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    【已解决】ReactJS中如何上传照片和查看照片

    ReactJS crifan 4501浏览 0评论

    Reactjs的项目中，想要实现：

    上传照片和查看照片

    且点击单张照片可以全屏查看大图。可以不支持缩放查看。

    希望先去调研，如果可以的话，尽量用H5页面实现这些功能

    刚巧最近看到微信的weui，如果可以用的话，还是很不错的。

    WeUI

    -》

    weui/weui.js: A lightweight javascript library for WeUI.

    且刚去手机端预览：

    https://weui.io/weui.js/

    用Android端的浏览器打开的效果很赞：

    示例代码：

    weui.js/uploader.md at master · weui/weui.js

    然后就是先去：

    【已解决】ReactJS中集成weui

    然后就是去：

    尽量用react-weui的uploader去实现移动端的文件上传了。

    然后用代码：

    // import { Page, Gallery, GalleryDelete, Uploader, Form, Cell, CellBody } from ‘react-weui’;
    import { Gallery, GalleryDelete, Uploader } from ‘react-weui’;
    // import photoSrc from ‘../../../assets/photo.png’;
    // import thumbSrc from ‘../../../assets/thumb.png’;
    import imgCow1 from ‘../../../assets/cow_1.jpg’;
    import imgCow2 from ‘../../../assets/cow_2.jpg’;
    import imgCow3 from ‘../../../assets/cow_3.jpg’;
    import imgCow4 from ‘../../../assets/cow_4.jpg’;
    export default class CowEditAdd extends Component {
        gallery: false,
        demoFiles : [
          {
            url: imgCow1
          },
          {
            url: imgCow2,
            status: ‘38%’
          }
          // {
          //   url: imgCow4
          // }
          // {
          //   url: thumbSrc
          // },
          // {
          //   url: thumbSrc
          // },
          // {
          //   url: thumbSrc
          // },
          // {
          //   url: photoSrc,
          //   error: true
          // },
          // {
          //   url: thumbSrc,
          //   status: ‘50%’
          // }
        ]
      };
      renderGallery(){
        if (!this.state.gallery) return false;
        let srcs = this.state.demoFiles.map(file=>file.url);
    // defaultIndex={this.state.gallery.id}
        return (
            <Gallery
              src={srcs}
              show
              defaultIndex={0}
              onClick={(e)=> {
                console.log(e);
                //avoid click background item
                e.preventDefault();
                e.stopPropagation();
                this.setState({gallery: false});
              }}
            >
              <GalleryDelete onClick={(e, id)=> {
                this.setState({
                  demoFiles: this.state.demoFiles.filter((e,i)=>i !== id),
                  gallery: this.state.demoFiles.length <= 1 ? true : false
                });
              }} />
            </Gallery>
        );
      }
      render() {
        return (
    。。。
              <ul class={style.uploadImage}>
                {this.renderGallery()}
                <Uploader
                  title="牛只照片（左-中-右）"
                  maxCount={3}
                  maxWidth={720}
                  files={this.state.demoFiles}
                  onError={msg => alert(msg)}
                  onChange={(file, e) => {
                    console.log("Uploader onChange", file, e);
                    let newFiles = […this.state.demoFiles, {url:file.data}];
                    this.setState({
                      demoFiles: newFiles
                    });
                  }}
                  onFileClick={
                      (e, file, i) => {
                        console.log(‘file click’, file, i);
                        this.setState({
                          gallery: {
                            url: file.url,
                            id: i
                          }
                        });
                      }
                  }
                  lang={{
                    maxError: maxCount => `最多只允许上传${maxCount}张图片`
                  }}
                />
              </ul>
          </div>
        );
      }
    }
              //  <Page className="cell" title="Uploader" subTitle="上传组件，一般配合Gallery使用">
              //   { this.renderGallery() }
                // <Form>
                //   <Cell>
                //     <CellBody>
                //     </CellBody>
                //   </Cell>
                // </Form>
              //  </Page>

