fix 默认值为空优化

@@ -8,7 +8,6 @@ export {}
 declare module '@vue/runtime-core' {
   export interface GlobalComponents {
     AppointmentField: typeof import('./src/components/AppointmentField/index.vue')['default']
-    ApprovalField: typeof import('./src/components/ApprovalField/index.vue')['default']
     AreaPickerField: typeof import('./src/components/AreaPickerField/index.vue')['default']
     ButtonField: typeof import('./src/components/ButtonField/index.vue')['default']
     CalendarField: typeof import('./src/components/CalendarField/index.vue')['default']
@@ -57,7 +56,6 @@ declare module '@vue/runtime-core' {
     VanDatePicker: typeof import('vant/es')['DatePicker']
     VanDivider: typeof import('vant/es')['Divider']
     VanField: typeof import('vant/es')['Field']
-    VanFloatingBubble: typeof import('vant/es')['FloatingBubble']
     VanForm: typeof import('vant/es')['Form']
     VanIcon: typeof import('vant/es')['Icon']
     VanImage: typeof import('vant/es')['Image']

 <!--
  * @Date: 2022-08-31 16:16:49
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2024-06-13 16:40:11
+ * @LastEditTime: 2024-06-14 15:01:13
  * @FilePath: /data-table/src/components/ImageUploaderField/index.vue
  * @Description: 图片上传控件
 -->
@@ -90,7 +90,7 @@ const default_list = ref([]);
 
 onMounted(() => {
   // 默认图片显示
-  if (default_tmp.value.length) {
+  if (default_tmp.value && default_tmp.value.length) {
     default_list.value = default_tmp.value.map(item => item.url)
   }
 })