对不起,如果我要问初学者的水平问题。我是React.js的新手,最近我一直在尝试通过阅读本教程来掌握这些概念: JustDjango
我要完成的工作是创建一个使用redux存储状态的登录表单,我的代码如下:
import React from 'react';
import { Form, Icon, Input, Button, Spin } from 'antd/lib';
import { connect } from 'react-redux';
import { NavLink } from 'react-router-dom';
import * as actions from '../store/actions/auth';
const FormItem = Form.Item;
const antIcon = <Icon type="loading" style={{ fontSize: 24 }} spin />;
class NormalLoginForm extends React.Component {
handleSubmit = (e) => {
e.preventDefault();
this.props.form.validateFields((err, values) => {
if (!err) {
this.props.onAuth(values.userName, values.password);
this.props.history.push('/');
}
});
}
render() {
let errorMessage = null;
if (this.props.error) {
errorMessage = (
<p>{this.props.error.message}</p>
);
}
const { getFieldDecorator } = this.props.form;
return (
<div>
{errorMessage}
{
this.props.loading ?
<Spin indicator={antIcon} />
:
<Form onSubmit={this.handleSubmit} className="login-form">
<FormItem>
{getFieldDecorator('userName', {
rules: [{ required: true, message: 'Please input your username!' }],
})(
<Input prefix={<Icon type="user" style={{ color: 'rgba(0,0,0,.25)' }} />} placeholder="Username" />
)}
</FormItem>
<FormItem>
{getFieldDecorator('password', {
rules: [{ required: true, message: 'Please input your Password!' }],
})(
<Input prefix={<Icon type="lock" style={{ color: 'rgba(0,0,0,.25)' }} />} type="password" placeholder="Password" />
)}
</FormItem>
<FormItem>
<Button type="primary" htmlType="submit" style={{marginRight: '10px'}}>
Login
</Button>
Or
<NavLink
style={{marginRight: '10px'}}
to='/signup/'> signup
</NavLink>
</FormItem>
</Form>
}
</div>
);
}
}
const WrappedNormalLoginForm = Form.useForm()(NormalLoginForm);
const mapStateToProps = (state) => {
return {
loading: state.loading,
error: state.error
}
}
const mapDispatchToProps = dispatch => {
return {
onAuth: (username, password) => dispatch(actions.authLogin(username, password))
}
}
export default connect(mapStateToProps, mapDispatchToProps)(WrappedNormalLoginForm);
错误回溯显示错误来自:
76 | const WrappedNormalLoginForm = Form.useForm()(NormalLoginForm);
77 |
78 | const mapStateToProps = (state) => {
79 | return {
一些针对此特定错误的google搜索表明,此错误与在基于分类的组件中定义的挂钩有关,但是我不明白为什么:
const mapStateToProps = (state) => {......
被认为是一个钩子
将非常感谢任何人的帮助!
答案 0 :(得分:1)