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Getting Started with App Intents and Siri Shortcuts
SwiftApp-IntentsSiriShortcuts
Expose your app's features to Siri, Shortcuts, and Spotlight with App Intents, the Swift-native replacement for SiriKit in iOS 16 and later.
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> Swift
// 42 articles available
- 02
App Tracking Transparency in SwiftUI
SwiftSwiftUIPrivacyiOSA practical guide to App Tracking Transparency in iOS, covering the Info.plist usage description, the ATTrackingManager API, authorization statuses, and when to actually prompt the user from SwiftUI.
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withCheckedContinuation vs withUnsafeContinuation in Swift
SwiftConcurrencyasync/awaitContinuations bridge completion-handler APIs into async/await. The checked variant catches the two ways you can get it wrong, and the unsafe one trusts you completely.
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Module selectors in Swift 6.3
SwiftSwift-6ModulesSE-0491 introduces the :: operator to disambiguate names that come from different modules. Here is when you actually need it and the gotchas worth knowing.
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Data Races Swift 6 Still Can't Catch
SwiftSwift-6ConcurrencySwift 6's data-race safety is real, but it has blind spots. Here are the places the compiler can't see, and how to stop treating a clean build as proof your code is thread safe.
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OSAllocatedUnfairLock: The Type-Safe Replacement for os_unfair_lock
SwiftConcurrencyLocksOSAllocatedUnfairLock wraps os_unfair_lock with a closure-based API that makes it impossible to forget to unlock and keeps the lock's storage alive for as long as you need it.
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Intercepting Network Requests in Swift with URLProtocol
SwiftURLSessionNetworkingTestingURLProtocol is one of the oldest interception points in Foundation's networking stack. It lets you mock, log, or transform any URLSession request without touching the code that makes the request.
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Async defer in Swift 6.4
SwiftSwift-6ConcurrencySE-0493 finally lets you write defer { await cleanup() } in async functions, without spawning a detached task or threading cleanup logic through every return path.
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Structured Logging in Swift with Logger and os_log
SwiftLoggingDebuggingprint is fine for scratch work, but production apps need categories, levels, and privacy redaction. Here is how the Logger API from the os module gives you all of that without much ceremony.
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Task Cancellation Shields in Swift 6.4
SwiftSwift-6ConcurrencySwift 6.4's withTaskCancellationShield lets cleanup code run to completion even after a task has been cancelled, without spawning extra unstructured tasks.
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Using @concurrent in Swift 6.2
SwiftSwift-6ConcurrencySwift 6.2 changes how async functions pick a thread by default. The new @concurrent attribute lets you explicitly opt into background execution when you actually need it.
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Creating a @DefaultEmpty Property Wrapper for Codable in Swift
SwiftCodableProperty-WrappersJSONBuild a @DefaultEmpty property wrapper that automatically defaults missing or null array fields to an empty array when decoding JSON in Swift.
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Getting Started with Swift Testing: Apple's Modern Test Framework
SwiftTestingXcodeSwift-TestingSwift Testing replaces XCTest with a cleaner macro-based API. Learn how to write tests with @Test, #expect, parameterized inputs, and traits in Xcode 16+.
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Understanding Swift Macros: A Practical Guide
SwiftMacrosAdvancedXcodeSwift macros generate code at compile time, reducing boilerplate and catching errors early. Learn how to use built-in macros and understand how custom macros work.
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Error Handling in Swift: From Basics to Typed Throws
SwiftError-HandlingBest-PracticesSwift-6A practical guide to Swift error handling covering throw/try/catch fundamentals, custom error types, Result, async error patterns, and typed throws introduced in Swift 6.
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The Difference Between Frame and Bounds in UIKit
UIKitiOSSwiftUnderstand the key difference between a UIView's frame and bounds properties, and when to use each in your iOS apps.
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TaskGroup and Structured Concurrency Patterns in Swift
SwiftConcurrencyiOSMaster Swift's TaskGroup for parallel async work with proper cancellation, error handling, and result collection. Learn common patterns for batch operations and concurrent pipelines.
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Typed Throws in Swift 6: Declaring Specific Error Types
SwiftSwift-6iOSSwift 6 introduces typed throws, letting you declare exactly which error types a function can throw. Learn how this improves API contracts and enables exhaustive error handling.
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Swift Regex Builder: A Type-Safe DSL for Pattern Matching
SwiftiOSLearn how to use Swift's RegexBuilder DSL to create readable, type-safe regular expressions with compile-time checking and strongly-typed captures.
