//函数式组件 import * as React from "react"; import { Component } from "react"; import logo from "../../assets/logo.svg"; import styles from "./Header.module.css"; import { Layout, Typography, Input, Menu, Button, Dropdown } from "antd"; import { GlobalOutlined } from "@ant-design/icons"; import { useHistory, useParams, useLocation, useRouteMatch, } from "react-router-dom"; export const Header: React.FC = () => { const history = useHistory(); const params = useParams(); const location = useLocation(); const match = useRouteMatch(); return ( <>