拖拽上传修改

src/components/plugins/table-form/hc-form-upload.vue

@@ -10,7 +10,7 @@
         element-loading-text="上传中..." @exceed="formUploadExceed" @success="formUploadSuccess"
     >
         <img v-if="isSrc" :src="isSrc" alt="" class="hc-table-form-img">
-        <div v-else class="hc-table-form-icon mt-25">
+        <div v-else class="hc-table-form-icon mt-50%">
             点此选择文件并上传
         </div>
         <div v-if="isSrc" class="hc-table-form-del">