You’ve probably heard the rule: SwiftUI only uses @State’s initial value once. After that, it ignores whatever you pass in subsequent init() calls. But what exactly happens to _state.wrappedValue i...

SwiftUI’s default NavigationStack and NavigationView provide a system back button, but customizing its appearance requires replacing it entirely. Unlike UIKit’s navigationItem.leftBarButtonItem, th...

Debug vs. Release: When Code Only Crashes in Release extension ModelContext { func fetch<Model: PersistentModel & Identifiable<UUID>>(id: UUID) throws -> Model? { le...

Integrating Firebase Realtime Database with Swift’s Codable protocol should be straightforward, but a few non-obvious behaviors can lead to hours of frustrating debugging. Here are three key pitfal...

When building user interfaces, it’s common to show or hide views based on state. In SwiftUI, there are several options: A simple if-else statement The .hidden() modifier The .opacity(_:) mo...

Use with caution: Avoid accessing MainActor synchronously unless absolutely necessary. In rare cases—particularly when integrating with legacy code—you may need to synchronously access MainActor-...

The fixedSize modifier in SwiftUI forces a view to adopt its ideal size, preventing it from being compressed or truncated. For example, you can use it to make sure a long text isn’t cut off: Text...

Recap WWDC20 Data Essentials in SwiftUI Views only exist transiently. After SwiftUI completes a rendering pass, the structs themselves go away. But because we marked this property as State, Sw...

TaskLocal is a mechanism within Swift’s concurrency system that allows you to store and access values that are local to a task and its child tasks. It’s similar to thread-local storage from the pre...

When writing Swift code, you may encounter situations where you need to represent a combination of options in a clean, efficient, and type-safe manner. This is where Swift’s OptionSet comes into pl...