private void Timer_focus_Tick(object sender, object e)
        {
            var elent = FocusManager.GetFocusedElement();

            if (elent is Button || elent is AppBarButton || elent is HyperlinkButton || elent is MenuFlyoutItem)
            {
                BtnFoucs.Focus(FocusState.Programmatic);
            }
        }
 private void LiveDetailPage_Loaded(object sender, RoutedEventArgs e)
 {
     Window.Current.CoreWindow.KeyDown += CoreWindow_KeyDown;
     BtnFoucs.Focus(FocusState.Programmatic);
     DanmuControl.ClearAll();
     if (this.Parent is MyFrame)
     {
         (this.Parent as MyFrame).ClosedPage -= LiveDetailPage_ClosedPage;
         (this.Parent as MyFrame).ClosedPage += LiveDetailPage_ClosedPage;
     }
     timer_focus.Start();
     controlTimer.Start();
 }