import React from 'react';
import { Table } from 'antd';

class TableExple extends React.Component {

  render () {
    const columns = [
      { title: 'Name', dataIndex: 'name', key: 'name' },
      { title: 'Age', dataIndex: 'age', key: 'age' },
      { title: 'Address', dataIndex: 'address', key: 'address' },
    ];

    const data = [
      {
        key: 1, name: 'John Brown', age: 32, address: 'New York No. 1 Lake Park', description: 'My name is John Brown, I am 32 years old, living in New York No. 1 Lake Park.',
      },
      {
        key: 2, name: 'Jim Green', age: 42, address: 'London No. 1 Lake Park', description: 'My name is Jim Green, I am 42 years old, living in London No. 1 Lake Park.',
      },
      {
        key: 3, name: 'Joe Black', age: 32, address: 'Sidney No. 1 Lake Park', description: 'My name is Joe Black, I am 32 years old, living in Sidney No. 1 Lake Park.',
      },
    ];

    return (
      <div>
        <Table
    columns={columns}
    expandedRowRender={record => <p style={{ margin: 0 }}>{record.description}</p>}
    dataSource={data}
    expandedRowKeys={data.map(item => item.key)}
  />
      </div>
    );
  }
}

export default TableExple;

expandedRowKeys属性加入可以默认展开表格中的子行数，expandedRowKeys的值肯定是要每行唯一的key