React Native 常用的技术

下一个项目公司也打算使用React native.大致看了下原型设计,写几个小demo先试试水.特此记录下.

http://www.cnblogs.com/shaoting/p/7148240.html转载

1.微信及朋友圈分享.QQ及朋友圈分享,微博分享,微信支付,支付宝支付.

2.导航条渐隐

3.通讯录

4.卡片式轮播

5.时间轴

6.图片+列表的组合效果

7.图片下拉放大

8.原生视频播放器

9.react-navigation的使用和变更

10.倒计时

11.多张图片查看

12.自定义页面加载指示器

......

1.微信及朋友圈分享,微信支付: https://github.com/yorkie/react-native-wechat

  QQ分享:https://github.com/reactnativecn/react-native-qq

  微博分享: https://github.com/reactnativecn/react-native-weibo

   支付宝支付没有找到,只能跳转原生进行支付.

   大神刚出炉的React Native 分享功能封装【一行代码，双平台分享】 支持平台：【QQ】【QQ空间】【微信】【朋友圈】【微博】         https://github.com/songxiaoliang/react-native-share

2.导航条渐隐,该项目我们打算使用react-navigation,但是该库的导航条使用不了渐隐,于是只能在需要导航条渐隐的地方,改用自己定义的导航条.

基本代码如下:

 

  1 /**  2  * Created by shaotingzhou on 2017/5/9.  3  */  4 import React, { Component } from 'react';  5 import {  6     AppRegistry,  7     StyleSheet,  8     Text,  9     View, 10     Image, 11     TouchableOpacity, 12     Platform, 13     Dimensions, 14     RefreshControl, 15     FlatList, 16     ActivityIndicator, 17     ScrollView, 18     TextInput 19 } from 'react-native'; 20 var {width,height} = Dimensions.get('window'); 21 var dataAry = [] 22 var start  = 0 23  24 export default class OneDetailsFlat extends Component{ 25     //返回首页方法需要修改react-navigation库的源码.修改方法见:http://www.jianshu.com/p/2f575cc35780 26     static navigationOptions = ({ navigation }) => ({ 27         header:null, 28         title: 'FlatList', 29         headerStyle:{backgroundColor:'rgba(255,255,255,0.0)'}, 30         headerTintColor: 'black', 31         headerLeft:( 32             <Text onPress={()=>navigation.goBack("Tab")}>返回首页</Text> 33         ), 34     }) 35  36     // 构造 37     constructor(props) { 38         super(props); 39         // 初始状态 40         for(start = 0;start<20;start++){ 41             var obj = {} 42             obj.key = start 43             dataAry.push(obj) 44         } 45  46         this.state = { 47             opacity:0, 48             dataAry: dataAry, 50         }; 51     } 52     render() { 53         return ( 54             <View> 55                 <FlatList 56                     onScroll = {(e)=>{this.onScroll(e)}} 57                     data = {this.state.dataAry} 58                     renderItem = {(item) => this.renderRow(item)} 59                 /> 60                 <View style={{width:width,height:69,alignItems:'center',flexDirection:'row',position:'absolute',top:0,backgroundColor:'rgba(122,233,111,' + this.state.opacity + ')'}}> 61                     <Text style={{width:60,color:'red'}} onPress={()=>this.props.navigation.goBack(null)}>返回</Text> 62                 </View> 63             </View> 64         ); 65     } 66  67     //listView的renderRow 68     renderRow =(item) =>{ 69             return( 70                 <View style={{flexDirection:'row',marginTop:5,marginLeft:5,borderWidth:1,marginRight:5,borderColor:'#DEDEDE',backgroundColor:'white'}}> 71                     <Image source={require('../image/one_selected.png')} style={{width:60,height:60,borderRadius:30,marginTop:5,marginBottom:5}}/> 72                     <View style={{flexDirection:'column',justifyContent:'space-around',marginLeft:5}}> 73                         <Text style={{fontSize:16}}>歌名: 彩虹彼岸</Text> 74                         <View style={{flexDirection:'row'}}> 75                             <Text style={{fontSize:14,color:'#BDBDBD'}}>歌手:虚拟歌姬</Text> 76                             <Text style={{fontSize:14,color:'#BDBDBD',marginLeft:10}}>专辑:react native</Text> 77                         </View> 78                     </View> 79                 </View> 80             ) 81     } 82     onScroll =(e) =>{ 83         let y = e.nativeEvent.contentOffset.y; 84         if(y < 10 ){ 85             this.setState({ 86                 opacity:0 87             }) 88         }else if( y <= 69 && y>= 10){ 89             console.log(y/100) 90             this.setState({ 91                 opacity:y/100 92             }) 93         }else { 94             this.setState({ 95                 opacity:1 96             }) 97          } 98     } 99 100 };101 102 var styles = StyleSheet.create({103     container: {104         flex: 1,105         backgroundColor: '#F5FCFF',106     },107     welcome: {108         fontSize: 20,109         textAlign: 'center',110         margin: 10,111     },112     instructions: {113         textAlign: 'center',114         color: '#333333',115         marginBottom: 5,116     }117 });

