ant-design/components/form/demo/dynamic-form-items.md

---
order: 4.1
title:
  zh-CN: 动态增减嵌套字段
  en-US: Dynamic Form nest Items
---

## zh-CN

嵌套表单字段需要对 `field` 进行拓展，将 `field.name` 和 `field.fieldKey` 应用于控制字段。

## en-US

Nest dynamic field need extends `field`. Pass `field.name` and `field.fieldKey` to nest item.

```jsx
import { Form, Input, Button, Space } from 'antd';
import { MinusCircleOutlined, PlusOutlined } from '@ant-design/icons';

const Demo = () => {
  const onFinish = values => {
    console.log('Received values of form:', values);
  };

  return (
    <Form name="dynamic_form_nest_item" onFinish={onFinish} autoComplete="off">
      <Form.List name="users">
        {(fields, { add, remove }) => (
          <>
            {fields.map(field => (
              <Space key={field.key} style={{ display: 'flex', marginBottom: 8 }} align="baseline">
                <Form.Item
                  {...field}
                  name={[field.name, 'first']}
                  fieldKey={[field.fieldKey, 'first']}
                  rules={[{ required: true, message: 'Missing first name' }]}
                >
                  <Input placeholder="First Name" />
                </Form.Item>
                <Form.Item
                  {...field}
                  name={[field.name, 'last']}
                  fieldKey={[field.fieldKey, 'last']}
                  rules={[{ required: true, message: 'Missing last name' }]}
                >
                  <Input placeholder="Last Name" />
                </Form.Item>
                <MinusCircleOutlined onClick={() => remove(field.name)} />
              </Space>
            ))}
            <Form.Item>
              <Button type="dashed" onClick={() => add()} block icon={<PlusOutlined />}>
                Add field
              </Button>
            </Form.Item>
          </>
        )}
      </Form.List>
      <Form.Item>
        <Button type="primary" htmlType="submit">
          Submit
        </Button>
      </Form.Item>
    </Form>
  );
};

ReactDOM.render(<Demo />, mountNode);
```