title: How to clear a remote pushed notification for iOS?
body: <p>So I've been reading up on remote notifications, and have finally made it work; our app is receiving notifications from our server. We now want to remove or update an unread notification if a certain condition meets on our server (e.g the notification is no longer valid). I understand that "silent" notifications are the only way to go, but I am still confused as to how.
  If a silent notification triggers my app to wake up, I would be able to schedule local notifications, but will I be able to remove already existing remote notifications?</p>
  
  <p>Is the only solution to exclusively use silent notifications from the server, and schedule <strong>all</strong> notifications as local notifications with a custom identifier which I can later remove?
  E.g, can I never use fire&amp;forget remote push notifications from my server to devices if I want this feature?</p>
  
  <p>Edit: This app supports down to <strong>iOS 9</strong> :/</p>