LearniOS 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 …

• Accessibility
• HTML
• Website Basics
• CSS3
• Aesthetic Foundations
• HTML5
• iOS Development
• JavaScript
• Responsive Web Design
• Ruby

New videos are added regularly, so it’s a great way to stay up-to-date on all the latest technology and methods. Browse the entire library of videos.