作为 ReactJS 开发者如何开始使用 React Native？

import react from 'react';import { view, text } from 'react-native';const greetingcomponent = ({ name }) =&gt; {  return (    <view><text>hello, {name}!</text></view>  );};export default greetingcomponent;

import react, { usestate } from 'react';import { view, text, button, stylesheet } from 'react-native';const greetingcomponent = () =&gt; {  const [name, setname] = usestate('john');  const changename = () =&gt; {    setname('jane');  };  return (    <view style="{styles.container}"><text>hello, {name}!</text><button title="change name" onpress="{changename}"></button>    </view>  );};export default greetingcomponent;

import react from 'react';import { render, fireevent } from '@testing-library/react-native';import greetingcomponent from './greetingcomponent';test('it renders correctly and changes name on button press', () =&gt; {  // render the component  const { getbytext } = render(<greetingcomponent></greetingcomponent>);  // assert initial state  expect(getbytext('hello, john!')).tobetruthy();  // find the button and simulate a press  const button = getbytext('change name');  fireevent.press(button);  // assert that the name has changed  expect(getbytext('hello, jane!')).tobetruthy();});