相关代码：

import React, { Component } from 'react';
import { Button } from 'antd';
import axios from 'axios';
import './style.css'

class Login extends Component {
    constructor(props) {
        super(props);
        this.state = {
            login: true
        }
    }
    componentDidMount(){
        axios.get('http://www.dell-lee.com/react/api/isLogin.json')
        .then(res =>{
            console.log("isLogin"+res)
        })
    }
    render() {
        const { login } = this.state
        return (
            <div className='login'>
                {
                    login ?
                        <Button type="primary">登陆</Button> :
                        <Button type="primary">退出</Button>
                }

            </div>
        )
    }
}
export default Login;

相关截图：

​我的：

老师的