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Issue #1054
Open almost any Kotlin project and you find two files: settings.gradle.kts and build.gradle.kts. It is rarely obvious which one does what. To clear that up, we will build a tiny Kotlin app, add an external dependency on http4k, then split …
Issue #1053
Plenty of Mac apps still run on an NSApplicationDelegate. The lifecycle works, the windows are wired up, and rewriting everything into the SwiftUI App protocol just to gain one settings window is hard to justify. The friction shows up the …
Issue #1052
You call an API from your web page and the browser refuses to hand you the response, even though the server replied with a 200. The console shows a message about Access-Control-Allow-Origin. The request left your machine, reached the …
Issue #1051
You build an API on API Gateway backed by a Lambda, deploy it, then call it from your web app. The request fails before it even returns data:
Access to fetch at 'https://api.example.com/items' from origin …Issue #1050
Swift 6.4 arrives with a set of language refinements and standard library additions that make everyday code cleaner and more expressive. This article walks through the most notable changes from WWDC26.
Issue #1049
When you embed web content in a WKWebView, you often want it to stay on a set of trusted domains. A login flow that wanders off to an arbitrary site, or a help page that turns into an open browser, is both a security and a product …
Issue #1048
WWDC26 covers iOS 27, macOS 27, watchOS 27, tvOS 27, and visionOS 27. It brings new capabilities you can adopt and a couple of behavioral shifts that can break code that compiled fine before. This article starts with the two changes that …
Issue #1047
Xcode 27 ships with a set of agent skills that capture Apple’s own guidance for writing modern Swift and SwiftUI code. These skills cover things like adopting the newest SwiftUI APIs, modernizing UIKit apps, and auditing security …
Issue #1046
Every app that runs on an Apple device must be signed with a certificate. The signature tells the OS that the code comes from a known developer and hasn’t been tampered with. Xcode manages most of this automatically, but …
Issue #1045
Distributing a macOS app outside the App Store requires notarization. Apple scans the app for malicious content and attaches a ticket to it so Gatekeeper can verify it offline. Without notarization, users on macOS 10.15 and later see a …
Issue #1044
Good naming is one of the most underrated forms of documentation. A well-chosen name removes the need for a comment. A poor one forces every reader to mentally re-derive what the code does. Apple’s own frameworks are a rich source …
Issue #1043
iOS 18 introduced interactive controls that live directly in Control Center and on the Lock Screen. Unlike widgets that only display information, control widgets respond to taps, letting users trigger actions without opening the app. A …
Issue #1042
Apple’s Vision framework has quietly grown into one of the most capable on-device ML libraries available on Apple platforms. Starting in iOS 17, it gained the ability to separate the foreground subject from the background of a …
Issue #1041
The Vision framework has provided text recognition since iOS 13 and macOS 10.15. If you have ever needed to extract text from a screenshot, a photo of a receipt, or a scanned document, this is the tool to reach for. Starting with iOS 18 …
Issue #1040
SwiftData is Apple’s modern persistence framework, introduced in iOS 17. It builds on top of Core Data but exposes a Swift-native API using macros and property wrappers. For most apps targeting iOS 17 or later, it replaces Core Data …
Issue #1039
Actor isolation in Swift 6 is not binary. A type can be mostly isolated while selectively exposing some members to callers from any context. A function can accept any actor and run directly on its executor without being bound to it …
Issue #1038
Swift 6 concurrency replaces Grand Central Dispatch queues, locks, and completion handlers with a structured model built around async/await, actors, and task groups. The compiler enforces isolation rules at build time, and the runtime …
Issue #1037
Enabling Swift 6 strict concurrency checking (SWIFT_STRICT_CONCURRENCY = complete) catches data races at compile time, but it does not protect you fully at runtime. The compiler also injects dynamic isolation assertions at actor and GCD …
Issue #1036
Swift 6 makes concurrency safer by enforcing actor isolation at compile time, and sometimes at runtime. One of the subtler rules is that closures automatically inherit the actor isolation of the context where they are defined, not where …
Issue #1035
Apple Intelligence is not just a brand. Since macOS 26 (Tahoe), it ships a developer-accessible framework called Foundation Models that gives your code direct access to the on-device language model powering Writing Tools and Siri. No API …
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