增加计数器销毁条件

src/components/app-mob-menu-ionic-view/app-mob-menu-ionic-view.vue

@@ -101,8 +101,10 @@ export default class AppMobMenuIonicView extends Vue {
      * @memberof AppMobMenuIonicView
      */
     public destroyed() {
+        if(this.counterServide){
             this.counterServide.destroyCounter();
         }
+    }
 
     /**
      * 计数器