README.md

@@ -2,12 +2,32 @@
 
 哟慕课 APP 是一个第三方的优慕课客户端
 
+![screenshot](./screenshot.jpg)
+
 ## 🎞 背景
 
 无论是电脑版还是手机版的优慕课客户端用起来似乎都不是那么令人满意，电脑版在课程页面只能看到标题不能看到详情，手机版从详情页退出后会回到最顶端。于是就有了做一个第三方客户端的想法，也当是 React Native 的一次练手了
 
+## 🧨 版本说明
+
+| 版本   | 说明         |
+| ------ | ------------ |
+| 0.0.1a | 首个可用版本 |
+
+
+
 ## 📄 TODO
 
 - [ ] 弹出键盘不遮挡输入框
 - [ ] 根据像素比例设置登录背景图片大小
 - [ ] 添加应用图标
+- [ ] 适配 iOS 登录失败 toast
+- [ ] 在启动时检测是否已登录
+- [ ] Splash 检测网络出错后在 Splash UI 中显示错误并不跳转
+- [ ] Forum 初始化失败后 UI 显示错误信息
+- [ ] 当数据获取完成后通过动画转到话题列表
+- [ ] 解决当动画进行时点击话题标题动画会被打断的问题
+- [ ] 支持显示回复图片
+- [ ] 在回复中显示头像
+- [ ] 当滑动到页面底部时显示"加载更多"
+

android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,28 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+  package="com.yoomoocrn">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+
+    <application
+      android:name=".MainApplication"
+      android:label="@string/app_name"
+      android:icon="@mipmap/ic_launcher"
+      android:roundIcon="@mipmap/ic_launcher_round"
+      android:allowBackup="false"
+      android:theme="@style/AppTheme">
+      <activity
+        android:name=".MainActivity"
+        android:label="@string/app_name"
+        android:screenOrientation="portrait"
+        android:configChanges="keyboard|keyboardHidden|orientation|screenSize|uiMode"
+        android:launchMode="singleTask"
+        android:windowSoftInputMode="adjustResize">
+        <intent-filter>
+            <action android:name="android.intent.action.MAIN" />
+            <category android:name="android.intent.category.LAUNCHER" />
+        </intent-filter>
+      </activity>
+      <activity android:name="com.facebook.react.devsupport.DevSettingsActivity" />
+    </application>
+
+</manifest>

package.json

@@ -0,0 +1,34 @@
+{
+  "name": "YoomoocRN",
+  "version": "0.0.1",
+  "private": true,
+  "scripts": {
+    "android": "react-native run-android",
+    "ios": "react-native run-ios",
+    "start": "react-native start",
+    "test": "jest",
+    "lint": "eslint ."
+  },
+  "dependencies": {
+    "@react-native-async-storage/async-storage": "^1.13.2",
+    "@react-native-community/cookies": "^5.0.1",
+    "buffer": "^6.0.3",
+    "iconv-lite": "^0.6.2",
+    "react": "16.13.1",
+    "react-native": "0.63.3",
+    "stream": "^0.0.2"
+  },
+  "devDependencies": {
+    "@babel/core": "^7.12.9",
+    "@babel/runtime": "^7.12.5",
+    "@react-native-community/eslint-config": "^2.0.0",
+    "babel-jest": "^26.6.3",
+    "eslint": "^7.14.0",
+    "jest": "^26.6.3",
+    "metro-react-native-babel-preset": "^0.64.0",
+    "react-test-renderer": "16.13.1"
+  },
+  "jest": {
+    "preset": "react-native"
+  }
+}

src/App.js

@@ -1,14 +1,14 @@
 import React from 'react';
-import {StyleSheet, View} from 'react-native';
+import {StyleSheet, View, Platform} from 'react-native';
 import {StatusBarHeight} from './api/StatusBarHeight';
-import YooLogin from './component/YooLogin';
-import {YooBackground} from './ui/YooBackground';
+import {YooBackground} from './component/index';
+import YooRouter from './YooRouter';
 
 const styles = StyleSheet.create({
   container: {
     margin: 0,
     padding: 0,
-    paddingTop: StatusBarHeight,
+    paddingTop: Platform.OS === 'ios' ? StatusBarHeight : 0,
   },
 });
 
