使用属性，定制组件

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

 class CoustomGreeting extends Component{
   render(){
     return(
       <Text style = {{backgroundColor:'white'}}>{this.props.name} Demo!             </Text>
      )
  }
}
class hello extends Component {
  render() {
    let pic = {uri:'https://facebook.github.io/react/img/logo_og.png'};
    return (
      <View style={styles.container}>
        <CoustomGreeting name='Rexxar' />
        <CoustomGreeting name='Jaina' />
        <CoustomGreeting name='Valeera' />
       </View>
    );
  }
}