Duncan Champney

iOS-CAAnimation-group-demo. This is a demo project that illustrates various Core Animation techniques, focusing on animation sequences created using CAAnimationGroup

RandomBlobs. A project that shows how to create random, non-selfintersecting smoothly curved shapes using UIBezierPaths and Catmull-Rom spline based smoothing. (With a tip of the hat to Erica Sadun, who's path smoothing recipe is a key component.)

CropImg. A sample application written in Swift for creating crops of images

KeyframeViewAnimations. A project that demonstrates the new UIView keyframe animations added in iOS 7, as well as using the CAAnimation valueFunction property

MaskableImageView. Swift

SwiftDataContainerSingleton. A demo project in Swift illustrating how to share data between the view controllers in your project using a data container singleton

CIFilterTest. A project for trying out the various CoreImage filters supported by iOS

PieChart. A sample iOS app written in swift that generates pie charts.

ClockAnimation. A project that shows how to use iOS 7 view animation with spring physics

BlurView. A Swift-based iOS project attempting to create a view class that blurs its contents with variable radius

ClockWipeSwift. A demo of creating a clock wipe animation using Swift

AnimatePaths. Swift

UIViewPropertyAnimator-test. A project demonstrating the new UIViewPropertyAnimator class added to iOS 10

ImageViewWithMask. A Swift Playground that shows how to create a custom subclass of UIImageView with a circular mask layer on top

test. A demo of using multiple static table views in iOS 6.

FireEmitter. Swift

LastNItemsBufferGraph. Swift

ButonWiggle. A project that makes a custom jellybean button wiggle like it's made of... jelly

Animate-Img. A project to illustrate UIImageView frame animation with cross-fade between images.

WTCheckboxDemo. An iOS demo project that shows how to create a custom UIButton subclass that acts like a chckbox.

RoundedCornerPolygon. Swift

KeyframeAnimations. Swift

SwiftCompletionHandlers. A Swift demo project that illustrates how to use completion handlers to manage asynchronous processing like network downloads

Async_demo. Swift

UIImageMask. Swift

Password-generator. A Mac program for generating random passwords from a word list. Also shows how to use a Data Container Singleton object

MorphingButton. A Swift demo project that illustrates how to make a button outline animate from a rounded rectangle to a circle and back.

DatesInSwift. A Swift demo project showing various techniques for dealing with dates, plus using switch statements with tuples

DictionaryToJSON. A project demonstrating how to convert an NSDictionary to and from a JSON string using a category

BlurredTextView. A demo project that blurs a UITextView using a Core Image blur filter

OvalView. Swift

TrochoidDemo. A project that creates "Trochoid" curves simulating the motion of waves in water.

BlurredStrokedPath. An iOS project that uses Core Animation and a layer's `shadowPath` to animate blurred stroked paths.

AnimationGroups. A demo project that illustrates using a CAAnimationGroup object to animate multiple layers

TabBarControllers. A simple demonstration of programmatically switching from one tab of a tab bar controller to another.

PolarGradientMaskView. Swift

DispatchGroupDemo. Swift

LinesBetweenViews. A sample project illustrating how to create a custom UIView subclass that sets up its backing layer as a CAShapeLayer and draws lines between pairs of subviews.

GradientView. A project demonstrating using radial gradients to mask UIViews

CaretToArcAnimation. Swift

CustomTabBarController. Swift

CollectionViewTest. Swift

CustomCollectionViewCell. A project demonstrating how to create collection view cells with faded outlines below them

TableViewExtension. A Swift project that adds a simple extension to UITableView with the method indexPathForView(_:)

SwiftPerformanceBenchmark. A hybrid Swift/Objective-C project to compare the speed of the two languages. Computes prime numbers