@@ -16,7 +16,7 @@ export default function App() {
   return (
     <View style={styles.container}>
       <YooBackground />
-      <YooLogin />
+      <YooRouter />
     </View>
   );
 }

src/YooRouter.js

@@ -0,0 +1,88 @@
+import React, {Component} from 'react';
+import {View, Animated, Dimensions} from 'react-native';
+import {YooLogin, YooForum, YooSplash} from './component/index';
+
+const width = Dimensions.get('window').width;
+
+export default class YooRouter extends Component {
+  constructor(props) {
+    super(props);
+    this.state = {
+      currentPage: 'splash',
+      splashX: new Animated.Value(0),
+      loginX: new Animated.Value(width),
+      forumX: new Animated.Value(width),
+    };
+    this.gotoForum = this.gotoForum.bind(this);
+    this.gotoLogin = this.gotoLogin.bind(this);
+    this.bindForumInitializer = this.bindForumInitializer.bind(this);
+    this.initForum = null;
+  }
+
+  bindForumInitializer(forumRef) {
+    this.initForum = forumRef.initForum;
+  }
+
+  gotoLogin() {
+    this.setState({currentPage: 'login'});
+    Animated.parallel([
+      Animated.timing(this.state.splashX, {
+        toValue: -width,
+        duration: 250,
+        useNativeDriver: false,
+      }),
+      Animated.timing(this.state.loginX, {
+        toValue: 0,
+        duration: 250,
+        useNativeDriver: false,
+      }),
+    ]).start();
+  }
+
+  gotoForum() {
+    this.initForum();
+    if (this.state.currentPage === 'splash') {
+      Animated.parallel([
+        Animated.timing(this.state.splashX, {
+          toValue: -width,
+          duration: 250,
+          useNativeDriver: false,
+        }),
+        Animated.timing(this.state.forumX, {
+          toValue: 0,
+          duration: 250,
+          useNativeDriver: false,
+        }),
+      ]).start();
+    } else {
+      Animated.parallel([
+        Animated.timing(this.state.loginX, {
+          toValue: -width,
+          duration: 250,
+          useNativeDriver: false,
+        }),
+        Animated.timing(this.state.forumX, {
+          toValue: 0,
+          duration: 250,
+          useNativeDriver: false,
+        }),
+      ]).start();
+    }
+  }
+
+  render() {
+    return (
+      <View>
+        <Animated.View style={{left: this.state.splashX}}>
+          <YooSplash gotoLogin={this.gotoLogin} gotoForum={this.gotoForum} />
+        </Animated.View>
+        <Animated.View style={{left: this.state.loginX}}>
+          <YooLogin gotoForum={this.gotoForum} />
+        </Animated.View>
+        <Animated.View style={{left: this.state.forumX}}>
+          <YooForum bindInitializer={this.bindForumInitializer} />
+        </Animated.View>
+      </View>
+    );
+  }
+}

src/api/HTTP.js

@@ -0,0 +1,26 @@
+import iconv from 'iconv-lite';
+import {Buffer} from 'buffer';
+
+function gbkFetch(method, url, data) {
+  return new Promise(function (resolve, reject) {
+    const request = new XMLHttpRequest();
+
+    request.onload = () => {
+      if (request.status === 200) {
+        resolve(iconv.decode(Buffer.from(request.response), 'gbk'));
+      } else {
+        reject(new Error(request.statusText));
+      }
+    };
+    request.onerror = () => reject(new Error(request.statusText));
+    request.responseType = 'arraybuffer';
+
+    request.open(method, url);
+    for (let headerKey in data.headers) {
+      request.setRequestHeader(headerKey, data.headers[headerKey]);
+    }
+    request.send(data.body);
+  });
+}
+
+export {gbkFetch};

