当用户登录时，我想显示用户名并将按钮文本从导航栏（导航组件）中的“登录”更改为“注销”。我厌倦了通过将路由器历史位置推送到用户登录的主页来重新渲染导航组件在。
this.props.history.push('/')
然后用户可以成功登录，用户数据保存在localStorage中，路由器位置发生变化。数据保存在 localStorage 中，但组件不会重新渲染。
这是我尝试过的。
试图将“connected-react-router”降级为“v6.0.0”，但它给我带来了一些错误。所以把它放回最新版本'^6.4.0'。
尝试在作为父组件的 App.js 中添加导航栏代码。但是 app.js 本身也不会在用户登录时重新渲染。
应用程序.js
import React from 'react';
import { connect } from 'react-redux';
/* --- Components --- */
import Nav from './src/components/nav';
import Loader from './src/shared/loader';
import './styles/main.scss';
const FlashMessagesContainer = Loader({
loader: () =>
import('./src/shared/flassMessagesContainer' /* webpackChunkName: 'FlashMessagesContainer' */),
});
const App = (props, { isOnModal }) => (
<div id="app">
<Nav />
{!isOnModal && (
<div className="flex justify-center">
<FlashMessagesContainer />
</div>
)}
{props.children}
</div>
);
const mapPropsToState = state => ({
isOnModal: state.modal.show,
});
export default connect(
mapPropsToState,
null,
)(App);
导航.js
import React, { Component } from 'react';
import { connect } from 'react-redux';
import { Link, withRouter } from 'react-router-dom';
/* --- Components --- */
import {
isLoggedIn,
getCompanyName,
clearLocalStorage,
} from '../../localStorage';
class Nav extends Component {
handleUserLogout = async ev => {
ev.preventDefault();
await clearLocalStorage();
return this.props.history.push('/login');
};
render() {
return (
<div className="nav">
{isLoggedIn() ? (
<div className="flex">
<p className="mr3 mt2">
안녕하세요. <span className="b">{getCompanyName()}</span>
 님,
</p>
<button
type="button"
className="login-btn td-none c-text br f-mini"
onClick={this.handleUserLogout}
>
로그아웃
</button>
</div>
) : (
<Link className="login-btn td-none c-text br f-mini" to="/login">
로그인
</Link>
)}
</div>
);
}
}
export default withRouter(Nav);
localStorage.js
export const getToken = () => localStorage.token;
export const getCompanyName = () => localStorage.companyName;
export const isLoggedIn = () => !!localStorage.token;
export const saveUserNameAndToken = userData => {
localStorage.setItem('token', userData.token);
localStorage.setItem('companyName', userData.companyName);
};
export const clearLocalStorage = () => localStorage.clear();
index.js
import React from 'react';
import { render } from 'react-dom';
import { Provider } from 'react-redux';
import { ConnectedRouter as Router } from 'connected-react-router';
import { MuiThemeProvider, createMuiTheme } from '@material-ui/core/styles';
import configureStore, { history } from './store';
import Routes from './routes';
const theme = createMuiTheme({
...
});
const store = configureStore();
const root = document.createElement('div');
document.body.appendChild(root);
render(
<Provider store={store}>
<MuiThemeProvider theme={theme}>
<Router history={history}>
<Routes />
</Router>
</MuiThemeProvider>
</Provider>,
root,
);
路由.js
import React from 'react';
import { Switch, Route } from 'react-router-dom';
import { hot, setConfig } from 'react-hot-loader';
import { withRouter } from 'react-router';
/* --- Components --- */
import App from './app';
import Loader from './src/shared/loader';
const Home = Loader({
loader: () =>
import('./src/components/home/homeContainer' /* webpackChunkName: 'Home' */),
});
...
const routes = props => (
<div>
<App history={props.history} />
<Switch>
<Route exact path="/" component={Home} />
<Route path="/login" render={props => <Login {...props} />} />
<Route path="/users/account" component={Users} />
<Route component={NoMatch} />
</Switch>
</div>
);
const Routes =
!module.hot || process.env.NODE_ENV === 'production'
? routes
: hot(module)(routes);
export default withRouter(Routes);
我希望在路由器位置更改时重新渲染 Nav 组件。
react: ^16.8.6
react-dom: ^16.8.6
react-loadable: ^5.5.0
react-redux: ^6.0.0
react-router-dom: ^4.3.1
redux: ^4.0.0
connected-react-router: ^6.4.0