A little more than a year ago, I released my first iPhone application, Spiral by Digital Generalists. After several updates and many happy customers, I’ve decided to release the drawing engine for Spiral as an open source framework through my company, Digital Generalists, LLC..
What Is SpiralKit
SpiralKit is a Quartz 2D-based drawing framework for iOS written in Objective-C. The framework enables ‘drawing’ on a UIView in an iOS application and ships with pen, highlighter, and eraser drawing effects.
The framework is built specifically to enable easily adding new effects, color spaces, and drawing algorithms in a modular fashion. If you want to provide a unique drawing effect, support of the CMYK color space, or a custom drawing algorithm, you can add such features to SpiralKit without having to modify the fundamental components of the framework.
Where to Find It
The project is hosted on GitHub at https://github.com/digital-generalists/spiralkit.