If you are an iOS developer, you owe it to yourself to try and learn the Core Animation framework because it isn’t just about animation. Core Animation makes much of what you see in iOS applications possible.

Here are some resources to get  you started:

• Delight Your Users with Core Animation  by Frank Kreuger
• Crafting Interactions with Core Animation by David Ortinau
• Graphics and Animation in iOS
• Graphics and Animation Walkthrough
• Core Animation Recipes
• Core Animation Sample

Going through these resources will give an understanding of how the Core Animation framework is at the heart of iOS, which will help you to create experiences that differentiate your application.