因此，我已经使用我在注册页面中使用的React-Final-Form构建了一个向导表单。我试图弄清楚如何在最终页面上显示所有用户输入，以便用户在提交之前仔细检查/验证其输入。任何帮助将不胜感激！
（P.S。-我尝试过在发布前进行研究，但我发现只能将用户输入存储在Redux中并从那里访问它们，如果可能的话，我想避免这样做。）
这里是一个示例链接，显示了我想要做的事情-如果您想找出解决方案，请随意使用它！ https://codesandbox.io/s/0332k02x0v
这是代码，缩短为仅包含相关位：
我的Wizard.js页面：
import React, { Component } from "react";
import PropTypes from "prop-types";
import { Form } from "react-final-form";
class Wizard extends Component {
static propTypes = {
onSubmit: PropTypes.func.isRequired
};
static Page = ({ children }) => children;
constructor(props) {
super(props);
this.state = {
page: 0,
values: props.initialValues || {}
};
}
next = values =>
this.setState(state => ({
page: Math.min(state.page + 1, this.props.children.length - 1),
values
}));
previous = () =>
this.setState(state => ({
page: Math.max(state.page - 1, 0)
}));
validate = values => {
const activePage = React.Children.toArray(this.props.children)[
this.state.page
];
return activePage.props.validate ? activePage.props.validate(values) : {};
};
handleSubmit = values => {
const { children, onSubmit } = this.props;
const { page } = this.state;
const isLastPage = page === React.Children.count(children) - 1;
if (isLastPage) {
return onSubmit(values);
} else {
this.next(values);
}
};
render() {
const { children } = this.props;
const { page, values } = this.state;
const activePage = React.Children.toArray(children)[page];
const isLastPage = page === React.Children.count(children) - 1;
return (
<Form
initialValues={values}
validate={this.validate}
onSubmit={this.handleSubmit}
>
{({ handleSubmit, submitting, values }) => (
<form onSubmit={handleSubmit}>
{activePage}
<div className="buttons">
{page > 0 && (
<button type="button" onClick={this.previous}>
« Previous
</button>
)}
{!isLastPage && <button type="submit">Next »</button>}
{isLastPage && (
<button type="submit" disabled={submitting}>
Submit
</button>
)}
</div>
{/* <pre>{JSON.stringify(values, 0, 2)}</pre> */}
</form>
)}
</Form>
);
}
}
export default Wizard;
我的index.js页面：
import React, { Component } from "react";
import { Field } from "react-final-form";
import formatString from "format-string-by-pattern";
import PropTypes from "prop-types";
import { connect } from "react-redux";
import Wizard from "./Wizard";
import Styles from "./Styles";
import { addUser } from "../../../actions/authActions";
class ReactFinalForm2 extends Component {
state = {};
render() {
const onSubmit = async values => {
this.props.addUser(values);
// API query here
};
const Error = ({ name }) => (
// Error handing here
);
return (
<Styles>
<div>
<Wizard initialValues={{}} onSubmit={onSubmit}>
<Wizard.Page
validate={values => {
// Page validation here
}}
>
// Page inputs here
</Wizard.Page>
<Wizard.Page
validate={values => {
// Page validation here
}}
>
// Page inputs here
</Wizard.Page>
<Wizard.Page
validate={values => {
// Page validation here
}}
>
// Page inputs here
</Wizard.Page>
<Wizard.Page>
{/* *** THIS IS WHERE I WOULD LIKE TO DISPLAY ALL PREVIOUS VALUES (SO THE USER CAN CONFIRM / DOUBLE-CHECK THEIR INPUTS BEFORE SUBMITTING) *** */}
</Wizard.Page>
</Wizard>
</div>
</Styles>
);
}
}
ReactFinalForm2.propTypes = {
addUser: PropTypes.func.isRequired
};
export default connect(
null,
{ addUser }
)(ReactFinalForm2);
答案 0 :(得分：1)
我已经向父组件添加了状态。更改孩子每次提交时的状态。我有JSON字符串化了父组件中的状态。如您所说，无需使用redux，这是我自带的解决方法。您的代码仍有改进的潜力。请检查此工作沙箱：
[https://codesandbox.io/s/zrvloq4o6x]
Wizard.js更改
handleSubmit = values => {
const { children, onSubmit } = this.props;
const { page } = this.state;
const isLastPage = page === React.Children.count(children) - 1;
if (isLastPage) {
return onSubmit(values);
} else {
this.next(values);
}
// Change added
this.props.onStateChange(values);
};
Index.js
import React from "react";
import { render } from "react-dom";
import Styles from "./Styles";
import { Field } from "react-final-form";
import Wizard from "./Wizard";
const sleep = ms => new Promise(resolve => setTimeout(resolve, ms));
const onSubmit = async values => {
await sleep(300);
window.alert(JSON.stringify(values, 0, 2));
};
const Error = ({ name }) => (
<Field
name={name}
subscribe={{ touched: true, error: true }}
render={({ meta: { touched, error } }) =>
touched && error ? <span>{error}</span> : null
}
/>
);
const required = value => (value ? undefined : "Required");
let data = {};
class App extends React.Component {
constructor(props) {
super(props);
this.state = {};
this.onStateChange = this.onStateChange.bind(this);
}
onStateChange = values => {
this.setState({ data: values });
console.log(values);
};
render() {
return (
<Styles>
<h1> React Final Form Example</h1>
<h2>Wizard Form</h2>
<a href="https://github.com/erikras/react-final-form#-react-final-form">
Read Docs
</a>
<p>
Notice the mixture of field-level and record-level (or{" "}
<em>page-level</em> in this case) validation.
</p>
<Wizard
initialValues={{}}
onStateChange={this.onStateChange}
onSubmit={onSubmit}
>
<Wizard.Page>
<div>
<label>First Name</label>
<Field
name="firstName"
component="input"
type="text"
placeholder="First Name"
validate={required}
/>
<Error name="firstName" />
</div>
<div>
<label>Last Name</label>
<Field
name="lastName"
component="input"
type="text"
placeholder="Last Name"
validate={required}
/>
<Error name="lastName" />
</div>
</Wizard.Page>
<Wizard.Page
validate={values => {
const errors = {};
if (!values.notes) {
errors.notes = "Required";
}
return errors;
}}
>
<div>
<label>Best Stooge?</label>
<div>
<label>
<Field
name="stooge"
component="input"
type="radio"
value="larry"
/>{" "}
Larry
</label>
<label>
<Field
name="stooge"
component="input"
type="radio"
value="moe"
/>{" "}
Moe
</label>
<label>
<Field
name="stooge"
component="input"
type="radio"
value="curly"
/>{" "}
Curly
</label>
</div>
</div>
<div>
<label>Notes</label>
<Field name="notes" component="textarea" placeholder="Notes" />
<Error name="notes" />
</div>
</Wizard.Page>
<Wizard.Page>
<div>
<p>
<b>Display all previous values here for user verification </b>
<br />
<i>{JSON.stringify(this.state.data, 0, 2)}</i>
</p>
</div>
</Wizard.Page>
</Wizard>
</Styles>
);
}
}
render(<App />, document.getElementById("root"));