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111 lines
2.8 KiB
Markdown
111 lines
2.8 KiB
Markdown
---
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order: 2
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title:
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zh-CN: 表单方法调用（Class component）
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en-US: Form methods (Class component)
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---
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## zh-CN
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我们推荐使用 `Form.useForm` 创建表单数据域进行控制。如果是在 class component 下，你也可以通过 `ref` 获取数据域。
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## en-US
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We recommend use `Form.useForm` to create data control. If you are using class component, you can get it by `ref`.
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```tsx
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import { Form, Input, Button, Select } from 'antd';
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import { FormInstance } from 'antd/lib/form';
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const { Option } = Select;
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const layout = {
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labelCol: { span: 8 },
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wrapperCol: { span: 16 },
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};
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const tailLayout = {
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wrapperCol: { offset: 8, span: 16 },
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};
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class Demo extends React.Component {
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formRef = React.createRef<FormInstance>();
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onGenderChange = value => {
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this.formRef.current.setFieldsValue({
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note: `Hi, ${value === 'male' ? 'man' : 'lady'}!`,
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});
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};
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onFinish = values => {
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console.log(values);
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};
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onReset = () => {
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this.formRef.current.resetFields();
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};
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onFill = () => {
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this.formRef.current.setFieldsValue({
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note: 'Hello world!',
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gender: 'male',
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});
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};
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render() {
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return (
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<Form {...layout} ref={this.formRef} name="control-ref" onFinish={this.onFinish}>
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<Form.Item name="note" label="Note" rules={[{ required: true }]}>
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<Input />
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</Form.Item>
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<Form.Item name="gender" label="Gender" rules={[{ required: true }]}>
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<Select
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placeholder="Select a option and change input text above"
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onChange={this.onGenderChange}
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allowClear
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>
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<Option value="male">male</Option>
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<Option value="female">female</Option>
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<Option value="other">other</Option>
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</Select>
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</Form.Item>
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<Form.Item
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noStyle
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shouldUpdate={(prevValues, currentValues) => prevValues.gender !== currentValues.gender}
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>
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{({ getFieldValue }) => {
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return getFieldValue('gender') === 'other' ? (
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<Form.Item
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name="customizeGender"
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label="Customize Gender"
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rules={[{ required: true }]}
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>
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<Input />
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</Form.Item>
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) : null;
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}}
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</Form.Item>
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<Form.Item {...tailLayout}>
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<Button type="primary" htmlType="submit">
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Submit
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</Button>
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<Button htmlType="button" onClick={this.onReset}>
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Reset
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</Button>
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<Button type="link" htmlType="button" onClick={this.onFill}>
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Fill form
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</Button>
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</Form.Item>
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</Form>
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);
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}
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}
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ReactDOM.render(<Demo />, mountNode);
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```
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```css
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#components-form-demo-control-ref .ant-btn {
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margin-right: 8px;
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}
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```
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