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StoreKit 2 for In-App Purchases and Subscriptions
StoreKitSwiftiOSSubscriptionsIn-App-PurchasesA practical guide to implementing in-app purchases and subscriptions with StoreKit 2, covering products, transactions, subscription status, and SwiftUI integration.
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Swift System Metrics 1.0: Monitoring CPU, Memory, and More on the Server
swiftswift-package-managerperformanceconcurrencyApple released Swift System Metrics 1.0, a package that collects process-level metrics like CPU time, memory usage, and file descriptors with a unified API across Linux and macOS.
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@AppStorage vs UserDefaults vs SwiftData: Choosing the Right Persistence
SwiftUISwiftPersistenceUserDefaultsSwiftDataCompare @AppStorage, UserDefaults, and SwiftData for persisting data in Swift apps. Learn when each approach makes sense and how to use them effectively.
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Understanding the "some" Keyword in Swift and SwiftUI
SwiftSwiftUIOpaque-TypesGenericsLearn what the "some" keyword means in Swift, how opaque return types work, and why SwiftUI uses "some View" everywhere.
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Choosing the Right Resource Isolation Strategy in Swift
SwiftConcurrencyArchitectureSwift offers actors, GCD, and locks for thread safety. Each solves the same problem differently. Here's how to choose.
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Resource Isolation in Swift Using Actors
SwiftConcurrencyActorsActors provide compile-time safety for shared mutable state in Swift. Here's when to use them and how they compare to older approaches.
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Resource Isolation in Swift Using GCD
SwiftConcurrencyGCDGrand Central Dispatch remains a practical choice for thread safety in Swift, especially when you need synchronous access or are working with legacy code.
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Resource Isolation in Swift Using Locks
SwiftConcurrencyThreadingLocks offer the lowest overhead for thread synchronization in Swift. Here's when that matters and how to use them safely.
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Async/Await Basics in Swift
SwiftConcurrencyasync/awaitA practical introduction to async/await in Swift, covering the fundamentals you need to write concurrent code that's both safe and readable.
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Async/Await vs GCD in Swift: When to Use Each
SwiftConcurrencyGCDasync/awaitBoth async/await and Grand Central Dispatch solve concurrency problems, but they approach them differently. Here's how to choose between them.
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Operator Precedence Gotchas When Moving Between Swift and Objective-C
SwiftObjective-CMigrationA refactoring mishap with arithmetic expressions led me down the rabbit hole of operator precedence differences between Swift and Objective-C. Here's what to watch for.
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Scheduling Alarms with AlarmKit
AlarmKitiOSSwiftLearn how to use AlarmKit to schedule alarms and countdown timers that appear on the Lock Screen and Dynamic Island on iOS 26.
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Reading Your App's Age Rating with StoreKit's ageRatingCode
StoreKitiOSSwiftApp-StoreLearn how to use AppStore.ageRatingCode to read your app's current age rating and react to rating changes for parental consent compliance.
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Using Failable Initializers to Handle Optionals in SwiftUI Views
SwiftUISwiftOptionalsUIFailable initializers offer a cleaner alternative to if-let statements when your SwiftUI views depend on optional data.
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Finding the Top View Controller in Swift
SwiftUIKitiOSHow to traverse the view controller hierarchy to find the currently visible view controller.
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Generating a Random Emoji in Swift
SwiftUnicodeStringHow to generate random emoji characters in Swift using Unicode scalar ranges.
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Getting Current Disk Usage in Swift
SwiftStorageiOSHow to check available and total disk space on iOS devices using URL resource values.
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Accessing Environment Variables in Swift
SwiftConfigurationEnvironmentDevelopmentLearn how to access and configure environment variables in Swift applications for configuration management, API keys, and feature toggles.
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How to get the name of an emoji in Swift
SwiftTextUnicodeEmojiLearn how to use kCFStringTransformToUnicodeName to get the system name for any emoji.
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Preventing the software keyboard from dismissing on iOS simulators
SwiftSimulatorKeyboardLearn how to prevent typing with your physical keyboard from dismissing the software keyboard when running your Swift app in the iOS simulator.
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All the Ways to Add Elements to an Array in Swift
SwiftArraysCollectionsA practical guide to the different methods for adding single elements, multiple elements, and inserting at specific positions in Swift arrays.
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How to Access the App Delegate in Swift
SwiftUIKitAppDelegateSwiftUILearn how to access your app's App Delegate from anywhere in your Swift code, including from SwiftUI views.
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How to Replace Characters in a String in Swift
SwiftStringTextManipulationLearn multiple approaches to replace characters and substrings in Swift strings, from simple replacements to pattern-based transformations.
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