antd upload 图片上传1

import { Upload, Icon, Modal, Form } from 'antd';
import React from 'react'

const FormItem = Form.Item;

export default class TestForm extends React.Component  {
  state = {
    previewVisible: false,
    previewImage: '',
    imgList: [],
  };


  handleChange = ({ file, fileList }) => {
    console.log(JSON.stringify(file)); // file 是当前正在上传的 单个 img
    console.log(JSON.stringify(fileList)); // fileList 是已上传的全部 img 列表

    this.setState({
      imgList: fileList,
    });
  };


  handleCancel = () => this.setState({ previewVisible: false });

  handlePreview = file => {
    this.setState({
      previewImage: file.url || file.thumbUrl,
      previewVisible: true,
    });
  };


  // 参考链接：https://www.jianshu.com/p/f356f050b3c9
  handleBeforeUpload = file => {
    //限制图片 格式、size、分辨率
    const isJPG = file.type === 'image/jpeg';
    const isJPEG = file.type === 'image/jpeg';
    const isGIF = file.type === 'image/gif';
    const isPNG = file.type === 'image/png';
    if (!(isJPG || isJPEG || isGIF || isPNG)) {
      Modal.error({
        title: '只能上传JPG 、JPEG 、GIF、 PNG格式的图片~',
      });
      return;
    }
    const isLt2M = file.size / 1024 / 1024 < 2;
    if (!isLt2M) {
      Modal.error({
        title: '超过2M限制，不允许上传~',
      });
      return;
    }
    return (isJPG || isJPEG || isGIF || isPNG) && isLt2M && this.checkImageWH(file);
  };

  //返回一个 promise：检测通过则返回resolve；失败则返回reject，并阻止图片上传
  checkImageWH(file) {
    let self = this;
    return new Promise(function(resolve, reject) {
      let filereader = new FileReader();
      filereader.onload = e => {
        let src = e.target.result;
        const image = new Image();
        image.onload = function() {
          // 获取图片的宽高，并存放到file对象中
          console.log('file width :' + this.width);
          console.log('file height :' + this.height);
          file.width = this.width;
          file.height = this.height;
          resolve();
        };
        image.onerror = reject;
        image.src = src;
      };
      filereader.readAsDataURL(file);
    });
  }

  handleSubmit = e => {
    const { dispatch, form } = this.props;
    e.preventDefault();
    form.validateFieldsAndScroll((err, values) => {// values 是form表单里的参数
      // 点击按钮后，将表单提交给后台
      dispatch({
        type: 'mymodel/submitFormData',
        payload: values,
      });
    });
  };

  render() {
    const { getFieldDecorator } = this.props.form;
    const { previewVisible, previewImage, imgList } = this.state; //  从 state 中拿数据
    const uploadButton = (
      

        
        
Upload
      
    );
    const formItemLayout = {
        labelCol: {span: 5},
        wrapperCol: {span: 16}
    };
    return (
      

        

          
            {getFieldDecorator('myImg')(
               ({ // data里存放的是接口的请求参数
                //   param1: myParam1,
                //   param2: myParam2,
                  photoCotent: file, // file 是当前正在上传的图片
                  photoWidth: file.height, // 通过  handleBeforeUpload 获取 图片的宽高
                  photoHeight: file.width,
                })}
                listType="picture-card"
                fileList={this.state.imgList}
                onPreview={this.handlePreview} // 点击图片缩略图，进行预览
                beforeUpload={this.handleBeforeUpload} // 上传之前，对图片的格式做校验，并获取图片的宽高
                onChange={this.handleChange} // 每次上传图片时，都会触发这个方法
              >
                {this.state.imgList.length >= 9 ? null : uploadButton}
              
            )}
          
        
        
          
        
      
    );
  }
}

TestForm = Form.create({})(TestForm);