增加视图标识

src/service/app/navdata-service.ts

@@ -49,6 +49,13 @@ export interface NavDataElement {
      */ 
     srfkey:string|null;
 
+    /**
+     * 视图标识
+     *
+     * @memberof NavDataElement
+     */ 
+    tag:string|null;
+
 }
 
 export interface ServiceState {