    css：style.less

    // .cows_n_box ul.uploadImage {
    //   position: relative;
    //   height: 1.8rem;
    //   border-bottom: none;
    //   // > ul{
    //   //   border-bottom: none;
    //   // }
    // }
    .uploadImage {
      position: relative;
      height: 2.46rem !important;
      border: none !important;
    }
    // .uploadImage {
    //   position: relative;
    //   height: 1.8rem;
    //   border: none;
    // }
    // .cows_n_box ul {
    //   .uploadImage {
    //     position: relative;
    //     height: 1.8rem;
    //     border: none;
    //   }
    // }
    //for weui-uploader__files
    // ul.weui-uploader__files{
    // .weui-uploader__files{
    .cows_n_box ul div div ul {
        position: relative;
        height: 0.001rem !important;
        border-bottom: none !important;
    }
    //weui-uploader__file
    .cows_n_box ul div div ul li {
        // padding: 0.1rem 0.66rem 0.1rem 1.3rem;
      padding: 0 !important;
    }

    然后实际测试出来的效果是：

    1.gallery问题很多

    （1）gallery有bug，或者是使用上有问题，不能滑动到下一张图片

    第一张之后的图片是黑色背景，无法显示

    （2）且gallery中删除图标也看不到。

    （3）图片自动压缩也不起效果-》设置了maxWidth无效，导入的图片还是原图

    2.没法选择上传照片 + 在部分手机上无法调用拍照功能

    Android手机上，官网的demo中，点击+，是可以弹出：

    选择照片和拍照的

    但是真机上：

    部分android手机（锥子M1L，iPhone6），直接进入拍照功能

    部分android手机（VIVO Y51A，Huawei TIT-CL00），都无法使用拍照功能

    【总结】

    所以，总体上来说，和官网的demo，差异还是很大，问题还是不少的。

    所以，放弃了直接使用weui中的uploader去上传文件。还是自己去手动实现吧。

    【后记1】

    然后也去找相关的库：

    react.js uploader

    lionng429/react-file-uploader: A set of file-upload-components with React.js.

    是拖放上传的。不符合此处期望，放弃

    aleksei0807/react-images-uploader: React.js component for uploading images to the server

    好像还有可能用用试试。

    SoAanyip/React-FileUpload: Upload files async with xhr2 or iframe for IE. Supporting IE8+. React component.

