title: How to create simple custom filter for iOS using Core Image Framework?
body: <p>I want to use in my app an <strong>custom</strong> filter. Now I know that I need to use <strong>Core Image</strong> framework, but i not sure that is right way.
  Core Image framework uses for <strong>Mac OS</strong> and in <strong>iOS 5.0</strong> - I'm not sure that could be used for custom CIFilter effects.
  Can you help me with this issues?
  Thanks all!</p>