Greetings, traveler! Reference counting is one of those topics every iOS developer learns early and then rarely revisits in depth. At the surface, it feels predictable: objects are retained, released, and eventually deallocated. Underneath, the implementation…

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 permanently.…

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 boundaries.…

Monolithic views are the most common issue in SwiftUI codebases, especially among inexperienced developers. While the declarative nature of SwiftUI makes it possible to quickly put together complex user interfaces, it also makes it easy to create massive…

Discover the benefits of using the Time Profiler and AI Agents for optimizing app performance effectively.

Understand the role of immediate tasks in Swift 6.2 and learn when to implement them in your concurrent programming.

Explore suspension points in Swift Concurrency and learn how they affect task execution and app performance.

Swift protocols comes with trade-offs at every turn. Understanding them is the key to a successful design.

Building a test clock in Swift sounds simple. Making it deterministic under @MainActor is where the real concurrency model reveals itself.

Whenever you consider creating a scrollable screen in SwiftUI, you might think of using a List. However, it’s not always the best choice. Lists are great for displaying uniform data. For anything else, a ScrollView with a lazy stack is almost always the best…

Greetings, traveler! Performance work in mobile apps often starts with a familiar question: why does this screen feel slow. The answer rarely sits in one place. It might be in the network, in the way the UI updates, in how data flows through the app, or in…

Greetings, traveler! In larger iOS applications, communication between features often becomes harder than the feature itself. A service finishes an operation, a coordinator needs to react, several screens may need to refresh, and passing every dependency…

Greetings, traveler! Feature flags are a foundational tool for modern mobile development. They allow teams to control behavior at runtime, roll out features gradually, run experiments, and decouple deployment from release. In iOS applications, a well-designed…

Most Swift developers never look beyond the syntax—but what if your code could inspect itself at runtime? This extract from Swift Internals explores Mirror, reflection, and @dynamicMemberLookup: the metaprogramming tools that let you build generic inspectors…

A theoretical deep-dive into how the internet happens via your iPhone

Learn how to use Apple’s Accelerate framework in Swift for high-performance vector math, DSP, matrix operations, FFT, and numerical computing with practical examples and deep explanations.

Learn how to use ContentUnavailableView in SwiftUI to build beautiful empty states, search placeholders, and error screens with practical examples and best practices.

Professional iOS Engineer specializing in SwiftUI, VisionOS, and modern Apple platforms. Expert in HealthKit, tvOS, watchOS and even some VisionOS development with 85+ technical articles and comprehensive portfolio.

Why chained Text.kerning modifiers may or may not be equivalent across SDK semantics

SwiftUI apps often need to perform async operations that will throw errors when things go wrong. This post shows how you can present aler...