src/api/StatusBarHeight.js

@@ -0,0 +1,21 @@
+import {Dimensions, Platform, StatusBar} from 'react-native';
+
+const X_WIDTH = 375;
+const X_HEIGHT = 812;
+
+const XSMAX_WIDTH = 414;
+const XSMAX_HEIGHT = 896;
+
+const {height, width} = Dimensions.get('window');
+
+export const isIPhoneX = () =>
+  Platform.OS === 'ios' && !Platform.isPad && !Platform.isTVOS
+    ? (width === X_WIDTH && height === X_HEIGHT) ||
+      (width === XSMAX_WIDTH && height === XSMAX_HEIGHT)
+    : false;
+
+export const StatusBarHeight = Platform.select({
+  ios: isIPhoneX() ? 44 : 20,
+  android: StatusBar.currentHeight,
+  default: 0,
+});

src/component/YooForum.js

@@ -0,0 +1,138 @@
+import React, {Component} from 'react';
+import {ToastAndroid} from 'react-native';
+import YooForumUI from '../ui/YooForumUI';
+import {gbkFetch} from '../api/HTTP';
+import CookieManager from '@react-native-community/cookies';
+import * as cheerio from 'cheerio';
+
+const ShowErrorToast = () =>
+  ToastAndroid.show('获取数据时出错', ToastAndroid.SHORT);
+
+export default class YooForum extends Component {
+  constructor(props) {
+    super(props);
+    this.state = {
+      hint: '准备中',
+      topics: [],
+    };
+    this.initForum = this.initForum.bind(this);
+    this.getTopicList = this.getTopicList.bind(this);
+  }
+
+  componentDidMount() {
+    this.props.bindInitializer(this);
+  }
+
+  initForum() {
+    // get dwr session id
+    gbkFetch(
+      'POST',
+      'http://eol.ctbu.edu.cn/meol/dwr/call/plaincall/__System.generateId.dwr',
+      {
+        headers: {
+          Origin: 'http://eol.ctbu.edu.cn',
+          'Content-Type': 'text/plain',
+          'User-Agent': 'YooMooc',
+          Referer:
+            'http://eol.ctbu.edu.cn/meol/jpk/course/layout/newpage/index.jsp?courseId=46445',
+          'Accept-Language': 'zh-CN,zh;q=0.9,en;q=0.8,en-US;q=0.7',
+        },
+        body:
+          'callCount=1\n' +
+          'c0-scriptName=__System\n' +
+          'c0-methodName=generateId\n' +
+          'c0-id=0\n' +
+          'batchId=0\n' +
+          'instanceId=0\n' +
+          'page=%2Fmeol%2Fjpk%2Fcourse%2Flayout%2Fnewpage%2Findex.jsp%3FcourseId%3D46445\n' +
+          'scriptSessionId=\n' +
+          'windowName=\n',
+      },
+    )
+      .then((response) => {
+        if (/[^"]*"\);/.test(response)) {
+          const exDate = new Date();
+          exDate.setDate(exDate.getDate() + 1);
+          CookieManager.set(
+            'http://eol.ctbu.edu.cn/meol/jpk/course/layout/newpage/index.jsp?courseId=46445',
+            {
+              name: 'DWRSESSIONID',
+              value: response.match(/[^"]*"\);/)[0].split('"')[0],
+              domain: 'eol.ctbu.edu.cn',
+              path: '/meol',
+              version: '1',
+              expires: exDate.toUTCString(),
+            },
+          ).then(() => {
+            // it is needed to request some pages before getting the topic list
+            // maybe the server is judging which course the user is
+            gbkFetch(
+              'GET',
+              'http://eol.ctbu.edu.cn/meol/jpk/course/layout/newpage/index.jsp?courseId=46445',
+              {
+                headers: {
+                  'Upgrade-Insecure-Requests': '1',
+                  'User-Agent': 'YooMooc',
+                },
+              },
+            )
+              .then(() => {
+                gbkFetch(
+                  'GET',
+                  'http://eol.ctbu.edu.cn/meol/jpk/course/layout/newpage/default_demonstrate.jsp',
+                  {
+                    'Upgrade-Insecure-Requests': '1',
+                    'User-Agent': 'YooMooc',
+                    Referer:
+                      'http://eol.ctbu.edu.cn/meol/jpk/course/layout/newpage/index.jsp?courseId=46445',
+                  },
+                )
+                  .then(() => {
+                    this.getTopicList();
+                  })
+                  .catch(ShowErrorToast);
+              })
+              .catch(ShowErrorToast);
+          });
+        } else {
+          ShowErrorToast();
+        }
+      })
+      .catch(ShowErrorToast);
+  }
+
+  getTopicList(page = 1) {
+    this.setState({hint: '获取数据中'});
+    gbkFetch(
+      'GET',
+      `http://eol.ctbu.edu.cn/meol/common/faq/forum.jsp?viewtype=thread&forumid=102211&cateId=0&s_gotopage=${page}`,
+      {
+        headers: {
+          'Upgrade-Insecure-Requests': '1',
+          'User-Agent': 'YooMooc',
+          Referer:
+            'http://eol.ctbu.edu.cn/meol/common/faq/forum.jsp?count=MODITIME&forumid=102211',
+        },
+      },
+    ).then((response) => {
+      const newTopics = [];
+      const appendNewTopic = (threadID, title, owner) => {
+        newTopics.push({threadID, title, owner});
+      };
+      const $ = cheerio.load(response, {ignoreWhitespace: true});
+      $('td.left').each(function () {
+        const current = $(this);
+        appendNewTopic(
+          current.children('a').attr('href').slice(20),
+          current.text(),
+          current.next().text(),
+        );
+      });
+      this.setState({topics: [...this.state.topics, ...newTopics], hint: ''});
+    });
+  }
+
+  render() {
+    return <YooForumUI topics={this.state.topics} hint={this.state.hint} />;
+  }
+}

