desc:埋点[预约列表(我的)-页面浏览（浏览时长传空值）]

+import { DateTimeUtils } from 'wdKit/Index';
+import { TrackingPageBrowse, TrackConstants } from 'wdTracking/Index';
 import { AppointmentListUI } from '../mine/appointment/AppointmentListUI'
 
 const TAG = "AppointmentListPage"
@@ -5,6 +7,19 @@ const TAG = "AppointmentListPage"
 @Entry
 @Component
 struct AppointmentListPage {
+  pageShowTime:number = 0;
+  pageHideTime:number = 0;
+
+  onPageShow() {
+    this.pageShowTime = DateTimeUtils.getTimeStamp()
+  }
+
+  onPageHide(): void {
+    this.pageHideTime = DateTimeUtils.getTimeStamp()
+    let duration = 0
+    duration = Math.floor((this.pageHideTime - this.pageShowTime)/1000)
+    TrackingPageBrowse.trackCommonPageExposureEnd(TrackConstants.PageName.My_Saved_Live,TrackConstants.PageName.My_Saved_Live,duration)
+  }
 
   build() {
     Column(){