Using a Custom UISlider - Cocoa Touch

Okay I've created a slider in photoshop which I want to use as a volume button in my application using开发者_如何学C a uislider. How do I make it so i can use a custom uislider design in my app?

Thanks

http://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UISlider_Class/Reference/Reference.html