 

 

3.通讯录采用三方库即可满足.https://github.com/sunnylqm/react-native-alphabetlistview

4.卡片式轮播采用三方库即可满足.https://github.com/archriss/react-native-snap-carousel

5.时间轴效果. 该效果采用FlatList打造即可.

/**
 * Created by shaotingzhou on 2017/7/10.
 */
import React, { Component } from 'react';
import {
    AppRegistry,
    StyleSheet,
    Text,
    View,
    FlatList,
    Dimensions,
    Image
} from 'react-native';
var {width,height} = Dimensions.get('window');
var dataAry = []
import data from './data.json'
export default class TimerShaft extends Component {
    // 构造
    constructor(props) {
        super(props);
        // 初始状态
        this.state = {
            dataAry: dataAry,
        };
    }

    render() {
        return (
            <View style={{marginTop:30}}>
            <FlatList
                data = {this.state.dataAry}
                renderItem = {(item) => this.renderRow(item)}
                keyExtractor={this.keyExtractor}
            />
            <View style={{width:1,height:height,backgroundColor:'red',position:'absolute',left:50}}></View>
            </View>
        );
    }

    renderRow =(item) =>{
        if(item.item.text){
            return(
                <View style={{marginBottom:10,marginLeft:60}}>
                    <Text>{item.item.text}</Text>
                </View>
            )
        }else{
            return(
                <View style={{flexDirection:'row',marginBottom:10}}>
                    {/*左边*/}
                    <View style={{width:60,marginBottom:10}}>
                        <View style={{flexDirection:'row',alignItems:'center'}}>
                            <Text>{item.item.time}</Text>
                            <View style={{width:10,height:10,borderRadius:5,backgroundColor:'red',position:'absolute',left:45}}></View>
                        </View>
                    </View>
                    {/*右边*/}
                    <View style={{backgroundColor:"#F2F2F2",marginLeft:5,width:width-70}} onLayout = {(event)=>this.onLayout(event)} >
                        <Text style={{}}>{item.item.content}</Text>
                        <View style={{flexDirection:'row',flexWrap:'wrap'}}>
                            {this.renderImg(item.item.image)}
                        </View>
                    </View>
                </View>
            )

        }



    }

    keyExtractor(item: Object, index: number) {
        return item.id
    }

    onLayout = (event)=>{
        console.log(event.nativeEvent.layout.height)
    }

    renderImg = (imgAry) =>{
        var renderAry = []
        for(var i = 0;i < imgAry.length; i++){
            if(imgAry.length == 1){
                renderAry.push(
                    <Image key={i} source={{uri:imgAry[0].url}} style={{width:200,height:200}}/>
                )
            }else if(imgAry.length == 2 || imgAry.length == 4){
                renderAry.push(
                    <Image key={i} source={{uri:imgAry[i].url}} style={{width:(width-70)*0.5-2,height:(width-70)*0.5-2,marginLeft:1,marginTop:1}}/>
                )
            }else {
                renderAry.push(
                    <Image key={i} source={{uri:imgAry[i].url}} style={{width:(width-70)/3-2,height:(width-70)/3-2,marginLeft:1,marginTop:1}}/>
                )
            }
        }

        return renderAry
    }

    componentDidMount() {
        this.setState({
            dataAry:data
        })
    }
}

const styles = StyleSheet.create({
    container: {
        flex: 1,
        justifyContent: 'center',
        alignItems: 'center',
        backgroundColor: '#F5FCFF',
    },
    welcome: {
        fontSize: 20,
        textAlign: 'center',
        margin: 10,
    },
    instructions: {
        textAlign: 'center',
        color: '#333333',
        marginBottom: 5,
    },
});

 这个是数据:

+ View Code

　　

 

 

 

6.图片+列表的组合效果

该效果采用ScrollView包含两个FlatList和一个ListView完成(ps:第三个横向的cell的单独使用FlatList可以,但是和其他组件搭配就错误.....)

