上传成功的 icon 有一个onSuccess() api
默认进度条有一个onProgress() api

this.$axios({
              method: 'post',
              url: this.upload.url,
              data:formdata,
              config,
              onUploadProgress: progressEvent => {//axios自带api，获取上传进度
                const complete = parseInt(
                  ((progressEvent.loaded / progressEvent.total) * 100) | 0,
                  10
                )
                data.onProgress({ percent: complete })//调用组件自带进度条
              }
            }).then(res=>{
                data.onSuccess()//显示完成按钮小图标
            }).catch(err => {
              if (err.response.status && err.response.status == 500){
                this.$message.warning(err.response.data.msg)
              }
              let uid = data.file.uid
              let idx = this.$refs.upload.uploadFiles.findIndex(item => item.uid === uid) // 关键作用代码，去除文件列表失败文件（uploadFiles为el-upload中的ref值）    
              this.$refs.upload.uploadFiles.splice(idx, 1) // 关键作用代码，去除文件列表失败文件
               
          })
        
      },