/// <summary>
/// 执行页面后退
/// </summary>
/// <returns></returns>
public static async void GoBack()
{
if (SysVisual.ExistDlg)
{
Dlg dlg = SysVisual.GetTopDlg() as Dlg;
if (dlg != null)
{
dlg.Close();
}
return;
}
var frame = SysVisual.RootFrame;
if (frame.CanGoBack)
{
if (frame.Content is PhonePage page)
{
// 因OnNavigatingFrom中的取消导航无法实现异步！在此处判断
if (await page.IsAllowBack())
{
frame.GoBack();
}
}
else
{
frame.GoBack();
}
}
}
static void OnItemsChanged(object sender, ItemListChangedArgs e)
{
if (e.CollectionChange == CollectionChange.ItemInserted || e.CollectionChange == CollectionChange.ItemChanged)
{
var info = ((ItemList <NotifyInfo>)sender)[e.Index];
SysVisual.InsertNotifyItem(e.Index, new NotifyItem(info));
}
else if (e.CollectionChange == CollectionChange.ItemRemoved)
{
SysVisual.RemoveNotifyItem(e.Index);
}
else
{
SysVisual.ClearAllNotify();
}
}
