A series of articles on SwiftUI application development — SwiftUI was introduced at WWDC 19 and launched with iOS 13. Since its introduction SwiftUI has generated a ton of interest, a bit of controversy, and a lot of articles. Including my own. I’ve written rather extensively on SwiftUI, on SwiftUI application architectures, and on issues and hidden gotchas that…

Apple seems to think so. — OpenAI and ChatGPT has a serious problem. According to a report by the Wall Street Journal based on leaked information, Apple has blocked employees from using ChatGPT and similar products. Why? Because doing so involves giving them access to potentially sensitive or confidential information. …

Deciding where and how to update the main thread. — Pretty much every article that discusses Swift async/await will throw in a comment regarding @MainActor and how it can be used to ensure that any updates to the user interface will occur on the main thread. That’s all well and good… but just where should the @MainActor attribute go? On…

Do you know when it’s safe to use ObservedObject? Are you sure? — I’m seeing a lot more SwiftUI code recently, and that’s great! But I’m also seeing a lot of code online in projects and in PRs that tells me quite a few people still don’t understand the difference between ObservedObject and StateObject. Or when it’s safe to use ObservedObject… And when…

Want to ace that common interview question? — Do enough interviews and you’ll no doubt hit one of the most common iOS development interview questions. We’ve all been there. The interviewer, no doubt a senior iOS developer with a glint in his eye, hands you a piece of paper and says, “Okay. …

Yes, it’s pretty much what you think. — So I was taking a break, browsing Medium to see if anything was new, different, or exciting, and I came across an article whose headline discussed returning data from an asynchronous Swift function. “Cool!” I thought. (Hey, to me such things are exciting. Deal with it.) In fact, this particular…

Relying on the Xcode Rosetta hack? Then you’re in trouble. — Just saw this in the official Xcode 14.3 beta release notes. Deprecations Xcode isn’t supported under Rosetta. See Developer Technote's “Resolving architecture build errors on Apple silicon“ for more information. (92772361) If you’re an app developer and this means nothing to you, then great! But if you saw this and those…

Just a list of Medium articles published in 2022, gathered all in one place. — Factory: Circular Dependency Chains * How to find and eliminate them Another ChatGPT SwiftUI Session Exploring the future of conversational programming. ChatGPT and SwiftUI Not that I’m worried, but… Factory: Multiple Module Registration How to initialize everything before anything is initialized. SwiftUI Binding Extensions

Or how I reached 100% code coverage in Factory. — I wrote an earlier article on the importance of unit testing in a library and I still believe that it’s a best practice. And doubly so when that library is a critical piece of code on which an entire application depends. The library in question is Factory, a compile-time safe…