优化部分代码逻辑

src/components/app-mob-select-drop-down/app-mob-select-drop-down.vue

 <template>
-  <!-- <div :class="[{'hidden':this.refvalue !=''},'app-select-drop-down']">
-    <van-dropdown-menu>
-      <van-dropdown-item
-      @open="(query) => this.onSearch(query,  true)"
-        v-model="refvalue"
-        :options="items"
-        :disabled="disabled ? disabled : false"
-      />
-    </van-dropdown-menu>  
-    <van-icon :style="{display :this.refvalue ==''? 'none' : 'block'}" @click="onClear" class="close_icon" name="cross" />
-  </div> -->
-
      <div class="app-mobile-select-drop-down">
         <ion-icon v-if="curvalue" name="close-circle-outline" @click="clear"></ion-icon>
         <ion-select :value="curvalue"  :disabled="disabled " @ionChange="change" interface="popover">
@@ -300,25 +288,20 @@ export default class AppSelectDropDown extends Vue {
         }
         this.inputState = false;
         Object.assign(_param, { query: query });
-        if(!this.service){
-            this.$notify({ type: 'danger', message: '错误，缺少参数service！' });
-            
-        } else if(!this.acParams.serviceName) {
-            this.$notify({ type: 'danger', message: '错误，缺少参数serviceName！' });
-        } else if(!this.acParams.interfaceName) {
-            this.$notify({ type: 'danger', message: '错误，缺少参数interfaceName！' });
+        if (!this.acParams.serviceName || !this.acParams.interfaceName) {
+            this.$notify({ type: 'danger', message: '请在对应实体属性中配置关联实体与数据集！' });
+            return ;
         }
         const appEntityServiceConstructor = window.appEntityServiceConstructor;
         const entityService: any = await appEntityServiceConstructor.getService(this.acParams.serviceName);
-        if (entityService[this.acParams.interfaceName] && entityService[this.acParams.interfaceName] instanceof Function) {
-            entityService[this.acParams.interfaceName](_context, _param).then((response: any) => {
-                if (response && response.status === 200) {
-                    this.items = response.data;
-                    this.result(this.items);
-                }
-            }).catch((response: any) => {
+        if (entityService && entityService[this.acParams.interfaceName] && entityService[this.acParams.interfaceName] instanceof Function) {
+            const response = await entityService[this.acParams.interfaceName](_context, _param);
+            if (response && response.status === 200) {
+                this.items = response.data;
+                this.result(this.items);
+            } else {
                 this.$notify({ type: 'danger', message: '错误，请求异常！' });
-            });
+            }
         }
     }