Next Previous

Animatable Properties

Many of the properties in CALayer and CIFilter can be animated. This appendix lists those properties, along with the animation used by default.

CALayer Animatable Properties

Table B-1 lists the properties of the CALayer class that you might consider animating. For each property, the table also lists the type of default animation object that is created to execute an implicit animation.

**Table B-1** Layer properties and their default animations
Property	Default animation
`anchorPoint`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`backgroundColor`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`backgroundFilters`	Uses the default implied `CATransition` object, described in Table B-3. Sub-properties of the filters are animated using the default implied `CABasicAnimation` object, described in Table B-2.
`borderColor`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`borderWidth`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`bounds`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`compositingFilter`	Uses the default implied `CATransition` object, described in Table B-3. Sub-properties of the filters are animated using the default implied `CABasicAnimation` object, described in Table B-2.
`contents`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`contentsRect`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`cornerRadius`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`doubleSided`	There is no default implied animation.
`filters`	Uses the default implied `CABasicAnimation` object, described in Table B-2. Sub-properties of the filters are animated using the default implied `CABasicAnimation` object, described in Table B-2.
`frame`	This property is not animatable. You can achieve the same results by animating the `bounds` and `position` properties.
`hidden`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`mask`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`masksToBounds`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`opacity`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`position`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`shadowColor`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`shadowOffset`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`shadowOpacity`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`shadowPath`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`shadowRadius`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`sublayers`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`sublayerTransform`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`transform`	Uses the default implied `CABasicAnimation` object, described in Table B-2.
`zPosition`	Uses the default implied `CABasicAnimation` object, described in Table B-2.

Table B-2 lists the animation attributes for the default property-based animations.

**Table B-2** Default Implied Basic Animation
Description	Value
Class	`CABasicAnimation`
Duration	0.25 seconds, or the duration of the current transaction
Key path	Set to the property name of the layer.

Table B-3 lists the animation object configuration for default transition-based animations.

**Table B-3** Default Implied Transition
Description	Value
Class	`CATransition`
Duration	0.25 seconds, or the duration of the current transaction
Type	Fade (`kCATransitionFade`)
Start progress	`0.0`
End progress	`1.0`

CIFilter Animatable Properties

Core Animation adds the following animatable properties to Core Image’s CIFilter class. These properties are available only on OS X.

name
enabled

For more information about these additions, see CIFilter Core Animation Additions.

Next Previous