如何在antd中为FormItem获取更改后的字段值

import { Form, Input, Button } from 'antd';

const MyForm = () => {
  const [form] = Form.useForm();

  const onFinish = (values) => {
    console.log('Form values:', values);
  };

  const onFieldChange = () => {
    const fieldValue = form.getFieldValue('fieldName');
    console.log('Field value:', fieldValue);
  };

  return (
    <Form form={form} onFinish={onFinish}>
      <Form.Item name="fieldName" label="Field Name">
        <Input onChange={onFieldChange} />
      </Form.Item>
      <Form.Item>
        <Button type="primary" htmlType="submit">
          Submit
        </Button>
      </Form.Item>
    </Form>
  );
};