    不清楚，看起来不够好。

    react js image uploader

    Image Upload and Manipulation with React | CSS-Tricks

    也是拖放上传。

    reactjs – How to upload an image in React JS? – Stack Overflow

    Image upload with ReactJS – Stack Overflow

    react js image upload

    Upload Image File Component Fun

    Image uploading with React.js, Node.js, and AWS S3

    jquery – Upload File Component with ReactJS – Stack Overflow

    【后记2】

    【记录】尝试去用H5实现弹出选择相机还是相册的方式实现图片文件上传

    【总结】

    所以还是只能放弃H5页面的上传照片的方式了。

    只能想办法，让iOS和android开发人员去实现选择和上传照片的功能，然后自己只是负责H5页面缩略图显示和点击后图片查看的功能了。

    最后是别人写好了html+css，然后自己整合进来，再调用原生app的接口去实现图片上传的

    reactjs部分的代码如下：

    const COW_IMG_TYPE = {
      LEFT: "left",
      MIDDLE: "middle",
      RIGHT: "right"
    };
    export default class CowEditAdd extends Component {
      state = {
        cowImgLeft: {
          "isAdded" : false,
          "thumbnailUrl" : "",
          "originUrl" : ""
        },
        cowImgMiddle: {
          "isAdded" : false,
          "thumbnailUrl" : "",
          "originUrl" : ""
        },
        cowImgRight: {
          "isAdded" : false,
          "thumbnailUrl" : "",
          "originUrl" : ""
        }
      getCowImgObjFromType(cowImgType){
        let cowImgObj = null;
        if (cowImgType === COW_IMG_TYPE.LEFT){
          cowImgObj = this.state.cowImgLeft;
        } else if (cowImgType === COW_IMG_TYPE.MIDDLE){
          cowImgObj = this.state.cowImgMiddle;
        } else if (cowImgType === COW_IMG_TYPE.RIGHT){
          cowImgObj = this.state.cowImgRight;
        }
        console.log(`getCowImgObjFromType: ${cowImgType} -> ${JSON.stringify(cowImgObj)}`);
        return cowImgObj;
      }
      onCowImgBoxClick(cowImgType){
        console.log(`onCowImgBoxClick: cowImgType=${cowImgType}`);
        toast(`点击了${cowImgType}牛只照片`);
        let cowImgObj = this.getCowImgObjFromType(cowImgType);
        if (cowImgObj) {
          if (cowImgObj.isAdded) {
            this.showCowImage(cowImgType);
          } else {
            let cowCode = "";
            if (this.props.type === COW_ACTION_TYPE.EDIT) {
              cowCode = this.state.cowCode;
            } else if (this.props.type === COW_ACTION_TYPE.ADD) {
              cowCode = "";
            }
            this.uploadCowImg(cowCode, cowImgType);
          }
        }
      }
      showCowImage(cowImgType){
        console.log(`showCowImage: cowImgType=${cowImgType}`);
        // toast(`显示牛只${cowImgType}照片`);
        let cowImgObj = this.getCowImgObjFromType(cowImgType);
        if (cowImgObj) {
          let gallery = weui.gallery(cowImgObj.originUrl, {
            className: ‘cowImageGallary’,
            onDelete: () => {
              gallery.hide(() => {});
              this.deleteCowImage(cowImgType);
            }
          });
        }
      }
      uploadCowImg(cowCode, cowImgType){
        console.log(`uploadCowImg: cowCode=${cowCode}, cowImgType=${cowImgType}`);
        toast(`上传牛只 ${cowCode} ${cowImgType}照片`, 2000);
        // console.log(window);
        console.log(window.AppHost);
        if (window.AppHost !== undefined) {
          console.log(window.AppHost.uploadCowImage);
          //Native(iOS/Android) uploadCowImage(cowCode, cowImageType)
          window.AppHost.uploadCowImage(cowCode, cowImgType);
        }
        else {
          // toast(‘找不到支持上传牛只图片的功能’);
          //for debug
          let debugImgUrl = "";
          // debugImgUrl = "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1502094214839&di=e08c056c667c3c27e672a4f240da1675&imgtype=0&src=http%3A%2F%2Fimgsrc.baidu.com%2Fimage%2Fc0%253Dshijue1%252C0%252C0%252C294%252C40%2Fsign%3D79c5c60e8c18367ab984779e461ae1a1%2Fdbb44aed2e738bd47a88b916ab8b87d6277ff968.jpg";
          debugImgUrl = "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1502084214262&di=3ff4eca5cc6d4c384a83e09877006772&imgtype=0&src=http%3A%2F%2Fimgsrc.baidu.com%2Fimgad%2Fpic%2Fitem%2F023b5bb5c9ea15ce94e6792cbc003af33a87b28f.jpg";
          // debugImgUrl = "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1502096249512&di=7549c67f02f48ac9f0730bf7437cd356&imgtype=0&src=http%3A%2F%2Fcdn.duitang.com%2Fuploads%2Fitem%2F201411%2F06%2F20141106222213_WBZa8.thumb.700_0.jpeg";
