在我的应用程序中按下提交按钮后,我试图重定向用户,但是重定向从未发生。提交按钮后,我要通过axios将数据发送到API,然后要重定向。这是通过在构造函数中先将重定向状态设置为false来完成的,在发送了axios调用后,我试图将其状态设置为true,然后如果该值为true,则有条件地呈现一个React Router重定向。
我已经确认Axios实际上将数据发送到后端。但是不知道为什么在将值设置为true后为什么不执行条件渲染。有任何想法吗? :)
我的代码:
import React from 'react';
import Button from '@material-ui/core/Button';
import CssBaseline from '@material-ui/core/CssBaseline';
import axios from 'axios';
import { Redirect } from 'react-router';
class confirmWithdraw extends React.Component {
constructor() {
super();
this.state = {
redirect: false
};
this.handleSubmit = this.handleSubmit.bind(this);
}
handleEvent = e => {
this.setState({ [e.target.name]: e.target.value });
};
handleSubmit = e => {
e.preventDefault();
const amount = sessionStorage.getItem('amount');
const serverCardNumber = sessionStorage.getItem('cardnumber');
axios({
method: 'post',
url: '/api/whidrawal',
data: {
amount,
serverCardNumber
}
}).then(() => this.setState({ redirect: true }));
};
render() {
const { redirect } = this.state;
if (redirect) {
return <Redirect to="/moneyform" />;
}
return (
<React.Fragment>
{redirect ? <Redirect to="/moneyform" /> : null}
<div>
Select action -> Withdraw -> <b>Confirm -></b> Take cash -> Finished? -> Take card{' '}
</div>
<div>{sessionStorage.getItem('amount')}</div>
<h1>Please confirm the withdraw of {sessionStorage.getItem('amount')} NOK </h1>
<CssBaseline /> {/*https://material-ui.com/style/css-baseline */}
<form onSubmit={this.handleSubmit}>
<br />
{/* Bytt ut med CSS block elementer eller noe slikt, bytt name på form fields til å hentes via JS */}
<div className="container">
<Button type="submit" variant="contained" color="primary" className="floatRight">
Confirm
</Button>
<Button type="submit" variant="contained" color="secondary" className="floatLeft">
Cancel
</Button>
</div>
</form>
</React.Fragment>
);
}
}
export default confirmWithdraw;
答案 0 :(得分:3)
假设您正在使用react-router v4,则需要使用历史对象进行导航。
None