element ui 文件上传和删除

 // 上传照片
    handleAvatarSuccesshome1(res, file) {
      console.log(res);
      if (this.form.beforePictures == null) {
        this.form.beforePictures = ''
      }
      console.log(this.form.beforePictures);
      this.homealist = res.url
      console.log(this.homealist)
      let tes = this.form.beforePictures.concat(this.homealist,',')
      this.form.beforePictures = tes
      console.log(this.form.beforePictures);
      //this.imageUrl = URL.createObjectURL(file.raw)
    },

//删除
handleRemove(file, fileList) {
      console.log(fileList)
      let ss = ''
      if(file.response == undefined){
        ss = file.url.replace('图片地址上传', '')
      }else{
        ss = file.response.url
      }
      console.log(ss);
      deleteImage(ss).then(res=>{
        console.log(res);
      })
      // console.log(fileList.length);
      let array = this.form.beforePictures.split(',')
      let tab = array.filter((beforePictures) => {
        return beforePictures != ss;
      });
      console.log(tab);
      let table = tab.join(',')
      this.form.beforePictures = table
      console.log(this.form.beforePictures);
    },

将图片转为字符串