Recently, I developed two open source UIKit controls you can easily use in your apps. They are called TLTiltHighlightView and TLTiltSlider. I call them “tilt” becuase they adjust their appearance depending on how you hold your device.
These controls mimic the subtle effects present in the iOS 6 music app. It shows the attention to detail that Apple demonstrates. It’s a bar they set that we should all try and surpass.