🐞 fix(签名模块): 处理签名七牛URL可能不生成问题

 <!--
  * @Date: 2023-03-29 17:44:24
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2023-03-30 11:04:24
+ * @LastEditTime: 2023-04-18 15:29:10
  * @FilePath: /data-table/src/components/SignField/MyComponent.vue
  * @Description: 文件描述
 -->
@@ -200,6 +200,8 @@ const cancelSign = () => {
 
 // 此处传入的值会替代 Field 组件内部的 value
 useCustomFieldValue(() => sign_value.value);
+
+defineExpose({ handleReset });
 </script>
 
 <style lang="less" scoped>

 <!--
  * @Date: 2022-09-06 16:29:31
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2023-03-29 17:58:28
+ * @LastEditTime: 2023-04-18 15:34:06
  * @FilePath: /data-table/src/components/SignField/index.vue
  * @Description: 电子签名控件
 -->
@@ -13,13 +13,14 @@
     </div>
     <van-field :name="item.key" :rules="rules" style="padding: 0;">
       <template #input>
-        <my-component />
+        <my-component ref="refComponent" />
       </template>
     </van-field>
   </div>
 </template>
 
 <script setup>
+import { showSuccessToast, showFailToast } from 'vant';
 import MyComponent from './MyComponent.vue';
 
 const props = defineProps({
@@ -32,11 +33,17 @@ const HideShow = computed(() => {
   return !props.item.component_props.disabled
 })
 
+const refComponent = ref(null)
+
 // 规则校验
 const required = props.item.component_props.required;
 const validator = (val) => {
   if (required && !val.url) {
     return false;
+  } else if (!val.url) { // 处理生成URL可能为空情况
+    showFailToast('电子签名保存失败，请重新生成')
+    refComponent.value.handleReset();
+    return false;
   } else {
     return true;
   }