---
order: 5
title:
zh-CN: 动态增减表单项
en-US: Dynamic Form Item
---
## zh-CN
动态增加、减少表单项。
## en-US
Add or remove form items dynamically.
````jsx
import {
Form, Input, Icon, Button,
} from 'antd';
const FormItem = Form.Item;
let id = 0;
class DynamicFieldSet extends React.Component {
remove = (k) => {
const { form } = this.props;
// can use data-binding to get
const keys = form.getFieldValue('keys');
// We need at least one passenger
if (keys.length === 1) {
return;
}
// can use data-binding to set
form.setFieldsValue({
keys: keys.filter(key => key !== k),
});
}
add = () => {
const { form } = this.props;
// can use data-binding to get
const keys = form.getFieldValue('keys');
const nextKeys = keys.concat(++id);
// can use data-binding to set
// important! notify form to detect changes
form.setFieldsValue({
keys: nextKeys,
});
}
handleSubmit = (e) => {
e.preventDefault();
this.props.form.validateFields((err, values) => {
if (!err) {
console.log('Received values of form: ', values);
}
});
}
render() {
const { getFieldDecorator, getFieldValue } = this.props.form;
const formItemLayout = {
labelCol: {
xs: { span: 24 },
sm: { span: 4 },
},
wrapperCol: {
xs: { span: 24 },
sm: { span: 20 },
},
};
const formItemLayoutWithOutLabel = {
wrapperCol: {
xs: { span: 24, offset: 0 },
sm: { span: 20, offset: 4 },
},
};
getFieldDecorator('keys', { initialValue: [] });
const keys = getFieldValue('keys');
const formItems = keys.map((k, index) => (