title: iphone - How does Whatsapp separate notifications?
body: <p>Im about to develop notifications for my app. 
  In whatsapp you can receive group messages or single messages, and you are able to block one or the other type of notifications with in the settings of the app, not in the general settings of the phone, where you can disable any notifications.</p>
  
  <p>My app will receive different types of notifications, the user should also be able to block notifications of one type and enable others.</p>
  
  <p>What I don't understand is how my app or whatsapp is able to distinguish the different types of notifications, from what I know the notifications are handled by the iOS, so could you explain me how this can be done?</p>
  
  <p>thanks</p>