How can I use CIFilter in iPhone OS?

Question

Apple says that CIFilter is available in iPhone OS. However, on my mac I couldn't find an CoreImage framework to link against.

filter An optional Core Image filter object that provides the transition.

@property(retain) CIFilter *filter

i.e. when I try to do something like this, it crashes because CIFilter is unknown:

[transition setFilter:[CIFilter filterWithName:@"CIShapedWaterRipple"]];

I linked against:

#import <UIKit/UIKit.h>
#import <QuartzCore/QuartzCore.h>
#import <CoreGraphics/CoreGraphics.h>

Answer 1

You can't, CIFilter is not available on the phone. Where did you find something saying it was?

Answer 2

I found it in sample code in the Core Video Programming Guide. But, there is no import statement in the sample code. So, I have no idea how to access this. It is very frustrating.