然后method里面的方法

upLoadOnSelf（fileParam）{
 const fileObj =fileParam.file; 
 const form = new FormData(); 
 form.append("file", fileObj); 
 this.$http.post(`/file/upload`, form, 
 {onUploadprogress:function(event){ 
    percent = event.loaded/event.total*100 
    fileParam.onProgress({percent:percent }) 
  } 
 }).then(res={//处理成功情况
 fileParam.onSuccess()//显示完成按钮小图标
    ...//其它处理
 }) 
}，
uploadOnProgress（event,file,fileList）{
   this.progress=event.perecent  //调用默认的进度条
}