Learn how to add haptic feedback to SwiftUI apps using the sensoryFeedback modifier and explore common and lesser-known feedback styles that make interactions more engaging.
A couple of days ago I ran into a really interesting use case: I wanted to protect a method from being called more than once at a time. You might think "actor, done" — but nope, an actor won't save you here.
Because of actor reentrancy, the moment your method hits an await and suspends, another task can sneak in and start running the same method.
I handed Xcode a task three months ago and walked to the kitchen for coffee. When I came back, the build was green, two files I hadn’t named were edited, and a test I’d forgotten existed was passing again. I sat down, read the diff, and reverted half of it.
That’s the honest shape of the last three months. The agent built into Xcode 26.3 is genuinely good at a specific kind of work, genuinely bad at another, and the gap between those two is exactly where you earn your keep now. This is a field report, not a launch-day hot take — three months of real work on VinylCrate, the wins and the reverts both.
Result builders (formerly known as function builders) are a powerful Swift feature that enables you to create elegant domain-specific languages (DSLs). They're the magic behind SwiftUI's declarative syntax and can be used to build your own custom DSLs. This is an advanced Swift feature (requires Swift 5.4+; platform availability depends on the APIs you use, such as SwiftUI). Familiarity with generics and protocols is recommended.
Swift 6.2 added a small concurrency API that solves a very specific problem: sync code sometimes needs to start async work, but still needs the first state change to happen before the caller continues.
Reactive programming became popular because it solved a real problem. Apple platforms had many asynchronous and event-driven APIs, but they lacked a unified model for composing them. RxSwift, ReactiveSwift and Combine offered that model, and for many years, that made them feel like the missing piece in iOS architecture.
Before an iOS app can receive remote notifications, we first need to register the app with Apple Push Notification service (APNs). This process includes requesting notification permission from the user, registering with APNs, and handling the generated device token.
In this article, we'll look at how to set up push notification registration in a SwiftUI app.
The real iOS problem is not “how do we make colors stronger?”It is: how do we make the frame feel richer without breaking the image?
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