antd自定义upload组件在Form中使用

直接贴代码：

import React, { useState, useEffect, forwardRef } from 'react';
import { Upload, Icon, Modal, message } from 'antd';
import config from '@/config';

// 使用forwardRef是为了在Form中拿到ref
const CustomUpload = forwardRef((props, _ref) => {
  const [previewVisible, setPreviewVisible] = useState(false);
  const [previewImage, setPreviewImage] = useState('');
  const [fileList, setFileList] = useState([]);

  useEffect(() => {
    setPreviewImage(props.previewImage);
    setFileList(props.fileList);
  }, [props]);

  useEffect(() => {
    if (props.fileString) {
      receiveImg(props.fileString);
    }
  }, [props.fileString]);

  const beforeUpload = file => {
    return new Promise(function (resolve, reject) {
      const isLt2M = file.size / 1024 / 1024 < 2;
      if (!isLt2M) {
        message.error('图片最大2M!');
        reject(false);
      } else {
        resolve(file);
      }
    });
  };

  const receiveImg = url => {
    let _fileList = [];
    if (url) {
      url.split(',').forEach((element, index) => {
        if (element) {
          _fileList.push({
            url: element,
            status: 'done',
            uid: index,
          });
        }
      });
      setFileList(_fileList);
    }
  };

  const handlePreview = file => {
    setPreviewImage(file.url || file.thumbUrl);
    setPreviewVisible(true);
  };

  const uploadButton = (
    <div>
      <Icon type='plus' />
      <div className='ant-upload-text'>上传图片</div>
    </div>
  );

  return (
    <div className='clearfix'>
      <Upload
        action={config.imgUpload}
        accept='image/*'
        listType='picture-card'
        beforeUpload={e => beforeUpload(e)}
        withCredentials={props.withCredentials || false}
        fileList={fileList}
        onPreview={e => handlePreview(e)}
        onChange={e => props.onChange(e)}
      >
        {fileList.length >= 1 ? null : uploadButton}
      </Upload>
      <Modal visible={previewVisible} footer={null} onCancel={() => setPreviewVisible(false)}>
        <img alt='logo' style={{  '100%' }} src={previewImage} />
      </Modal>
    </div>
  );
});

export default CustomUpload;

使用时：

import CustomUpload from '@/components/CustomUpload'
...
...
class SomeComponent extends Component {
      constructor(props) {
            super(props)
            this.state = {
                  ...,
                  image: '',
                  imageList: [],
            },
      }
     handleUploadChange = ({ file, fileList }) => {
          this.setState({ imgList: fileList });
          if (!!fileList && fileList.length && fileList[0].hasOwnProperty('response')) {
            if (!!fileList[0].response && fileList[0].response.success) {
              this.setState({ image: fileList[0].response.data });
            }
          }
      };
      render () {
            const { image, imageList } = this.state;
            ...
            <Form.Item label='照片' extra='请上传2MB内的图片' {...formItemLayout}>
              {getFieldDecorator('image', {
                getValueFromEvent: info => {
                  console.log(info);
                  return info.file && info.file.response;
                },
                required: true,
                message: '请上传图片',
              })(
                <CustomUpload
                  fileList={imgList}
                  previewImage={this.props.form.getFieldValue('image')}
                  withCredentials={true}
                  onChange={this.handleUploadChange}
                />
              )}
            </Form.Item>
      }
}