如何使用路由器/路由器参数在 react 中将数据从一个父组件传输到另一个父组件

Question

我是反应应用程序开发的新手，我正在发送在此处列出我的代码以获取解决方案，有不同的文件

现在我有 1 个索引.html和一个应用程序.js和索引.js登录.js和产品.js

我的应用程序.js已将路由实现到其中并索引中.js在其中具有浏览器路由器并登录JS具有Axios API调用和普通登录应用程序，并且通过成功登录，我将移动到另一个页面，即产品.js

所以列出我的文件

1( 应用程序.js

import React from 'react';
import { Switch, Route } from 'react-router-dom'
import Product from './components/product';
import Coal from './components/coal';
import Summary from './components/summary';
import Login from './components/login';
class App extends React.Component {
render() {
return (
<Switch>
<Route exact path = '/' component = {Login} />
<Route path = "/product" component = {Product} />
<Route path = "/coal" component = {Coal} />
<Route path = "/summary" component = {Summary} />
</Switch>
);
}
}
export default App;

2(指数.js

import React from 'react';
import ReactDOM from 'react-dom';
import {BrowserRouter} from 'react-router-dom';
import '../node_modules/bootstrap/dist/css/bootstrap.min.css';
import './index.css';
import App from './App';
import Login from './components/login';
import registerServiceWorker from './registerServiceWorker';
ReactDOM.render(<BrowserRouter historty = {this.historty}>
<Login/>
</BrowserRouter>, document.getElementById('root'));
registerServiceWorker();

3( 登录.js

import React from 'react'
import axios from 'axios';
class Login extends React.Component  {
constructor(props) {
super(props)
this.state = ({
admin_id : '',
password : '',
});
this.handlePassword = this.handlePassword.bind(this);
this.handleUserName  =this.handleUserName.bind(this);
this.loginUp = this.loginUp.bind(this);
}
handleUserName(e) {
e.preventDefault();
this.setState({admin_id: e.target.value})
}
handlePassword(e) {
e.preventDefault();
this.setState({password: e.target.value})
}
componentDidMount() {
}
loginUp() {
let userDetails = {
admin_id: this.state.admin_id,
password: this.state.password
}
if(this.state.admin_id === '' && this.state.password === '') {
alert('please enter fields');
} else {
axios.post("http://103.10.191.145:1337/sapl/admin/login", userDetails , this.axiosConfig)
.then((res) => {
if(res.data === 'Admin login successfully'){
this.setState({userName : userDetails.admin_id})
this.props.history.push('/product');        
} else {
alert('we are not in success');
}
})
.catch((err) => {
console.log('axios error' , err);
})
}
}

render() {
return(
<div className = "container">
<div className ="row">
<div className = "col-md-12">
<h3>Login</h3>
<input className="form-control" type="text" placeholder="EmailID" value = {this.state.admin_id}  onChange = {this.handleUserName} />
<input className="form-control" type="password" placeholder="password" value = {this.state.password} onChange={this.handlePassword} />
<button className="btn btn-primary" type="button" onClick={() => this.loginUp()}> Login</button>
</div>
</div>
</div>
)   
}
}
export default Login

4(产品.js

import React from 'react';
class Product extends React.Component {
constructor(props){
super(props);
}
coalOption() {
this.props.history.push('/coal');
}
componentDidMount() {
var usname   = this.state;
console.log('usen' , usname);
}
render() {
return(
<div className = 'container'>
<div className = 'row'>
<div className = 'col-md-12'>
<h3>Welcome the username</h3>
<button className="btn btn-primary" type="button" onClick={() => this.coalOption()}>coal</button>
</div>
</div>
</div>
)
}
}
export default Product

所以我想将用户名输入我的产品.js并将其打印到 html 标签中，请有人帮忙我想展示案例 PoC

Answer 1

你可以用history.push传递变量

this.props.history.push({
pathname: '/product',
userDetails: userDetails,
})

并在组件product访问它们，如下所示：

this.props.location.userDetails

我希望这会有很大帮助。