CATransition

CATransition is an Objective-C wrapper for creating view transitions. As of 3.1.2, there are 11 types of transitions. 4 of them are SDK-compatible, but are the most boring ones. The following shows all 11 types of transition from picture "A" to "B" at 40%. The subtypes, if any, is "fromLeft".

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  cameraIris

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  cube

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  fade (kCATransitionFade)

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  moveIn (kCATransitionMoveIn)

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  oglFlip

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  pageCurl

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  pageUnCurl

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  push (kCATransitionPush)

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  reveal (kCATransitionReveal)

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  rippleEffect

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  suckEffect

Subtype and filter

Main article: CAFilter

Many transitions have are further divided into several discrete subtypes. They often control the movement direction of the animation.

Some transitions accept addition arguments through the filter property, for example, you can set the location of suckEffect using

...
CAFilter* filter = [CAFilter filterWithName:@"suckEffect"];
[filter setValue:[NSValue valueWithCGPoint:CGPointMake(160, 240)] forKey:@"inputPosition"];
transition.filter = filter;
...

Transition	Subtypes	Accepted parameters
moveIn push reveal	fromLeft, fromRight, fromBottom, fromTop	-
pageCurl, pageUnCurl	fromLeft, fromRight, fromTop, fromBottom	float inputColor[];
cube alignedCube	fromLeft, fromRight, fromTop, fromBottom	float inputAmount; (perspective)
flip alignedFlip oglFlip	fromLeft, fromRight, fromTop, fromBottom	float inputAmount;
cameraIris	-	CGPoint inputPosition;
rippleEffect	-	-
rotate	90cw, 90ccw, 180cw, 180ccw	-
suckEffect	-	CGPoint inputPosition;

Availability

The following shows the availability of different CATransitions starting from 2.0:

CATransition	Availability
fade moveIn push reveal	(Public API) 2.0–
flip alignedFlip oglFlip	2.0–
cube alignedCube	2.0–
pageCurl pageUnCurl	2.0–
rippleEffect	2.0–
suckEffect	2.0–
cameraIris cameraIrisHollowOpen cameraIrisHollowClose	2.0–
rotate	4.0–
spewEffect genieEffect unGenieEffect twist swirl charminUltra reflection zoomyIn zoomyOut mapCurl mapUnCurl oglApplicationSuspend cameraIrisHollow	2.0–2.2

External links

• Official reference: CATransition
• Header: http://github.com/kennytm/iphone-private-frameworks/blob/master/QuartzCore/CATransition2.h