iOS Core Animation: Advanced Techniques

Core Animation is the technology underlying Apple’s iOS user interface. By unleashing the full power of Core Animation, you can enhance your app with impressive 2D and 3D visual effects and create exciting and unique new interfaces. ¿ In this in-depth guide, iOS developer Nick Lockwood takes you step-by-step through the Core Animation framework, building up your understanding through sample code and diagrams together with comprehensive explanations and helpful tips. Lockwood demystifies the Core Animation APIs, and teaches you how to make use of Layers and views, software drawing and hardware compositing Layer geometry, hit testing and clipping Layer effects, transforms and 3D interfaces Video playback, text, tiled images, OpenGL, particles and reflections Implicit and explicit animations Property animations, keyframes and transitions Easing, frame-by-frame animation and physics Performance tuning and much, much more! Approximately 356 pages. www.informit.com/aw

Table of Contents:
Preface Audience and Material Book Structure Before We Begin I: The Layer Beneath 1  The Layer Tree Layers and Views CALayer Parallel Hierarchies Layer Capabilities Working with Layers Summary 2  The Backing Image The contents Image contentsGravity contentsScale masksToBounds contentsRect contentsCenter Custom Drawing Summary 3  Layer Geometry Layout anchorPoint Coordinate Systems Flipped Geometry The Z Axis Hit Testing Automatic Layout Summary 4  Visual Effects Rounded Corners Layer Borders Drop Shadows Shadow Clipping The shadowPath Property Layer Masking Scaling Filters Group Opacity Summary 5  Transforms Affine Transforms Creating a CGAffineTransform Combining Transforms The Shear Transform 3D Transforms Perspective Projection The Vanishing Point The sublayerTransform Property Backfaces Layer Flattening Solid Objects Light and Shadow Touch Events Summary 6  Specialized Layers CAShapeLayer Creating a CGPath Rounded Corners, Redux CATextLayer Rich Text Leading and Kerning A UILabel Replacement CATransformLayer CAGradientLayer Basic Gradients Multipart Gradients CAReplicatorLayer Repeating Layers Reflections CAScrollLayer CATiledLayer Tile Cutting Retina Tiles CAEmitterLayer CAEAGLLayer AVPlayerLayer Summary II: Setting Things in Motion 7  Implicit Animations Transactions Completion Blocks Layer Actions Presentation Versus Model Summary 8  Explicit Animations Property Animations Basic Animations CAAnimationDelegate Keyframe Animations Virtual Properties Animation Groups Transitions Implicit Transitions Animating Layer Tree Changes Custom Transitions Canceling an Animation in Progress Summary 9  Layer Time The CAMediaTiming Protocol Duration and Repetition Relative Time fillMode Hierarchical Time Global Versus Local Time Pause, Rewind, and Fast-Forward Manual Animation Summary 10  Easing Animation Velocity CAMediaTimingFunction UIView Animation Easing Easing and Keyframe Animations Custom Easing Functions The Cubic Bézier Curve More Complex Animation Curves Keyframe-Based Easing Automating the Process Summary 11  Timer-Based Animation Frame Timing NSTimer CADisplayLink Measuring Frame Duration Run Loop Modes Physical Simulation Chipmunk Adding User Interaction Simulation Time and Fixed Time Steps Avoiding the Spiral of Death Summary III: The Performance of a Lifetime 12  Tuning for Speed CPU Versus GPU The Stages of an Animation GPU-Bound Operations CPU-Bound Operations IO-Bound Operations Measure, Don’t Guess Test Reality, Not a Simulation Maintaining a Consistent Frame Rate Instruments Time Profiler Core Animation OpenGL ES Driver A Worked Example Summary 13  Efficient Drawing Software Drawing Vector Graphics Dirty Rectangles Asynchronous Drawing CATiledLayer drawsAsynchronously Summary 14  Image IO Loading and Latency Threaded Loading GCD and NSOperationQueue Deferred Decompression CATiledLayer Resolution Swapping Caching The +imageNamed: Method Custom Caching NSCache File Format Hybrid Images JPEG 2000 PVRTC Summary 15  Layer Performance Inexplicit Drawing Text Rasterization Offscreen Rendering CAShapeLayer Stretchable Images shadowPath Blending and Overdraw Reducing Layer Count Clipping Object Recycling Core Graphics Drawing The  renderInContext: Method Summary

About the Author :
Nick Lockwood is head of iOS development at the digital agency AKQA in London, and a prolific developer of applications and open source libraries. He has been working with the iOS platform for the past four years, after making the switch from HTML5 web-app development. Nick first picked up a programming book in 1993 at a middle school rummage sale and hasn’t looked back since. He lives in Sidcup with his wife and daughter.