Core Animation is a framework for creating animated user interfaces, integrated with UIKit, allowing properties to be animated over time. It is widely used in various UI components and includes UIView animations with customizable properties and built-in transitions. Custom animations can be implemented by linking to the QuartzCore framework and defining specific animation types such as CABasicAnimation and CAKeyframeAnimation.

1. Starting
Core Animation

2. What is
Core Animation?
• Framework for easily creating animated
user interfaces.
• Tightly integrated with UIKit.
• Animate properties over time.
• Layer based.

3. Where is Core
Animation Used?
• Everywhere!
• Navigation controllers, displaying modal
view controllers, deselecting cells in a table
view, flipping to an info screen, etc!

4. UIView
Animation’s
• What you need most of the time.
• Happens within an animation block:
[UIView beginAnimations:nil context:NULL];
// change stuff
[UIView commitAnimations];

5. Customizing,
a little.
• [UIView setAnimationDuration:]
• [UIView setAnimationCurve:]
• UIViewAnimationCurveEaseInOut
UIViewAnimationCurveEaseIn
UIViewAnimationCurveEaseOut
UIViewAnimationCurveLinear
• Delay, repeat count, etc.

6. Built-in
Transitions
• UIViewAnimationTransitionFlipFromLeft
• UIViewAnimationFlipFromRight
• UIViewAnimationTransitionCurlUp
• UIViewAnimationTransitionCurlDown

7. Transforms
• setTransform:(CGAffineTransform)
• Rotation, scale, translation, etc

8. Demo

9. Layers
• 2d object in 3d space.
• “Animation Container”
• Override layerClass method to change the
type of a layer which your view uses.

10. Layer Types
• CALayer
• CAScrollLayer
• CATiledLayer
• CAEAGLLayer

11. Custom Animations
• Link against QuartzCore framework.
• Override actionForLayer:forKey: to return
custom animation for property changes.
• Set animation on a layer directly to trigger
an immediate animation.

12. Animation Types
• CABasicAnimation
• Go from point A to point B.
• CAKeyframeAnimation
• Go from A to B to C, etc.
• Animate along a path or by setting values and times
• Set calculation mode to paced, linear, or discrete.
• CAAnimationGroup
• Group multiple animations together.

13. Demo!