ReactNative→引用类和函数

class GoodMorning extends Component{

    static defaultProps = {
        name: 'man'
    };

    render(){
       return(

             
                 {this.props.name}
             
       )
    }

}

const GoodEvening = (props) => {

    return(

        {props.name}
    )
}

var  helloworld = React.createClass({

  render() {

    return (

        


            
            


        
    );
})

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