node.js - ant-design的组件报错 getFieldDecorator不是function

到页面上展示：

报错：
sampleInfoForm.js:205Uncaught TypeError: getFieldDecorator is not a function
原因是什么呢？？

PS.我是抄antdesign的Form 动态增减表单项的demo报错的

代码：

import React from 'react'
import {render} from 'react-dom'



let uuid = 0;
//注意formClass的名称和var TalentUserAddForm = Form.create()(formClass);的TalentUserAddForm不能一样
 let formClass = React.createClass({
  componentWillMount() {
    this.props.form.setFieldsValue({
      keys: [0],
    });
  },
  remove(k) {
    const { form } = this.props;
    // can use data-binding to get
    const keys = form.getFieldValue('keys');
    const nextKeys = keys.filter((key) => {
      return key !== k;
    });
    // can use data-binding to set
    form.setFieldsValue({
      keys: nextKeys,
    });
  },
  add() {
    uuid++;
    const { form } = this.props;
    // can use data-binding to get
    const keys = form.getFieldValue('keys');
    const nextKeys = keys.concat(uuid);
    // can use data-binding to set
    // important! notify form to detect changes
    form.setFieldsValue({
      keys: nextKeys,
    });
  },
  
  render() {

   const { getFieldDecorator, getFieldValue } = this.props.form;
   console.log(getFieldDecorator);
   const formItems = getFieldValue('keys').map((k) => {
      return (
        

            

           this.remove(k)}>remove
        
      );
    });
   
 
    return (
      

        
              取 消
            ,
            
              确 定
            ,
          ]}
        >
          

          {formItems}
        
          add good friend
         
      
           
          
        
      

    );
  },  

});

var PostForm = Form.create()(formClass);

module.exports = PostForm;