src/component/YooForumTopic.js

@@ -0,0 +1,56 @@
+import React, {Component} from 'react';
+import YooForumTopicUI from '../ui/YooForumTopicUI';
+import {gbkFetch} from '../api/HTTP';
+import * as cheerio from 'cheerio';
+
+export default class YooForumTopic extends Component {
+  constructor(props) {
+    super(props);
+    this.state = {
+      replies: [],
+    };
+    this.getReplies = this.getReplies.bind(this);
+  }
+
+  componentDidMount() {
+    this.getReplies();
+  }
+
+  getReplies() {
+    gbkFetch(
+      'GET',
+      `http://eol.ctbu.edu.cn/meol/common/faq/thread.jsp?threadid=${this.props.topic.threadID}`,
+      {
+        headers: 'YooMooc',
+      },
+    ).then((response) => {
+      const newReplies = [];
+      const appendReply = (username, content) => {
+        newReplies.push({username, content});
+      };
+      const $ = cheerio.load(response, {ignoreWhitespace: true});
+      $('input[type=hidden]').each(function () {
+        const current = $(this);
+        const currentUserInfo = current.parent().parent().parent().parent();
+        if (currentUserInfo.html().slice(2, 4) === 'td') {
+          appendReply(
+            currentUserInfo.find('h6').text().split(' ')[1],
+            cheerio.load(current.attr('value')).text(),
+          );
+        }
+      });
+      this.setState({replies: [...this.state.replies, ...newReplies]});
+    });
+  }
+
+  render() {
+    return (
+      <YooForumTopicUI
+        topic={this.props.topic}
+        showDetail={this.props.showDetail}
+        hideDetail={this.props.hideDetail}
+        replies={this.state.replies}
+      />
+    );
+  }
+}

src/component/YooLogin.js

@@ -1,12 +1,69 @@
 import React, {Component} from 'react';
 import YooLoginUI from '../ui/YooLoginUI';
+import CookieManager from '@react-native-community/cookies';
+import {gbkFetch} from '../api/HTTP';
 
