update：更新

src/components/app-panel-field/app-panel-field.vue

@@ -8,7 +8,7 @@
     </div>
     <div v-if="!Object.is(labelPos, 'NONE')" class="app-panel-field-label">
       <span v-if="required" style="color: red">* </span>
-      <span v-if="showCaption">{{caption}}</span>
+      <span v-if="showCaption">{{ caption }}</span>
     </div>
     <div
       v-if="
@@ -159,6 +159,18 @@ export default class AppPanelField extends Vue {
     }
   }
 
+  /**
+   * 错误信息
+   *
+   * @memberof AppPanelField
+   */
+  get error() {
+    const layoutModel = this.layoutModelDetails[this.itemName];
+    if (layoutModel) {
+      return layoutModel.error || `${this.caption} 值不能为空！`;
+    }
+  }
+
   /**
    * 值校验
    *