 

  1 /**  2  * Created by shaotingzhou on 2017/7/6.  3  */  4 /**  5  * Sample React Native App  6  * https://github.com/facebook/react-native  7  * @flow  8  */  9  10 import React, { Component } from 'react'; 11 import { 12     AppRegistry, 13     StyleSheet, 14     Text, 15     View, 16     ScrollView, 17     Dimensions, 18     FlatList, 19     SectionList, 20     Image, 21     ListView 22 } from 'react-native'; 23 var {width,height} = Dimensions.get('window'); 24 var dataAry = [] 25 var dataAryOne = [] 26 var dataAryTwo = [] 27 var ds = new ListView.DataSource({rowHasChanged:(r1,r2)=> r1 !== r2}); 28  29 export default class Main extends Component { 30     // 构造 31     constructor(props) { 32         super(props); 33         // 初始状态 34         for(var i = 0;i<100;i++){ 35             var obj = {} 36             obj.key = i 37             dataAry.push(obj) 38         } 39  40         // 初始状态 41         for(var i = 0;i<10;i++){ 42             var obj = {} 43             obj.key = i 44             dataAryOne.push(obj) 45         } 46  47         // 初始状态 48         for(var i = 0;i<5;i++){ 49             var obj = {} 50             obj.key = i 51             dataAryTwo.push(obj) 52         } 53  54         this.state = { 55             index:1, 56             dataAry: dataAry, 57             dataAryOne:dataAryOne, 58             dataSource:ds.cloneWithRows(dataAryTwo) 59         }; 60     } 61  62     render() { 63         return ( 64             <View style={{flex:1}}> 65                 <View style={{backgroundColor:'cyan',height:69,justifyContent:'center',alignItems:'center'}}> 66                     <Text>导航条</Text> 67                 </View> 68                 <ScrollView 69                     style={{flex:1}} 70                     stickyHeaderIndices = {[1]} 71                 > 72  73                     <Image source={require('./1.gif')} style={{width:width,height:200}} /> 74  75                     <View style={{backgroundColor:'yellow'}}> 76                         <View style={{flexDirection:'row',justifyContent:'space-around',marginTop:20}}> 77                             <Text onPress={()=>{this.onClickOne()}} style={{color:this.state.index == 1 ? 'red' : 'cyan'}}>11111</Text> 78                             <Text onPress={()=>{this.onClickTwo()}} style={{color:this.state.index == 2 ? 'red' : 'cyan'}}>22222</Text> 79                             <Text onPress={()=>{this.onClickThree()}} style={{color:this.state.index == 3 ? 'red' : 'cyan'}}>33333</Text> 80                         </View> 81                     </View> 82  83                     {this.bottomViewRender()} 84  85                 </ScrollView> 86  87             </View> 88         ); 89     } 90     bottomViewRender = ()=>{ 91         if(this.state.index == 1){ 92             return( 93                 <FlatList 94                     data = {this.state.dataAry} 95                     renderItem = {(item) => this.renderRow(item)} 96                 /> 97             ) 98         }else if(this.state.index == 2){ 99             return(100                 <FlatList101                     data = {this.state.dataAryOne}102                     renderItem = {(item) => this.renderRowOne(item)}103                 />104             )105         }else {106             //这里横向只能使用ListView或者SctionList.FLatList设置横向属性报错107             return(108                 <ListView109                     dataSource={this.state.dataSource}110                     renderRow={this.renderRowTwo}111                     contentContainerStyle={styles.listViewStyle}112                 />113             )114         }115 116     }117 118 119     onClickOne =()=>{120         this.setState({121             index:1,122         })123     }124     onClickTwo =()=>{125         this.setState({126             index:2,127         })128     }129     onClickThree =()=>{130         this.setState({131             index:3,132         })133     }134 135 136     renderRow =(item) =>{137         return(138             <View style={{flexDirection:'row',marginTop:5,marginLeft:5,borderWidth:1,marginRight:5,borderColor:'#DEDEDE',backgroundColor:'white'}}>139                 <View style={{flexDirection:'column',justifyContent:'space-around',marginLeft:5}}>140                     <Text style={{fontSize:16}}>歌名: 彩虹彼岸</Text>141                     <View style={{flexDirection:'row'}}>142                         <Text style={{fontSize:14,color:'#BDBDBD'}}>歌手:虚拟歌姬</Text>143                         <Text style={{fontSize:14,color:'#BDBDBD',marginLeft:10}}>专辑:react native</Text>144                     </View>145                 </View>146             </View>147         )148 149     }150 151     renderRowOne =(item) =>{152         return(153             <View style={{flexDirection:'row',marginTop:5,marginLeft:5,borderWidth:1,marginRight:5,borderColor:'#DEDEDE',backgroundColor:'white'}}>154                 <View style={{flexDirection:'row'}}>155                     <Text style={{fontSize:14,color:'#BDBDBD'}}>歌手:虚拟歌姬</Text>156                     <Text style={{fontSize:14,color:'#BDBDBD',marginLeft:10}}>专辑:react native</Text>157                 </View>158             </View>159         )160 161     }162 163     renderRowTwo(rowData){164         return(165                 <View style={styles.innerViewStyle}>166                     <Image source={require('./2.jpeg')} style={{width:150,height:150}} />167                     <Text>你的名字</Text>168                 </View>169         );170     }171     //172     // renderRowTwo =(item) =>{173     //174     //     return (175     //         <View>176     //             {177     //                 dataAryTwo.map(function (item, i) {178     //                 return (179     //                     <View style={{marginLeft:5}} key={i}>180     //                         <Image source={require('./2.jpeg')} style={{width:150,height:150}} />181     //                         <Text>你的名字</Text>182     //                     </View>183     //                 );184     //             })185     //             }186     //         </View>187     //     )188     // }189 190 191 }192 193 const styles = StyleSheet.create({194     container: {195         flex: 1,196         justifyContent: 'center',197         alignItems: 'center',198         backgroundColor: '#F5FCFF',199     },200     welcome: {201         fontSize: 20,202         textAlign: 'center',203         margin: 10,204     },205     instructions: {206         textAlign: 'center',207         color: '#333333',208         marginBottom: 5,209     },210     listViewStyle:{211         //改变主轴方向212         flexDirection:'row',213         //多行显示214         flexWrap:'wrap'215     },216 });

