• Framework for easily creating animated user interfaces.

• Tightly integrated with UIKit.

• Animate properties over time.

• Layer based.

• Done in background thread.

• Almost always ....UIKit

• Lightweight
• short-lived

• Improve app's effectiveness
• Improve app's performance

• Layers
• Animatable properties
• Declarative model

• QuartzCore framework

 #import<QuartzCore/QuartzCore.h>......
CALayer *myLayer=[CALayer layer];myLayer.frame=CGRectMake(0,0,width,height);myLayer.position=CGPointMake(30.0,67.0);myLayer.content=mylogo;[self.layer addSubLayer:myLayer];

• Color
• Motion
• Opacity
• Visibility
  
• Filters
• Content

• Implicit Animation

• Simplest type of animation
• Simply change a layer property
  

 //myLayer.position=nearBottomRight;
[CATransaction setAnimationDuration:5];myLayer.position=nearBottomRight;

• Which property?

•   Use KeyPath
  
• @"position"
• @"position.y"
  
• ..........

• Animation=[CABasicAnimation animationWithKeyPath:@"..."];

 [layer addAnimation:animation];

CABasicAnimation *move=[CABasicAnimation animationWithKeyPath:@"position.y"];     move.duration=3;    move.toValue=[NSNumber numberWithFloat:300];   [myLayer addAnimation:move forKey:@"moveimage"];   

    CGFloat yAtStart=myLayer.position.y;
    myLayer.position=CGPointMake(myLayer.position.x, 300);    CABasicAnimation *move=[CABasicAnimation animationWithKeyPath:@"position.y"];
    move.duration=3;
    move.fromValue=[NSNumber numberWithFloat:yAtStart];
    move.toValue=[NSNumber numberWithFloat:300];
    [myLayer addAnimation:move forKey:@"position"]; 

• wwdc videos 2012
• Core animation programming guide
• Raywenderlich Tutorial
  
• [Addison-Wesley, 2010] Core Animation - Simplified Animation Techniques for Mac and iPhone Development