react+antd系列之Form表单(1)：添加与删除

在用antd的时候，我们如果要对表单进行添加和删除该怎么弄呢，如下：
import { connect } from ‘dva’;
import { Form, Input, Button } from ‘antd’;
import styles from ‘./eg1.css’;

const FormItem = Form.Item;

function Page(props) {
const { form } = props;
const { getFieldDecorator, getFieldValue } = form

// 表单提交
const handleSubmit = (e) => {
e.preventDefault();
form.validateFields((err, values) => {
if (!err) {
console.log(values);
}
});

}

// 添加
const add = () => {
const list = form.getFieldValue(‘list’);
const nextList = list.concat({});
form.setFieldsValue({
list: nextList,
});

}

// 删除
const deleteRow = (index) => {
const list = form.getFieldValue(‘list’);
const content = form.getFieldValue(‘content’);

if (list.length === 1) {
return;
}

form.setFieldsValue({
list: list.filter((item, key) => key !== index),
content: content.filter((item, key) => key !== index),
});

}

getFieldDecorator(‘list’, { initialValue: [{}] });
const list = getFieldValue(‘list’);

const listContent = list.map((item, index) => {
return (
<FormItem label=’名称：’ key={index}>
{getFieldDecorator(`content[${index}].name`, {
rules: [{
required: true,
message: “名称不能为空！”,
}],
})(
<Input placeholder=”请输入名称” style={{ width: ‘60%’, marginRight: 8 }} />
)}

{index > 0 ? (
<Button type=”primary” onClick={deleteRow.bind(this, index)}>删除</Button>
) : null}

</FormItem>
);
});

return (
<div className={styles.normal}>
<Form onSubmit={handleSubmit}>

{listContent}
<FormItem>
<Button type=”primary” htmlType=”submit”>提交</Button>
<Button type=”primary” style={{ marginLeft: ’10px’ }} onClick={add}>增加</Button>
</FormItem>
</Form>

</div>
);
}

const page = Form.create()(Page);
export default connect()(page);

这里不仅能对表单进行增加和删除，还能对表单进行验证，看是否有输入，以上是本身没有数据的情况，如果是有数据的情况如下：
import React from ‘react’;
import { connect } from ‘dva’;
import { Form, Input, Button } from ‘antd’;
import styles from ‘./eg2.css’;

const FormItem = Form.Item;

function Page(props) {
const { form } = props;
const { getFieldDecorator, getFieldValue } = form

// 表单提交
const handleSubmit = (e) => {
e.preventDefault();
form.validateFields((err, values) => {
if (!err) {
console.log(values);
}
});

}

// 添加
const add = () => {
const list = form.getFieldValue(‘list’);
const nextList = list.concat({});
form.setFieldsValue({
list: nextList,
});

}

// 删除
const deleteRow = (index) => {
const list = form.getFieldValue(‘list’);
const content = form.getFieldValue(‘content’);

if (list.length === 1) {
return;
}

form.setFieldsValue({
list: list.filter((item, key) => key !== index),
content: content.filter((item, key) => key !== index),
});

}

const slist = [{
id:’0001′,
name: ‘黎明’
}, {
id:’0002′,
name: ‘晴天’
}]
getFieldDecorator(‘list’, { initialValue: slist });
const list = getFieldValue(‘list’);

const listContent = list.map((item, index) => {
getFieldDecorator(`content[${index}].id`, {initialValue: item.id || ”})
return (
<FormItem label=’名称：’ key={index}>
{getFieldDecorator(`content[${index}].name`, {
rules: [{
required: true,
message: “名称不能为空！”,
}],
initialValue: item.name || ”
})(
<Input placeholder=”请输入名称” style={{ width: ‘60%’, marginRight: 8 }} />
)}

{index > 0 ? (
<Button type=”primary” onClick={deleteRow.bind(this, index)}>删除</Button>
) : null}

</FormItem>
);
});

return (
<div className={styles.normal}>
<Form onSubmit={handleSubmit}>

{listContent}
<FormItem>
<Button type=”primary” htmlType=”submit”>提交</Button>
<Button type=”primary” style={{ marginLeft: ’10px’ }} onClick={add}>增加</Button>
</FormItem>
</Form>

</div>
);
}

const page = Form.create()(Page);
export default connect()(page);

一般如果本身有数据，都会有每行数据的id，但是这个id不显示，我们都会用getFieldDecorator给id声明，这样在我们提交表单的时候，就可以得到表单抓取到id的数据，有数据跟没有数据的差别就是，有数据需要在表单getFieldDecorator的时候给一个初始值，其他两者都一样
具体代码下载地址：https://gitee.com/hope93/antd…