          // debugImgUrl = "https://timgsa.baidu.com/timg?image&quality=80&size=b10000_10000&sec=1502074137&di=79361fb1a9244c3d6d98f96fb728ce12&src=http://www.1866.tv/Upload_Map/2015nian/10/20/2015-10-20-14-02-46352.jpg";
          // debugImgUrl = "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1502096360787&di=b1c39bb12683e9f6235d1be496dc04aa&imgtype=0&src=http%3A%2F%2Fpic.qjimage.com%2Fchineseview077%2Fhigh%2F75-19421.jpg";
          let uploadResultJsonStr = `
      {
        "isUploaded" : true,
        "cowInfo" : {
          "cowImageType" : "left",
          "originUrl" : "${debugImgUrl}",
          "thumbnailUrl" : "${debugImgUrl}"
        }
      }
      `;
          this.uploadCowImageCallback(uploadResultJsonStr);
        }
      }
      //Native(iOS/Android)uploadCowImageCallback(String uploadResultJsonStr);
      uploadCowImageCallback(uploadResultJsonStr){
        console.log(`uploadCowImageCallback: uploadResultJsonStr=${uploadResultJsonStr}`);
        weui.alert(uploadResultJsonStr);
        let uploadResultDict = JSON.parse(uploadResultJsonStr);
        console.log(uploadResultDict);
        if (uploadResultDict.isUploaded){
          let cowImgType = uploadResultDict.cowInfo.cowImageType;
          toast(`cowType=${uploadResultDict.cowInfo.cowImageType}`);
          if (cowImgType === COW_IMG_TYPE.LEFT){
            this.setState({
              cowImgLeft : {
                "isAdded" : true,
                "originUrl" : uploadResultDict.cowInfo.originUrl,
                "thumbnailUrl" : uploadResultDict.cowInfo.thumbnailUrl
              }
            });
          } else if (cowImgType === COW_IMG_TYPE.MIDDLE){
            this.setState({
              cowImgMiddle : {
                "isAdded" : true,
                "originUrl" : uploadResultDict.cowInfo.originUrl,
                "thumbnailUrl" : uploadResultDict.cowInfo.thumbnailUrl
              }
            });
          } else if (cowImgType === COW_IMG_TYPE.RIGHT){
            this.setState({
              cowImgRight : {
                "isAdded" : true,
                "originUrl" : uploadResultDict.cowInfo.originUrl,
                "thumbnailUrl" : uploadResultDict.cowInfo.thumbnailUrl
              }
            });
          }
        } else {
          toast("上传图片失败!");
        }
      }
      onCowImgLeftBoxClick(){
        this.onCowImgBoxClick(COW_IMG_TYPE.LEFT);
      }
      onCowImgMiddleBoxClick(){
        this.onCowImgBoxClick(COW_IMG_TYPE.MIDDLE);
      }
      onCowImgRightBoxClick(){
        this.onCowImgBoxClick(COW_IMG_TYPE.RIGHT);
      }
      doDeleteCowImg(cowImgType){
        console.log(`doDeleteCowImg: cowImgType=${cowImgType}`);
        //TODO: call api to delete cow image
        toast(`删除牛只${cowImgType}照片`);
        //for debug
        if (cowImgType === COW_IMG_TYPE.LEFT){
          this.setState({
            cowImgLeft : {
              "isAdded" : false,
              "originUrl" : "",
              "thumbnailUrl" : ""
            }
          });
        } else if (cowImgType === COW_IMG_TYPE.MIDDLE){
          this.setState({
            cowImgMiddle : {
              "isAdded" : false,
              "originUrl" : "",
              "thumbnailUrl" : ""
            }
          });
        } else if (cowImgType === COW_IMG_TYPE.RIGHT){
          this.setState({
            cowImgRight : {
              "isAdded" : false,
              "originUrl" : "",
              "thumbnailUrl" : ""
            }
          });
        }
      }
      deleteCowImage(cowImgType){
        console.log(`deleteCowImage: cowImgType=${cowImgType}`);
        let cowImgTypeStr = "";
        if (cowImgType === COW_IMG_TYPE.LEFT){
          cowImgTypeStr = "左";
        } else if (cowImgType === COW_IMG_TYPE.MIDDLE){
          cowImgTypeStr = "中";
        } else if (cowImgType === COW_IMG_TYPE.RIGHT){
          cowImgTypeStr = "右";
        }
        let deleteImgDialog = weui.dialog({
          title: ‘确认要删除牛只’ + cowImgTypeStr + ‘照片？’,
          content: ”,
          // className: ‘custom-classname’,
          buttons: [{
            label: ‘取消’,
            type: ‘default’,
