ReactNative→引用类和函数

class GoodMorning extends Component{

    static defaultProps = {
        name: 'man'
    };

    render(){
       return(

             <View>
                 <Text>{this.props.name}</Text>
             </View>
       )
    }

}

const GoodEvening = (props) => {

    return(

        <Text>{props.name}</Text>
    )
}

var  helloworld = React.createClass({

  render() {

    return (

        <View style={styles.container}>


            <GoodMorning name="haha" />
            <GoodEvening name="lala" />


        </View>
    );
})

组件是一个class或者一个函数，class用defaultProps来访问