Implementing new features in StoreKit — Before you read this story, note an updated version [as in code] can be found here. Subscriptions, Receipts, and StoreKit in iOS 14 The gold standard of in-app purchases and subscriptionsmedium.com Much of the buzz at WWDC2020 was given over to SwiftUI 2.0 …

A look at some different ways to link a class with a SwiftUI interface — I was playing around with SpriteKit, and it occurred to me that it might be a good exercise to remind myself of how many different ways I could link my SwiftUI code with my SpriteKit scene/class. …

Continuation of the article “Using face recognition to control an app” — Bon, this is a continuation of this article, where I described how I built an app that tracked my gaze. The app worked reasonably well and yet didn’t. …

Bring your app to life through an investigation into the challenges faced — In 2002 Steven Spielberg produced a movie about beings able to see into the future — a subject that is a little beyond this article, although I would like to focus on one of its muses — cameras with iris scanners allowing the authorities and the police to follow you…

A comparison between the two tools — When I began this article, I intended to talk about animating the chess set app I have spent the last few weeks documenting. But as I looked into the subject, I realized that Apple had very different ideas on this to their previous frameworks with both SceneKit and SpriteKit. …

A follow-up to “Building 3D Chess” with await/async and actors — I have been reworking an article I wrote earlier in the year on using SceneKit to create a 3D game of chess. A rework based to some extent on the WWDC2019 presentation on RealityKit — although the presentation you need to watch for this article is this one. …

Using SwiftUI, RealityKit, ARKit, and Multipeer frameworks — I have spent the better part of this year [2022] exploring SceneKit. A journey I have documented with almost two dozen articles on the subject you’ll find here on medium. Having covered most of the elements within SceneKit, I decided to move over to RealityKit/ARKit in 2023. Although I wasn’t…

Explore the various types of Constraints and how to use them in a SwiftUI-powered application — Most would agree that augmented reality has yet to find its niche, with the reasoning most frequently quoted is: the absence of a killer app. A truism, although I suspect another reason is that it is tough to code augmented reality apps. It is a challenge because the math behind…

Validating user input using the new Regex syntax — You can trace the history of Regex back to an American mathematician, Stephen Cole Kleene, who proposed the idea of text representing patterns using mathematical expressions of sorts in 1951. …