iOS Drawing: Practical UIKit Solutions

Covers iOS 7 and Xcode 5

Apple lavished iOS with a rich and evolving library of resolution-independent 2D drawing utilities. Its APIs include powerful features such as transparency, path-based drawing, anti-aliasing, and more. Harness these low-level, lightweight drawing routines in your apps to build images, to create PDFs, to display views, and to print.

In this guide, Erica Sadun, bestselling author of The Core iOS 6 Developer’s Cookbook and The Advanced iOS 6 Developer’s Cookbook, helps readers explore iOS drawing through an abundance of examples alongside plenty of explanations and tips. This short work provides the basic how-to developers need to get started. You will learn about these specific topics:

• The basic concepts of Quartz (Core Graphics) and UIKit drawing
• The coordinate system, paths, masking, and clipping
• Text drawing
• Transparency and alpha channels, drawing modes, blending, colors, and spaces
• Transforms and geometry
• Patterns, shadows, and gradients
• Bitmaps and pixels

To access the code samples, visit https://github.com/erica/iOS-Drawing.

Table of Contents

Chapter 1. Drawing Contexts
Chapter 2. The Language of Geometry
Chapter 3. Drawing Images
Chapter 4. Path Basics
Chapter 5. Paths in Depth
Chapter 6. Drawing Gradients
Chapter 7. Masks, Blurs, and Animation
Chapter 8. Drawing Text

Appendix A. Blend Modes
Appendix B. Miter Threshold Limits