 export default class YooLogin extends Component {
   constructor(props) {
     super(props);
+    this.state = {
+      username: '',
+      password: '',
+    };
+    this.setUsername = this.setUsername.bind(this);
+    this.setPassword = this.setPassword.bind(this);
+    this.login = this.login.bind(this);
+  }
+
+  setUsername(value) {
+    this.setState({username: value});
+  }
+
+  setPassword(value) {
+    this.setState({password: value});
+  }
+
+  login(onFail) {
+    gbkFetch('POST', 'http://eol.ctbu.edu.cn/meol/loginCheck.do', {
+      headers: {
+        'Cache-Control': 'max-age=0',
+        'Upgrade-Insecure-Requests': '1',
+        Origin: 'http://eol.ctbu.edu.cn',
+        'Content-Type': 'application/x-www-form-urlencoded',
+        'User-Agent': 'YooMooc',
+        Referer:
+          'http://eol.ctbu.edu.cn/meol/common/security/login.jsp?enterLid=46445',
+        'Accept-Language': 'zh-CN,zh;q=0.9,en;q=0.8,en-US;q=0.7',
+      },
+      body:
+        'logintoken=' +
+        new Date().getTime() +
+        '&enterLid=46445' +
+        '&IPT_LOGINUSERNAME=' +
+        this.state.username +
+        '&IPT_LOGINPASSWORD=' +
+        this.state.password,
+    })
+      .then((response) => {
+        if (/<title>(.|\n)*用户登录(.|\n)*<\/title>/.test(response)) {
+          onFail('用户名或密码错误');
+          CookieManager.clearAll();
+        } else if (/<title>(.|\n)*网络课程(.|\n)*<\/title>/.test(response)) {
+          this.props.gotoForum();
+        }
+      })
+      .catch(() => onFail('登陆失败'));
   }
 
   render() {
-    return <YooLoginUI />;
+    return (
+      <YooLoginUI
+        username={this.state.username}
+        password={this.state.password}
+        setUsername={this.setUsername}
+        setPassword={this.setPassword}
+        loginCallback={this.login}
+      />
+    );
   }
 }

src/component/YooSplash.js

@@ -0,0 +1,35 @@
+import React, {Component} from 'react';
+import {ToastAndroid} from 'react-native';
+import YooSplashUI from '../ui/YooSplashUI';
+import {gbkFetch} from '../api/HTTP';
+import CookieManager from '@react-native-community/cookies';
+
+export default class YooSplash extends Component {
+  componentDidMount() {
+    gbkFetch('POST', 'http://eol.ctbu.edu.cn/meol/loginCheck.do', {
+      headers: {
+        'Cache-Control': 'max-age=0',
+        'Upgrade-Insecure-Requests': '1',
+        Origin: 'http://eol.ctbu.edu.cn',
+        'Content-Type': 'application/x-www-form-urlencoded',
+        'User-Agent': 'YooMooc',
+        Referer:
+          'http://eol.ctbu.edu.cn/meol/common/security/login.jsp?enterLid=46445',
+        'Accept-Language': 'zh-CN,zh;q=0.9,en;q=0.8,en-US;q=0.7',
+      },
+    })
+      .then((response) => {
+        if (/<title>(.|\n)*用户登录(.|\n)*<\/title>/.test(response)) {
+          this.props.gotoLogin();
+          CookieManager.clearAll();
+        } else if (/<title>(.|\n)*网络课程(.|\n)*<\/title>/.test(response)) {
+          this.props.gotoForum();
+        }
+      })
+      .catch(() => ToastAndroid.show('无法连接到服务器', ToastAndroid.SHORT));
+  }
+
+  render() {
+    return <YooSplashUI />;
+  }
+}

src/component/index.js

@@ -0,0 +1,6 @@
+import YooLogin from './YooLogin';
+import YooForum from './YooForum';
+import YooBackground from '../ui/YooBackground';
+import YooSplash from './YooSplash';
+
+export {YooLogin, YooForum, YooBackground, YooSplash};

src/ui/YooBackground.js

@@ -1,20 +1,34 @@
-import React from 'react';
-import {View, Image, StyleSheet} from 'react-native';
+import React, {useState} from 'react';
+import {Image, StyleSheet, Animated} from 'react-native';
 
