九宫格练习

import React, { Component } from  'react';
import {
    Platform,
    StyleSheet,
    View,
    Text,
    Image,
    Dimensions
} from 'react-native';

var Data = require('./Data.json');
var screenWidth = require('Dimensions').get('window').width;
var boxW = 100;
var vMargin = (screenWidth - 100*3)/4;
var hMargin = 25.0;

export default class App extends Component{

    render(){
        return(
            <View style={styles.container}>
               <View style={styles.viewStyle}>
                   {this.renderAllBaoBao()}
               </View>
            </View>
        )
    }

    /* 返回所有view方法 */
    renderAllBaoBao(){
        console.log(Data.length);
        var views = [];
        for (var i=0; i < Data.length; i++){
            views.push(
                <View key={i} style={styles.viewSmallStyle}>
                    <Image style={styles.imageStyle} source={require('./images/laptop_phone_howitworks.png')}/>
                    <Text>
                        图片
                    </Text>
                </View>
            );
        }
        return views;
    }
}

const styles = StyleSheet.create({
    container:{
        flex:1,
        backgroundColor:'black',
    },

    viewStyle:{
        flexDirection:'row',
        flexWrap:'wrap',
        backgroundColor: 'white',
    },

    viewSmallStyle:{
        width:boxW,
        height:boxW,
        marginLeft:vMargin,
        marginTop:hMargin,
        justifyContent: 'center',
        alignItems:'center',
    },

    imageStyle:{
        width:80,
        height:80,
        resizeMode:'stretch'
    }
});