Core Application Concepts
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This article discusses the Core Graphics iOS framework that provides low-level drawing support. It shows how to use Core Graphics to draw geometry, images and PDFs.
This article examines the Core Animation framework, showing how it enables high performance, fluid animations in UIKit, as well as how to use it directly for lower-level animation control.
This article demonstrates step by step how to create an application that uses Core Graphics and Core Animation. It shows how to draw on the screen in response to user touch as well as how to animate an image to travel along a path.