-export function YooBackground() {
+export default function YooBackground() {
+  const imgPosition = useState(new Animated.ValueXY())[0];
   const styles = StyleSheet.create({
     backgroundContainer: {
-      width: '100%',
-      height: '100%',
+      transform: [{translateX: -1500}],
       position: 'absolute',
       zIndex: -1,
     },
   });
+  setInterval(() => {
+    Animated.timing(imgPosition, {
+      toValue: {
+        x: -Math.floor(Math.random() * 5000),
+        y: -Math.floor(Math.random() * 3000),
+      },
+      duration: 10000,
+      useNativeDriver: true,
+    }).start();
+  }, 10000);
   return (
-    <View style={styles.backgroundContainer}>
+    <Animated.View
+      style={[
+        styles.backgroundContainer,
+        {transform: imgPosition.getTranslateTransform()},
+      ]}>
       <Image
         source={require('../../assets/pawel-czerwinski-aelD0Zrmsy0-unsplash.jpg')}
       />
-    </View>
+    </Animated.View>
   );
 }

src/ui/YooForumTopicUI.js

@@ -0,0 +1,77 @@
+import React, {Component, createRef} from 'react';
+import {
+  Animated,
+  View,
+  Text,
+  StyleSheet,
+  Pressable,
+  Dimensions,
+} from 'react-native';
+
+const screenWidth = Dimensions.get('window').width;
+const styles = StyleSheet.create({
+  container: {
+    backgroundColor: 'mintcream',
+    borderRadius: 8,
+    padding: 16,
+    margin: 8,
+    width: screenWidth - 16,
+  },
+  title: {
+    fontSize: 24,
+  },
+  owner: {
+    fontSize: 16,
+  },
+});
+const AnimatedPressable = Animated.createAnimatedComponent(Pressable);
+
+export default class YooForumTopicUI extends Component {
+  constructor(props) {
+    super(props);
+    this.state = {
+      detailShowing: false,
+      layoutY: 0,
+      translate: new Animated.ValueXY({x: 0, y: 0}),
+    };
+    this.topicHeaderRef = createRef();
+    this.onPress = this.onPress.bind(this);
+    this.onAnimationFinished = this.onAnimationFinished.bind(this);
+  }
+
+  onAnimationFinished() {
+    this.setState({detailShowing: !this.state.detailShowing});
+  }
+
+  onPress() {
+    if (!this.state.detailShowing) {
+      this.props.showDetail(
+        this.state.translate,
+        this.state.layoutY,
+        this.onAnimationFinished,
+        this.props.replies,
+      );
+    } else {
+      this.props.hideDetail(this.state.translate, this.onAnimationFinished);
+    }
+  }
+
+  render() {
+    return (
+      <AnimatedPressable
+        style={[
+          styles.container,
+          {transform: this.state.translate.getTranslateTransform()},
+        ]}
+        onPress={this.onPress}
+        onLayout={(event) => {
+          this.setState({layoutY: event.nativeEvent.layout.y});
+        }}>
+        <View ref={this.topicHeaderRef}>
+          <Text style={styles.owner}>{this.props.topic.owner}</Text>
+          <Text style={styles.title}>{this.props.topic.title}</Text>
+        </View>
+      </AnimatedPressable>
+    );
+  }
+}