            onClick: () => {
              console.log("取消删除", deleteImgDialog);
              deleteImgDialog.hide(() => {});
            }
          }, {
            label: ‘确定’,
            type: ‘primary’,
            onClick: () => {
              console.log("确定删除", deleteImgDialog);
              deleteImgDialog.hide(() => {});
              this.doDeleteCowImg(cowImgType);
            }
          }]
        });
      }
      onDeleteClick(cowImgType, e){
        console.log(`onDeleteClick: cowImgType=${cowImgType}`);
        // e.preventDefault();
        e.stopPropagation();
        e.nativeEvent.stopImmediatePropagation();
        this.deleteCowImage(cowImgType);
      }
      onLeftDeleteClick(e){
        this.onDeleteClick(COW_IMG_TYPE.LEFT, e);
      }
      onMiddleDeleteClick(e){
        this.onDeleteClick(COW_IMG_TYPE.MIDDLE, e);
      }
      onRightDeleteClick(e){
        this.onDeleteClick(COW_IMG_TYPE.RIGHT, e);
      }
      render() {
        return (
          <div class={style.content_div}>
            <div class={style.cows_n_box}>
              <dl>
                <dt>牛只照片（左-中-右）</dt>
                <dd  class={style.clearfix}>
                  <div class={this.state.cowImgLeft.isAdded ? style.nz_tp_box_noImgBkg : style.nz_tp_box_addImgBkg} onClick={this.onCowImgLeftBoxClick} >
                    {this.state.cowImgLeft.isAdded ? (<img src={this.state.cowImgLeft.thumbnailUrl} />) : (null)}
                    {this.state.cowImgLeft.isAdded ? (<i onClick={this.onLeftDeleteClick} />) : (null)}
                  </div>
                  <div class={this.state.cowImgMiddle.isAdded ? style.nz_tp_box_noImgBkg : style.nz_tp_box_addImgBkg} onClick={this.onCowImgMiddleBoxClick} >
                    {this.state.cowImgMiddle.isAdded ? (<img src={this.state.cowImgMiddle.thumbnailUrl} />) : (null)}
                    {this.state.cowImgMiddle.isAdded ? (<i onClick={this.onMiddleDeleteClick} />) : (null)}
                  </div>
                  <div class={this.state.cowImgRight.isAdded ? style.nz_tp_box_noImgBkg : style.nz_tp_box_addImgBkg} onClick={this.onCowImgRightBoxClick} >
                    {this.state.cowImgRight.isAdded ? (<img src={this.state.cowImgRight.thumbnailUrl} />) : (null)}
                    {this.state.cowImgRight.isAdded ? (<i onClick={this.onRightDeleteClick} />) : (null)}
                  </div>
                </dd>
                      </dl>
    css部分：
    .cows_n_box dl {
      height: 2.53rem;
        position: relative;
        padding: 0.16rem 0.3rem;
        border-bottom: 1px solid #cccac9;
    }
    .cows_n_box dl dt {
      line-height: 0.6rem;
      font-size: 0.3rem;
      color: #272727;
      font-weight: normal;
    }
    .cows_n_box dl dd {
      padding: 0.2rem 0 0.15rem;
      clear: both;
    }
    .nz_tp_box_common {
      width: 1.24rem;
      height: 1.24rem;
      position: relative;
      display: inline-block;
      float: left;
      margin-right: 0.5rem;
        background-size: 1.24rem 1.24rem;
        box-sizing: border-box;
    }
    .addImgBkg{
      background: url("@{env-prefix}/assets/nz_add_bg.png") center center no-repeat;
    }
    .noImgBkg{
      background: url("@{env-prefix}/assets/nz_tp_bg.png") center center no-repeat;
    }
    .nz_tp_box_addImgBkg{
      .addImgBkg;
      .nz_tp_box_common;
    }
    .nz_tp_box_noImgBkg{
      .noImgBkg;
      .nz_tp_box_common;
    }
    // .nz_tp_box img {
    .nz_tp_box_noImgBkg img{
      max-height: 100%;
      max-width: 100%;
      width: auto;
      height: auto;
      position: absolute;
      top: 0;
      bottom: 0;
      left: 0;
      right: 0;
      margin: auto;
    }
    // .nz_tp_box i {
    .nz_tp_box_noImgBkg i {
      position: absolute;
      display: inline-block;
      width: 0.5rem;
      height: 0.5rem;
      top: -0.25rem;
      right:-0.25rem;
      // background: url(../images/nz_close.png) no-repeat;
      background: url("@{env-prefix}/assets/nz_close.png") no-repeat;
      background-size: 0.5rem 0.5rem;
    }

    效果：

    后面的事情，就是和原生app去联合调试，完善代码，去调用后台API接口去delete图片了。

    转载请注明：在路上 » 【已解决】ReactJS中如何上传照片和查看照片

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