NGAParallaxMotion

A tiny category on UIView that allows you to set one property: parallaxIntensity to achieve a parallax effect with UIMotionEffect.

Show the parallax effect in one line

theView.parallaxIntensity = 10;

Positive values make the view appear to extend from the screen. Negative values make the view appear to recess behind the screen.

Additionally, you can set this property within Interface Builder by editing the "User Defined Runtime Attributes" and adding:

KeyPath           |  Type  | Value
----------------------------------------------
parallaxIntensity | Number |  your depth value

This code is under the MIT license.