fix: 沉浸式播放时关闭网络，恢复网络后，切换到直播tab，tab列表内容未自动重新加载

 import { CommonConstants, ViewType } from 'wdConstant';
 import { CommonConstants, ViewType } from 'wdConstant';
-import { Logger } from 'wdKit';
+import { Logger, NetworkUtil } from 'wdKit';
 import { EmptyComponent } from '../view/EmptyComponent';
 import { EmptyComponent } from '../view/EmptyComponent';
 import PageModel from '../../viewmodel/PageModel';
 import PageModel from '../../viewmodel/PageModel';
 import { autoRefresh, onActionEnd, onActionStart, onActionUpdate } from '../../utils/PullDownRefresh';
 import { autoRefresh, onActionEnd, onActionStart, onActionUpdate } from '../../utils/PullDownRefresh';
@@ -41,6 +41,7 @@ export struct PageComponent {
   private pageTrackBean: PageTrackBean = new PageTrackBean()
   private pageTrackBean: PageTrackBean = new PageTrackBean()
   // 国殇灰度管理
   // 国殇灰度管理
   GrayManage: SubscribedAbstractProperty<GrayManageModel> =  AppStorage.link<GrayManageModel>('GrayManage')
   GrayManage: SubscribedAbstractProperty<GrayManageModel> =  AppStorage.link<GrayManageModel>('GrayManage')
+  @State netStatus: number | undefined = undefined // 存储网络状态用来展示缺省图
 
 
   build() {
   build() {
     Column() {
     Column() {
@@ -278,18 +279,25 @@ export struct PageComponent {
     if (this.navIndex === this.currentTopNavSelectedIndex) {
     if (this.navIndex === this.currentTopNavSelectedIndex) {
       this.getData();
       this.getData();
       this.needload = false;
       this.needload = false;
+      // console.log(TAG, 'aboutToAppear onAutoRefresh111 ' + this.needload)
     }
     }
   }
   }
 
 
   onChange() {
   onChange() {
-    Logger.info(TAG,
-      `onChangezz id: ${this.pageId} , ${this.channelId} , ${this.navIndex} , navIndex: ${this.currentTopNavSelectedIndex}`);
-    if (this.navIndex === this.currentTopNavSelectedIndex) {
-      Logger.debug(TAG, 'page onAutoRefresh111 ' + this.needload)
-      if (this.needload) {
-        this.getData();
+    // console.log(TAG, `onChangezz id: ${this.pageId} , ${this.channelId} , ${this.navIndex} , navIndex: ${this.currentTopNavSelectedIndex}`);
+    // 注册监听网络连接
+    this.netStatus = undefined
+    let netStatus = NetworkUtil.isNetConnected()
+    if (netStatus) {
+      if (this.navIndex === this.currentTopNavSelectedIndex) {
+        // console.log(TAG, 'page onAutoRefresh111 ' + this.needload)
+        if (this.needload) {
+          this.getData();
+        }
+        this.needload = false;
       }
       }
-      this.needload = false;
+    } else {
+      this.pageModel.viewType = ViewType.EMPTY;
     }
     }
   }
   }