src/ui/YooForumUI.js

@@ -0,0 +1,172 @@
+import React, {Component, createRef} from 'react';
+import {
+  View,
+  ScrollView,
+  Text,
+  StyleSheet,
+  ActivityIndicator,
+  Image,
+  Animated,
+  Dimensions,
+} from 'react-native';
+import YooForumTopic from '../component/YooForumTopic';
+import YooReply from './YooReply';
+
+const screenWidth = Dimensions.get('window').width;
+const screenHeight = Dimensions.get('window').height;
+const AnimatedScrollView = Animated.createAnimatedComponent(ScrollView);
+const styles = StyleSheet.create({
+  container: {
+    width: screenWidth * 2,
+  },
+  repliesContainer: {
+    position: 'absolute',
+    left: screenWidth,
+    width: screenWidth,
+    height: screenHeight - 124,
+  },
+  hintContainer: {
+    flex: 1,
+    alignItems: 'center',
+    left: -screenWidth / 2,
+  },
+  logo: {
+    marginTop: 120,
+    width: 200,
+    height: 200,
+    marginBottom: 16,
+  },
+  hint: {
+    fontSize: 24,
+    fontWeight: 'bold',
+  },
+  indicator: {
+    marginTop: 64,
+  },
+});
+
+export default class YooForumUI extends Component {
+  constructor(props) {
+    super(props);
+    this.state = {
+      scrollEnabled: true,
+      currentPosition: 0,
+      translateX: new Animated.Value(0),
+      currentReplies: [],
+      replyTranslateY: new Animated.Value(0),
+    };
+    this.replyRef = createRef();
+    this.showDetail = this.showDetail.bind(this);
+    this.hideDetail = this.hideDetail.bind(this);
+  }
+
+  showDetail(translate, layoutY, onAnimationFinished, replies) {
+    this.replyRef.current.scrollTo({x: 0, y: 0, animated: false});
+    this.setState({
+      scrollEnabled: false,
+      currentReplies: replies,
+    });
+    this.state.replyTranslateY.setValue(
+      this.state.currentPosition + 100 + screenHeight,
+    );
+    Animated.parallel([
+      Animated.timing(translate, {
+        toValue: {
+          x: screenWidth,
+          y: this.state.currentPosition - layoutY + 8,
+        },
+        duration: 250,
+        useNativeDriver: true,
+      }),
+      Animated.timing(this.state.translateX, {
+        toValue: -screenWidth,
+        duration: 250,
+        useNativeDriver: true,
+      }),
+      Animated.timing(this.state.replyTranslateY, {
+        toValue: this.state.currentPosition + 100,
+        duration: 250,
+        delay: 250,
+        useNativeDriver: true,
+      }),
+    ]).start(onAnimationFinished);
+  }
+
+  hideDetail(translate, onAnimationFinished) {
+    this.setState({scrollEnabled: true});
+    Animated.parallel([
+      Animated.timing(translate, {
+        toValue: {
+          x: 0,
+          y: 0,
+        },
+        duration: 250,
+        useNativeDriver: true,
+      }),
+      Animated.timing(this.state.translateX, {
+        toValue: 0,
+        duration: 250,
+        useNativeDriver: true,
+      }),
+      Animated.timing(this.state.replyTranslateY, {
+        toValue: this.state.currentPosition + 100 + screenHeight,
+        duration: 250,
+        useNativeDriver: true,
+      }),
+    ]).start(onAnimationFinished);
+  }
+
+  render() {
+    return (
+      <AnimatedScrollView
+        style={[
+          styles.container,
+          {
+            transform: [
+              {
+                translateX: this.state.translateX,
+              },
+            ],
+          },
+        ]}
+        scrollEnabled={this.state.scrollEnabled}
+        onScroll={(event) =>
+          this.setState({currentPosition: event.nativeEvent.contentOffset.y})
+        }>
+        {this.props.hint === '' ? (
+          this.props.topics.map((topic, key) => (
+            <YooForumTopic
+              key={key}
+              topic={topic}
+              showDetail={this.showDetail}
+              hideDetail={this.hideDetail}
+            />
+          ))
+        ) : (
+          <View style={styles.hintContainer}>
+            <Image
+              source={require('../../assets/icon.png')}
+              style={styles.logo}
+            />
+            <Text style={styles.hint}>{this.props.hint}</Text>
+            <ActivityIndicator
+              size="large"
+              color="#0000ff"
+              style={styles.indicator}
+            />
+          </View>
+        )}
+        <AnimatedScrollView
+          ref={this.replyRef}
+          style={[
+            styles.repliesContainer,
+            {transform: [{translateY: this.state.replyTranslateY}]},
+          ]}>
+          {this.state.currentReplies.map((reply, key) => (
+            <YooReply key={key} reply={reply} />
+          ))}
+        </AnimatedScrollView>
+      </AnimatedScrollView>
+    );
+  }
+}

src/ui/YooLoginUI.js

@@ -6,6 +6,8 @@ import {
   TextInput,
   TouchableOpacity,
   Text,
+  ActivityIndicator,
+  ToastAndroid,
 } from 'react-native';
 
 const styles = StyleSheet.create({
@@ -35,36 +37,61 @@ const styles = StyleSheet.create({
     backgroundColor: '#1c90ce',
     width: 100,
     height: 50,
-    borderRadius: 8,
+    borderRadius: 25,
   },
   buttonText: {
     fontWeight: 'bold',
-    color: '#4d4c4d',
+    color: 'mintcream',
     fontSize: 26,
   },
 });
 
