RN报错Only one default export allo

Only one default export allowed per module

export default class声明的类只能有一个，并且被引用的类要符合执行顺序

importReact, {Component} from'react';

import{Text,View} from'react-native';

class Greeting extends Component {

 render() { 

return( Hello{this.props.name}! );

 }

}

export default classLotsOfGreetings extendsComponent{ 

 render() {

       return(

        );

 }

}