使用formio和react实现在线表单设计

formiojs 是一个开源的在线表单设计工具，今天看看怎样在 react js 中使用 formiojs。

首先创建一个react工程

npx create-react-app my-react-formio-app

安装依赖

cd my-react-formio-app
npm install @formio/react
npm install @formio/js

另外，考虑样式等问题，还安装了下面几个依赖包

npm install bootstrap 
npm install react18-json-view
npm install react-bootstrap
npm install font-awesome

创建组件

这里创建一个简单的页面组件，主要包括三部分，第一部分是表单设计器，第二部分是表单预览，第三部分是表单JSON数据。

在 src 下创建文件 MyBuilder.js，内容如下：

import { FormBuilder, Form } from "@formio/react";
import { useState } from "react";
import ReactJson from "react18-json-view";
import { Container, Row, Col, Button, Accordion } from "react-bootstrap";const MyBuilder = () => {const [jsonSchema, setSchema] = useState({ components: [] });const onFormChange = (schema) => {setSchema({ ...schema, components: [...schema.components] });};const handleSubmit = (data) => {console.log(data);}return (<><Container><Row><Col ><Accordion defaultActiveKey="0"><Accordion.Item eventKey="0"><Accordion.Header>Builder</Accordion.Header><Accordion.Body><FormBuilder form={jsonSchema} onChange={onFormChange} /></Accordion.Body></Accordion.Item></Accordion></Col></Row><Row><Col ><Accordion defaultActiveKey="0"><Accordion.Item eventKey="0"><Accordion.Header>Form</Accordion.Header><Accordion.Body><Form form={jsonSchema} onSubmit={handleSubmit} /></Accordion.Body></Accordion.Item></Accordion></Col></Row><Row><Col ><Accordion defaultActiveKey="0"><Accordion.Item eventKey="0"><Accordion.Header>JSON Schema</Accordion.Header><Accordion.Body><ReactJson src={jsonSchema} name={null} collapsed={true}></ReactJson></Accordion.Body></Accordion.Item></Accordion></Col></Row></Container></>);
};export default MyBuilder;

导入并渲染自定义组建

修改 src/App.js 文件，内容如下：

import React from 'react';
import MyBuilder from './MyBuilder';import 'font-awesome/css/font-awesome.min.css';
import 'bootstrap/dist/css/bootstrap.min.css';
import '@formio/js/dist/formio.full.min.css';
import './App.css';function App() {return (<div className="App"><MyBuilder /></div>);
}export default App;