'package:flutter_tiktok/views/tikTokVideoPlayer.dart';
import 'package:flutter_tiktok/views/tiktokTabBar.dart';
import 'package:fijkplayer/fijkplayer.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:safemap/safemap.dart';

import 'msgPage.dart';

/// 单独修改了bottomSheet组件的高度
import 'package:flutter_tiktok/other/bottomSheet.dart' as CustomBottomSheet;

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> with WidgetsBindingObserver {
  TikTokPageTag tabBarType = TikTokPageTag.home;

  TikTokScaffoldController tkController = TikTokScaffoldController();

  PageController _pageController = PageController();

  VideoListController _videoListController = VideoListController();

  /// 记录点赞
  Map<int, bool> favoriteMap = {};

  List<UserVideo> videoDataList = [];

  @override
  void didChangeAppLifecycleState(AppLifecycleState state) async {
    if (state != AppLifecycleState.resumed) {
      _videoListController.currentPlayer.pause();
    }
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);
    _videoListController.currentPlayer.pause();
    super.dispose();
  }

  @override
  void initState() {
    videoDataList = UserVideo.fetchVideo();
    WidgetsBinding.instance.addObserver(this);
    _videoListController.init(
      _pageController,
      videoDataList,
    );
    tkController.addListener(
      () {
        if (tkController.value == TikTokPagePositon.middle) {
          _videoListController.currentPlayer.start();
        } else {
          _videoListController.currentPlayer.pause();
        }
      },
    );

    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    Widget currentPage;

    switch (tabBarType) {
      case TikTokPageTag.home:
        break;
      case TikTokPageTag.follow:
        currentPage = FollowPage();
        break;
      case TikTokPageTag.msg:
        currentPage = MsgPage();
        break;
      case TikTokPageTag.me:
        currentPage = UserPageSwitchPage(isSelfPage: true);
        break;
    }
    double a = MediaQuery.of(context).size.aspectRatio;
    bool hasBottomPadding = a < 0.55;

    bool hasBackground = hasBottomPadding;
    hasBackground = tabBarType != TikTokPageTag.home;
    if (hasBottomPadding) {
      hasBackground = true;
    }
    Widget tikTokTabBar = TikTokTabBar(
      hasBackground: hasBackground,
      current: tabBarType,
      onTabSwitch: (type) async {
        setState(() {
          tabBarType = type;
          if (type == TikTokPageTag.home) {
            _videoListController.currentPlayer.start();
          } else {
            _videoListController.currentPlayer.pause();
          }
        });
      },
      onAddButton: () {
        Navigator.of(context).push(
          MaterialPageRoute(
            fullscreenDialog: true,
            builder: (context) => CameraPage(),
          ),
        );
      },
    );

    var userPage = UserPageSwitchPage(
      isSelfPage: false,
      canPop: true,
      onPop: () {
        tkController.animateToMiddle();
      },
    );
    var searchPage = SearchPage(
      onPop: tkController.animateToMiddle,
    );
    var header = tabBarType == TikTokPageTag.home
        ? TikTokHeader(
            onSearch: () {
              tkController.animateToLeft();
            },
          )
        : Container();

    // 组合
    return TikTokScaffold(
      controller: tkController,
      hasBottomPadding: hasBackground,
      tabBar: tikTokTabBar,
      header: header,
      leftPage: searchPage,
      rightPage: userPage,
      enableGesture: tabBarType == TikTokPageTag.home,
      // onPullDownRefresh: _fetchData,
      page: Stack(
        // index: currentPage == null ? 0 : 1,
        children: <Widget>[
          PageView.builder(
            key: Key('home'),
            controller: _pageController,
            pageSnapping: true,
            physics: ClampingScrollPhysics(),
            scrollDirection: Axis.vertical,
            itemCount: _videoListController.videoCount,
            itemBuilder: (context, i) {
              // 拼一个视频组件出来
              var data = videoDataList[i];
              bool isF = SafeMap(favoriteMap)[i].boolean ?? false;
              var player = _videoListController.playerOfIndex(i);
              // 右侧按钮列
              Widget buttons = TikTokButtonColumn(
                isFavorite: isF,
                onAvatar: () {
                  tkController.animateToPage(TikTokPagePositon.right);
                },
                onFavorite: () {
                  setState(() {
                    favoriteMap[i] = !isF;
                  });
                  // showAboutDialog(context: context);
                },
                onComment: () {
                  CustomBottomSheet.showModalBottomSheet(
                    backgroundColor: Colors.white.withOpacity(0),
                    context: context,
                    builder: (BuildContext context) =>
                        TikTokCommentBottomSheet(),
                  );
                },
                onShare: () {},
              );
              // video
              Widget currentVideo = Center(
                child: FijkView(
                  player: player,
                  color: Colors.black,
                  panelBuilder: (_, __, ___, ____, _____) => Container(),
                ),
              );

              currentVideo = TikTokVideoPage(
                hidePauseIcon: player.state != FijkState.paused,
                aspectRatio: 9 / 16.0,
                key: Key(data.url + '$i'),
                tag: data.url,
                bottomPadding: hasBottomPadding ? 16.0 : 16.0,
                userInfoWidget: VideoUserInfo(
                  desc: data.desc,
                  bottomPadding: hasBottomPadding ? 16.0 : 50.0,
                  // onGoodGift: () => showDialog(
                  //   context: context,
                  //   builder: (_) => FreeGiftDialog(),
                  // ),
                ),
                onSingleTap: () async {
                  if (player.state == FijkState.started) {
                    await player.pause();
                  } else {
                    await player.start();
                  }
                  setState(() {});
                },
                onAddFavorite: () {
                  setState(() {
                    favoriteMap[i] = true;
                  });
                },
                rightButtonColumn: buttons,
                video: currentVideo,
              );
              return currentVideo;
            },
          ),
          Opacity(
            opacity: 1,
            child: currentPage ?? Container(),
          ),
          // Center(
          //   child: Text(_currentIndex.toString()),
          // )
        ],
      ),
    );
  }
}

实现的功能

• 上下刷视频，视频会自动加载封面
• 左右滑动去搜索与个人中心
• 双击爱心点赞
• 看评论
• 切换底部Tabbar

应用截图

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