还是拿代码来讲吧，详情见注释

子组件

import React, { Component } from 'react';
import { Form, Input } from 'antd';
const FormItem = Form.Item;
class Forms extends Component{
    getItemsValue = ()=>{    //3、自定义方法，用来传递数据（需要在父组件中调用获取数据）
        const valus= this.props.form.getFieldsValue();       //4、getFieldsValue：获取一组输入控件的值，如不传入参数，则获取全部组件的值
        return valus;
    }
    render(){
        const { form } = this.props;
        const { getFieldDecorator } = form;    //1、将getFieldDecorator 解构出来，用于和表单进行双向绑定
        return(
            <>
                <Form layout="vertical">
                    <FormItem label="姓名">
                        {getFieldDecorator('name')(    //2、getFieldDecorator 的使用方法，这种写法真的很蛋疼
                            <Input />
                        )}
                    </FormItem>
                    <FormItem label="年龄">
                        {getFieldDecorator('age')(
                            <Input />
                        )}
                    </FormItem>
                    <FormItem label="城市">
                        {getFieldDecorator('address')(
                            <Input />
                        )}
                    </FormItem>
                </Form>
            </>
        )
    }
}
export default Form.create()(Forms);        //创建form实例

getFieldDecorator 的具体参数见官方文档)

父组件

import React, { Component } from 'react';
import { Modal } from 'antd';
import Forms from './Forms'
export default class Modals extends Component {
    handleCancel = () => {
        this.props.closeModal(false);
    }
    handleCreate = () => {
        console.log(this.formRef.getItemsValue());     //6、调用子组件的自定义方法getItemsValue。注意：通过this.formRef 才能拿到数据
        this.props.getFormRef(this.formRef.getItemsValue());
        this.props.closeModal(false);
    }
    render() {
        const { visible } = this.props;
        return (
            <Modal
                visible={visible}
                title="新增"
                okText="保存"
                onCancel={this.handleCancel}
                onOk={this.handleCreate}
            >
            <Forms
                wrappedComponentRef={(form) => this.formRef = form}       //5、使用wrappedComponentRef 拿到子组件传递过来的ref（官方写法）
            />
            </Modal>
        );
    }
}

官方文档

class CustomizedForm extends React.Component { ... }
// use wrappedComponentRef
const EnhancedForm = Form.create()(CustomizedForm);
<EnhancedForm wrappedComponentRef={(form) => this.form = form} />
this.form // => The instance of CustomizedForm