In this Episode, I will illustrate how an observer object can listen to notifications sent by a particular object. I assume you have already watched Episode #6.

• Download .mov file (32.8 MB, 5:45)
• Download .m4v file for iPod & Apple TV (11.4 MB, 5:45)
• This episode on Vimeo (HD quality)
• Full episode source code

As always, feel free to give some feedback about this episode!

In this episode, I will show you how notifications can be used by an object to inform an arbitrary number of observer objects of a particular action.

• Download .mov file (24.2 MB, 5:58)
• Download .m4v file for iPod & Apple TV (11.2 MB, 5:58)
• This episode on Vimeo (HD quality)
• Full episode source code

[update] : In the screencast, I renamed contentView -> _contentView and slider -> _slider. It is a good guideline *not* to use the _ for the instance variables in your code to avoid conflict with Cappuccino super class instance variables. I’ve updated the eposide code to reflect those changes. Thanks to Ross for pointing this out.