具有后台更新的远程通知

Question

我正在实施远程通知，并且我在向用户显示通知之前尝试更新应用。

问题是在我完成数据更新之前会显示通知，我缺少什么？

public override void DidReceiveRemoteNotification (UIApplication application, NSDictionary userInfo, Action<UIBackgroundFetchResult> completionHandler)
{
   //Some code to update the data - the notification is shown before this executed.

     completionHandler (UIBackgroundFetchResult.NewData);

}