ReactNative 学习记录(二)

RN 的环境搭建和基础操作参照官方文档:查看

学习做一个 videoplay的 app

(更新中)

• 初始化项目

react-native init videoplay

• 然后在模拟器运行

• 使用官方实例学习 TabBarIOS: 查看

index.ios.js

import React, { Component } from 'react';
import {
  AppRegistry,
  StyleSheet,
  Text,
  View,
  TabBarIOS,
} from 'react-native';

var base64Icon = 'data:image/png;base64,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';

class videoplay extends Component {

  constructor(props) {
    super(props);
    this.state = {
      selectedTab: 'redTab',
      notifCount: 0,
      presses: 0,
    };
  }  

  render() {
    return (
      
         {
            this.setState({
              selectedTab: 'blueTab',
            });
          }}>
          
        
         {
            this.setState({
              selectedTab: 'redTab',
              notifCount: this.state.notifCount + 1,
            });
          }}>
          
        
         {
            this.setState({
              selectedTab: 'greenTab',
              presses: this.state.presses + 1
            });
          }}>
          
        
      
    );
  }
}
AppRegistry.registerComponent('videoplay', () => videoplay);

出现报错

error

查错

因为tabbar.item必须全部有组件 需要给每个Tabar.item中返回一个组件
加上组件

改错

效果

当前index.ios.js

import React, { Component } from 'react';
import {
  AppRegistry,
  StyleSheet,
  Text,
  View,
  TabBarIOS,
} from 'react-native';

var base64Icon = 'data:image/png;base64,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';

class videoplay extends Component {

  constructor(props) {
    super(props);
    this.state = {
      selectedTab: 'redTab',
      notifCount: 0,
      presses: 0,
    };
  }  

  render() {
    return (
      
         {
            this.setState({
              selectedTab: 'blueTab',
            });
          }}>
          
             
              tab1
            
          
        
         {
            this.setState({
              selectedTab: 'redTab',
              notifCount: this.state.notifCount + 1,
            });
          }}>
          
             
              tab2
            
          
        
         {
            this.setState({
              selectedTab: 'greenTab',
              presses: this.state.presses + 1
            });
          }}>
          
             
              tab3
            
          
        
      
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#F5FCFF',
  },

});

AppRegistry.registerComponent('videoplay', () => videoplay);

接下来去除 state 里面不用的代码
把 view 放进其他的 index.js 再导入index.ios.js 作为组件

文件目录

引入 class

使用

改写 creation 下的 index.js

import React, { Component } from 'react';

import Icon from 'react-native-vector-icons/Ionicons'

import {
  StyleSheet,
  Text,
  View,
  ListView,
  TouchableHighlight,
  Image,
} from 'react-native';


class List extends Component {
  // 初始化模拟数据
  constructor(props) {
    super(props);
    const ds = new ListView.DataSource({rowHasChanged: (r1, r2) => r1 !== r2});
    this.state = {
      dataSource: ds.cloneWithRows([
        {
            "thumb": "http://dummyimage.com/'200x100' /fac2d4 )",
            "video": "http://v2.mukewang.com/c2ba38b4-3d56-4057-8877-63b1510a7d7c/L.mp4?auth_key=1482849494-0-0-49e7e1c7f68cdeefb516569b84713f3d",
            "title": "Urpmh Wgbmjedbfz",
            "_id": "450000197710261527"
        },
        {
            "thumb": "http://dummyimage.com/'200x100' /1962f8 )",
            "video": "http://v2.mukewang.com/c2ba38b4-3d56-4057-8877-63b1510a7d7c/L.mp4?auth_key=1482849494-0-0-49e7e1c7f68cdeefb516569b84713f3d",
            "title": "Ayini Doplyi Wlkckalak Bxytjxdo",
            "_id": "430000197201302112"
        },
        {
            "thumb": "http://dummyimage.com/'200x100' /433741 )",
            "video": "http://v2.mukewang.com/c2ba38b4-3d56-4057-8877-63b1510a7d7c/L.mp4?auth_key=1482849494-0-0-49e7e1c7f68cdeefb516569b84713f3d",
            "title": "Dmcgk Huejehql Uspfj Hkduefbtq",
            "_id": "81000019731118228X"
        }
      ]),
    };
  }
  renderRow(rowData){
    return(
      
        
          {rowData.title}
          
          
          
            
                
              
                喜欢
              
            
            
                
              
                评论
              
            
          
        
      
    );
  }

  render() {
    return (
      
        
      
    );
  }
}

const styles = StyleSheet.create({
  item:{

  },

});
export default List

效果

然后添加样式

const styles = StyleSheet.create({
  container:{
    flex: 1,
    backgroundColor: '#f5fcff'
  },
  header: {
    paddingTop: 25,
    paddingBottom: 12,
    backgroundColor: '#ee735c'
  },
  headerTitle: {
    color: '#fff',
    fontSize: 16,
    textAlign: 'center',
    fontWeight: '600'
  },
  item:{
    width: width,
    marginBottom: 10,
    backgroundColor: '#fff',
    borderBottomColor: '#eee',
    borderBottomWidth: 1,
    borderTopColor: '#eee',
    borderTopWidth: 1
  },
  thumb: {
    width: width,
    height: width*0.56,
    resizeMode: 'cover',
  },
  title: {
    padding: 10,
    fontSize: 18,
    color: '#333'
  },
  itemFooter:{
    borderTopColor: '#eee',
    borderTopWidth: 1,
    flexDirection: 'row',
    justifyContent: 'space-between',
    backgroundColor: '#eee'
  },
  play: {
    position: 'absolute',
    bottom: 60,
    right: 14,
    width: 46,
    height: 46,
    paddingTop: 9,
    paddingLeft: 18,
    backgroundColor: 'transparent',
    borderColor: '#aaa',
    borderWidth: 1,
    borderRadius: 23,
    color: '#ed7b66'
  },
  handleBox:{
    flexDirection: 'row',
    padding: 10,
    width: width*0.5-0.5,
    justifyContent: 'center',
    backgroundColor: '#fff'
  },
  handleText: {
    paddingLeft: 12,
    paddingTop: 2,
    fontSize: 18,
    color: '#333'
  },
  up: {
    fontSize: 22,
    color: '#333'
  },
  comment: {
    fontSize: 22,
    color: '#333'
  },
});

效果

如果图片加载不出来 参考查看