-function LoginInput(props) {
-  return props.type === 'username' ? (
-    <TextInput style={styles.input} placeholder={'账号'} maxLength={10} />
-  ) : (
-    <TextInput
-      style={styles.input}
-      placeholder={'密码'}
-      secureTextEntry={true}
-    />
-  );
+export default class YooLoginUI extends Component {
+  constructor(props) {
+    super(props);
+    this.state = {
+      loading: false,
+    };
+    this.onButtonPress = this.onButtonPress.bind(this);
+    this.onLoginFailed = this.onLoginFailed.bind(this);
+  }
+
+  onButtonPress() {
+    if (!this.state.loading) {
+      this.setState({loading: true});
+      this.props.loginCallback(this.onLoginFailed);
+    }
+  }
+
+  onLoginFailed(hint) {
+    this.setState({loading: false});
+    ToastAndroid.show(hint, ToastAndroid.SHORT);
   }
 
-export default class YooLoginUI extends Component {
   render() {
     return (
       <View style={styles.container}>
         <Image source={require('../../assets/icon.png')} style={styles.logo} />
-        <LoginInput type={'username'} />
-        <LoginInput type={'password'} />
-        <TouchableOpacity style={styles.button}>
+        <TextInput
+          style={styles.input}
+          placeholder={'账号'}
+          maxLength={10}
+          value={this.props.username}
+          onChangeText={(username) => this.props.setUsername(username)}
+        />
+        <TextInput
+          style={styles.input}
+          placeholder={'密码'}
+          secureTextEntry={true}
+          value={this.props.password}
+          onChangeText={(password) => this.props.setPassword(password)}
+        />
+        <TouchableOpacity style={styles.button} onPress={this.onButtonPress}>
+          {this.state.loading ? (
+            <ActivityIndicator size="large" color="#00ff00" />
+          ) : (
             <Text style={styles.buttonText}>登录</Text>
+          )}
         </TouchableOpacity>
       </View>
     );

src/ui/YooReply.js

@@ -0,0 +1,28 @@
+import React, {Component} from 'react';
+import {View, Text, StyleSheet} from 'react-native';
+
+const styles = StyleSheet.create({
+  container: {
+    backgroundColor: 'lightgray',
+    borderRadius: 8,
+    padding: 16,
+    margin: 8,
+  },
+  username: {
+    fontSize: 16,
+  },
+  content: {
+    fontSize: 24,
+  },
+});
+
+export default class YooReply extends Component {
+  render() {
+    return (
+      <View style={styles.container}>
+        <Text style={styles.username}>{this.props.reply.username}</Text>
+        <Text style={styles.content}>{this.props.reply.content}</Text>
+      </View>
+    );
+  }
+}

src/ui/YooSplashUI.js

@@ -0,0 +1,38 @@
+import React, {Component} from 'react';
+import {View, StyleSheet, Image, Text, ActivityIndicator} from 'react-native';
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+    alignItems: 'center',
+  },
+  logo: {
+    marginTop: 120,
+    width: 200,
+    height: 200,
+    marginBottom: 16,
+  },
+  text: {
+    fontSize: 24,
+    fontWeight: 'bold',
+  },
+  indicator: {
+    marginTop: 64,
+  },
+});
+
+export default class YooSplashUI extends Component {
+  render() {
+    return (
+      <View style={styles.container}>
+        <Image source={require('../../assets/icon.png')} style={styles.logo} />
+        <Text style={styles.text}>正在检查网络，请稍后</Text>
+        <ActivityIndicator
+          size="large"
+          color="#0000ff"
+          style={styles.indicator}
+        />
+      </View>
+    );
+  }
+}