 

7.图片上拉放大:https://github.com/lelandrichardson/react-native-parallax-view

8.原生视频播放器:https://github.com/cornedor/react-native-video-player

9.react-navigation的使用和变更:

使用介绍:  http://www.jianshu.com/p/2f575cc35780

demo: https://github.com/pheromone/navigationDemo 

 在使用react-navigation中遇到几个难点:

• 1.跳至相应路由(如返回首页功能).  http://www.jianshu.com/p/2f575cc35780
• 2.防止点击过快,跳界面两次.  https://github.com/react-community/react-navigation/pull/1348/files
• 3.static中使用this.  http://www.jianshu.com/p/2f575cc35780

10.倒计时:https://github.com/kkkelicheng/ReactNative-CountDownButton

优点:  不会因为进入后台而停止读秒

         支持同个页面再次进入时，智能的判断读秒时间，显示是否继续计时

11.多张图片查看:https://github.com/ascoders/react-native-image-viewer

12.因为下个项目是有关狗狗的,页面加载需要一个指示器.在不考虑性能上暂时使用gif图+Modal实现.

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/**

 * Sample React Native App

 * https://github.com/facebook/react-native

 * @flow

 */

 

import React, { Component } from 'react';

import {

  AppRegistry,

  StyleSheet,

  Text,

  View,

    Modal,

    Image,

    Dimensions

} from 'react-native';

var {width,height} = Dimensions.get('window');

 

export default class model extends Component {

  // 构造

    constructor(props) {

      super(props);

      // 初始状态

      this.state = {

          visible:true

      };

    }

  render() {

    return (

      <View>

        <Modal

            visible={this.state.visible}    // 根据isModal决定是否显示

        >

          <View style={{backgroundColor:'rgba(0,0,0,0.4)',width:width,height:height,justifyContent:'center',alignItems:'center'}}>

            <Image source={require('./food.gif')} style={{width:120,height:120,borderRadius:5}}/>

            <Text style={{color:'white'}}>狗生思考中...</Text>

          </View>

        </Modal>

      </View>

    );

  }

 

 

    componentDidMount() {

      //模拟请求数据,请求OK,把visible置为false即可

        this.timer = setTimeout(

            () => {

                this.setState({

                    visible:false

                })

            },

            1000

        );

    }

 

 

    componentWillUnmount() {

        this.timer && clearTimeout(this.timer);

    }

 

}

 

const styles = StyleSheet.create({

  container: {

    flex: 1,

    justifyContent: 'center',

    alignItems: 'center',

    backgroundColor: '#F5FCFF',

  },

  welcome: {

    fontSize: 20,

    textAlign: 'center',

    margin: 10,

  },

  instructions: {

    textAlign: 'center',

    color: '#333333',

    marginBottom: 5,

  },

});

 

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

　　

其中,关于Android下使用gif图需要简单配置下,请查看http://www.cnblogs.com/shaoting/p/5934725.html的第25条内容.