What is the UI element on iPad Photos App?

Please see the youtube:

http://www.youtube.com/watch?v=FC95AR开发者_JAVA技巧d96wI

notice that the 0:35 , the iPad bottom have a thin photo bar. Is it a private API or I need to create my own or Which UI Element will it be? Thz.

That's definitely a custom job. However, it's basically a UIToolbar with a fancy slider on it. You can easily make the toolbar using Interface Builder, and you could take a simple stab at the slider by taking a regular UISlider and giving it some replacement images for its track, thumb, etc. See the documentation on UISlider.

If that doesn't quite work, then you're going to have to get down and dirty in UIControl code and make on yourself from scratch (or hope and pray that someone has written an open source version already).