Ant-design-vue中如何实现图片上传？

Posted 2022-09-08 尔嵘

        上传是将信息（网页、文字、图片、视频等）通过网页或者上传工具发布到远程服务器上的过程。如何使用Ant-design-vue中的 a-upload 上传组件进行图片或者视频的上传呢？

template中:

<a-form-model-item label="图片" prop="sheetPicture">
    <div style="display: flex; align-items: center">
        <a-upload name="avatar" class="avatar-uploader" action :customRequest="uploadImage" list-type="picture-card" :file-list="fileList" :show-file-list="false" :before-upload="beforeUpload" :remove="handleDeleteChange" accept=".jpg,.JPG,.jpeg,.JPEG,.png,.PNG,.gif,.GIF">
            <div v-if="!defectSearchForm.sheetPicture">
                <a-icon type="plus" />
                <div class="ant-upload-text">上传</div>
            </div>
            <img v-else :src="defectSearchForm.sheetPicture" alt="avatar" />
        </a-upload>
        <a-tooltip placement="right">
            <template slot="title">
                <span>上传前请确认无误后再进行上传或删除操作</span>
            </template>
            <a-icon type="info-circle" />
        </a-tooltip>
     </div>
</a-form-model-item>

js中：

定义data：

data()
    return 
        loading: false,
        fileList: [],
        defectSearchForm: ,

    

详情信息获取：

//根据id查询缺陷详情 (根据id获取详情的API getDefectSearchById)
    getDefectSearchInfoById(id) 
      let _this = this;
      getDefectSearchById(id)
        .then(( data: res ) => 
          if (res.code != 0) 
            _this.$message.config(
              maxCount: 1,
            );
            _this.$message.destroy();
            return _this.$message.error(res.data);
          
          console.log('缺陷详情', res);
          if (JSON.stringify(res.data) != '') 
            _this.defectSearchForm = res.data;
            if (_this.defectSearchForm.sheetPicture) 
              _this.fileList = [
                
                  uid: '-1',
                  name: 'image.png',
                  status: 'done',
                  url: _this.defectSearchForm.sheetPicture
                
              ];
             else 
              _this.fileList = [];
            
          
        )
        .catch((error) => 
          console.log(error);
          return false;
        );
    ,

图片上传部分：

    //图片上传(上传图片API updateImage: '/sys/oss/upload')
    uploadImage(file) 
      let _this = this,
        data = file.file,
        fileParams = new FormData();
      _this.loading = true;
      fileParams.append('file', data);
      console.log('fileParams', fileParams);
      updateImage(fileParams).then(( data: res ) => 
        if (res.code != 0) 
          _this.loading = false;
          return _this.$message.error(res.msg);
        
        _this.defectSearchForm.sheetPicture = 'http://' + res.data.src;
        _this.loading = false;
      );
    ,

    beforeUpload(file) 
      const isType = file.type === 'image/jpeg' || 'image/png' || 'image/jpg';
      const isLt2M = file.size / 1024 / 1024 < 2;
      if (!isType) 
        this.$message.config(
          maxCount: 1,
        );
        this.$message.destroy();
        this.$message.error('图片格式错误,请上传图片!');
      
      if (!isLt2M) 
        this.$message.config(
          maxCount: 1,
        );
        this.$message.destroy();
        this.$message.error('上传头像图片大小不能超过 2MB!');
      
      return isType && isLt2M;
    ,

    // 删除项目图片(删除图片API deleteImage: '/sys/oss/delete')
    handleDeleteChange(file) 
      console.log('图片删除');
      console.log('file',file);
      let deletePlantInfoImgurl = file.url.substr(file.url.lastIndexOf('/') + 1);
      deleteFile(deletePlantInfoImgurl).then((res) => 
         if (res.code != 0) 
           return this.$message.error(res.data || res.msg);
         
         this.plantInfo.imgurl = '';
         this.fileList = [];
         this.$message.success('删除成功');
         return;
       );
    ,

效果：

如果你要实现大图预览的话：

previewVisible: false,
previewImage: '',

<a-upload name="avatar" class="avatar-uploader" action @preview="handlePreview" :showUploadList="false" :customRequest="uploadImage" list-type="picture-card" :file-list="fileList" :show-file-list="false" :before-upload="beforeUpload" :remove="handleDeletePlantImageChange" accept=".jpg,.JPG,.jpeg,.JPEG,.png,.PNG,.gif,.GIF">
    <div v-if="!defectSearchForm.sheetPicture">
      <a-icon type="plus" />
      <div class="ant-upload-text">上传</div>
    </div>
    <img v-else :src="defectSearchForm.sheetPicture" class="avatar" />
</a-upload>
<!-- 此处添加预览，注意 :showUploadList="true" 预览才能使用 -->
<a-modal :visible="previewVisible" :footer="null" @cancel="handleCancel">
    <img alt="example" style="width: 100%" :src="previewImage" />
</a-modal>

    //预览图片
    async handlePreview(file) 
      console.log('file',file)
      if (!file.url && !file.preview) 
        file.preview = await getBase64(file.originFileObj);
      
      this.previewImage = file.url || file.preview;
      this.previewVisible = true;
    ,

    //取消预览
    handleCancel()
      this.previewVisible = false;
    ,

其中 :showUploadList="false" 是否展示 uploadList, 可设为一个对象，用于单独设定 showPreviewIcon 和 showRemoveIcon。此时预览和删除功能消失，如果想更换图片，直接点击即可！

总结：

当然，代码肯定不能完全拿来用，可以参考某一部分，这个上传的图片是保存到了第三方的存储平台拿的url，具体看你自己需求吧！