Lukas Müller

iOS developer and Swift author since the Objective-C days. Spends his evenings on side projects and his mornings on SwiftUI internals.

Articles by Lukas Müller

Tutorials Sep 15, 2026 15 min read

Swift ~Copyable Types: Ownership, Borrowing, and Consuming in Swift 6

Learn Swift's ~Copyable types with borrowing, consuming, and the consume operator. Real-world resource wrappers, generics, common pitfalls, and Swift 6 examples.

Tutorials Aug 21, 2026 16 min read

Xcode Instruments for SwiftUI: Profiling Hangs, Frame Drops, and Memory Leaks in iOS 26

Profile SwiftUI apps with Xcode Instruments in Xcode 26. A real-device workflow for finding hangs, frame drops, and memory leaks, plus custom signposts with OSSignposter.

Tutorials Aug 7, 2026 15 min read

SwiftUI @Bindable vs @Binding: When to Use Each in iOS 26

@Binding forwards a value; @Bindable projects bindings from an @Observable class. Learn the exact rules, the compiler errors, and the migration path from @ObservedObject with runnable iOS 26 examples.

Tutorials Jul 21, 2026 13 min read

SwiftUI Searchable in iOS 26: Tokens, Scopes, Suggestions, and Search Focus

A hands-on tour of SwiftUI .searchable in iOS 26, from tokens and scopes to suggestions, focus control, and the new toolbar behavior that keeps the tab bar visible during search. Runnable code and the debounce pattern I use in production.

Tutorials Jul 3, 2026 12 min read

Swift RegexBuilder: The Complete Guide to Type-Safe Regular Expressions in Swift 6

Swift RegexBuilder gives you type-safe regular expressions with named captures, inline transforms, and Unicode-correct matching by default. Learn the DSL, compare it to NSRegularExpression, and avoid production traps.

Tutorials Jun 27, 2026 13 min read

SwiftUI MeshGradient: The Complete Guide to Animated Multi-Color Gradients in iOS 26

Build animated multi-color mesh gradients in SwiftUI with iOS 26's Liquid Glass. Runnable code, color-space tips, and the gotchas I've hit in production.

Tutorials Jun 18, 2026 13 min read

AlarmKit in iOS 26: Schedule Native Alarms and Countdown Timers in SwiftUI

Use AlarmKit in iOS 26 to schedule native alarms and countdown timers that override Focus and Silent mode. Full SwiftUI setup with entitlement, authorization, and Live Activity widget code.

Tutorials May 27, 2026 15 min read

App Intents in iOS 26: Siri, Spotlight, and Apple Intelligence with SwiftUI

A practical iOS 26 guide to App Intents: write your first AppIntent, expose entities to Apple Intelligence, build interactive snippets, and ship to Siri, Spotlight, and the Action Button without an extension target.