iOS Notifications Concept

This 2.5 minute video teaches you about notifications. A notification is a message sent to one or more observing objects informing them of an event. The event observing object has to register with a singleton notification center.


This video is the first video in the Notifications badge from Treehouse, a high-quality video training site with hundreds of short videos. The entire Notifications badge consists of the following videos:

  1. Concept
  2. Observer
  3. Post

Other topics on Treehouse include topics like …

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