vue+element-plus上传图片及回显问题及数量限制

fileList.value.push({url:照片的路径})

import { ElMessageBox } from "element-plus";

          <p class="commodity_img">
            <!-- 上传图片 -->
            <el-upload
              :class="{ hide_box: upload_btn }"
              :on-success="handleSuccess"
              list-type="picture-card"
              :action="'/pcapi/File/fileimg'"
              :on-change="handleChanges"
              :before-remove="beforeRemove"
              :on-preview="handlePictureCardPreview"
              :file-list="fileList "
              multiple
              limit="1"
              name="img"
            >
              <el-icon class="avatar-uploader-icon">
                <Plus />
              </el-icon>
            </el-upload>
          </p>

<style scoped>
.hide_box /deep/ .el-upload--picture-card {
  display: none;
}
</style>

const upload_btn = ref(false);
const fileList = ref([]);
const handleSuccess = () => {
  // 上传成功后，隐藏上传按钮
  upload_btn.value = true;
};
const handleChanges = img => {
  if (img.status == "success") {
    fileList.value = img.response.front_file;
  }
};
// 删除
const beforeRemove = () => {
  const result = new Promise((resolve, reject) => {
    ElMessageBox.confirm("此操作将删除该图片, 是否继续?", "提示", {
      confirmButtonText: "确定",
      cancelButtonText: "取消",
      type: "warning"
    })
      .then(() => {
        resolve();
        fileList.value = [];
        upload_btn.value = false;
      })
      .catch(() => {
        reject(false);
      });
  });
  return result;
};