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February 8, 2026
How to Change the Background Color of a View in SwiftUI
SwiftUIUIColorsLayout
Learn different ways to set background colors on SwiftUI views, from simple color fills to gradients and materials.
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// Short, focused solutions to common development problems. Get quick answers and code snippets for your SwiftUI and Swift projects.
109 Articles
- 02February 7, 2026
I'm Really Excited About React Navigation v8
React-NativeReact-NavigationTypeScriptReact Navigation v8 is in alpha and I'm genuinely excited. Native bottom tabs, smarter TypeScript inference, and a long-awaited fix for deep linking behind auth screens. This one's going to be good.
ACCESS_TUTORIAL - 03February 7, 2026
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.
ACCESS_TUTORIAL - 04February 5, 2026
Configuring Claude Code Permissions for React Native Development
AIDevelopment-EnvironmentReact-NativeClaude-CodeReact Native projects require running lots of shell commands. Here's how to configure Claude Code's permission system so you're not constantly approving the same operations.
ACCESS_TUTORIAL - 05February 4, 2026
How to Use Xcode's MCP Server to Build Xcode into Your AI Workflow
XcodeAIDevelopment-EnvironmentXcode 26.3 ships with a built-in MCP server that exposes project structure, build actions, and test results to external AI tools. Here's how to set it up.
ACCESS_TUTORIAL - 06January 28, 2026
SwiftUI vs UIKit: Which Should You Choose in 2026?
SwiftUIUIKitiOS-DevelopmentArchitectureA practical guide to choosing between SwiftUI and UIKit in 2026, based on your project requirements, team experience, and the current state of both frameworks.
ACCESS_TUTORIAL - 07January 27, 2026
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.
ACCESS_TUTORIAL - 08January 26, 2026
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.
ACCESS_TUTORIAL - 09January 25, 2026
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.
ACCESS_TUTORIAL - 10January 24, 2026
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.
ACCESS_TUTORIAL - 11January 21, 2026
NavigationView vs NavigationStack: What Changed and Why
SwiftUINavigationiOS-DevelopmentNavigationStack replaced NavigationView in iOS 16 with a more powerful programmatic navigation model. Here's what changed and how to migrate.
ACCESS_TUTORIAL - 12January 17, 2026
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.
ACCESS_TUTORIAL - 13January 15, 2026
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.
ACCESS_TUTORIAL - 14January 13, 2026
Fixing 16KB Page Alignment Errors in React Native for Android
React-NativeAndroidGoogle-PlayGoogle Play now requires 16KB page size support for Android apps. Here's how to fix alignment errors in your React Native project before your next release gets rejected.
ACCESS_TUTORIAL - 15January 12, 2026
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.
ACCESS_TUTORIAL - 16January 11, 2026
Automatically Switch Node Versions with nvm for React Native Projects
macOSDevelopment-EnvironmentReact-NativeAvoid cryptic build failures by setting up nvm to automatically use the right Node version when you cd into a project.
ACCESS_TUTORIAL - 17January 10, 2026
How to Change the Default Screenshot Folder on macOS
macOSDevelopment-EnvironmentStop cluttering your Desktop with screenshots. Here's how to save them somewhere else using Terminal or the Screenshot app.
ACCESS_TUTORIAL - 18January 4, 2026
Accessing the Camera Roll in SwiftUI
SwiftUIUIKitImagesPrivacyConfigurationLearn how to access photos from the camera roll in SwiftUI, including required permissions, Info.plist configuration, and using PhotosPicker for iOS 16+ or UIImagePickerController for earlier versions.
ACCESS_TUTORIAL - 19January 2, 2026
Detecting When a Screenshot is Taken in SwiftUI
SwiftUIUIKitSecurityPrivacyLearn how to detect when users take screenshots in your SwiftUI app by observing UIApplication notifications.
ACCESS_TUTORIAL - 20December 30, 2025
Prevent macOS from Creating .DS_Store Files on Network and USB Drives
macOSConfigurationDevelopment-EnvironmentStop macOS from littering .DS_Store files on network shares and USB drives with a simple Terminal command. Keep your external storage clean and your repositories tidy.
ACCESS_TUTORIAL - 21December 28, 2025
Detect Successful Share Sheet Completion in SwiftUI
SwiftUIUIKitShareActivityViewControllerLearn how to detect when a user successfully shares content using a share sheet in SwiftUI by wrapping UIActivityViewController.
ACCESS_TUTORIAL - 22December 22, 2025
Prevent Drag-to-Dismiss on SwiftUI Sheets
SwiftUISheetUIModalLearn how to prevent users from dismissing modal sheets by swiping down in SwiftUI using interactiveDismissDisabled.
ACCESS_TUTORIAL - 23December 21, 2025
Building Interactive Glass Controls in SwiftUI
SwiftUIiOSLiquid-GlassUI-DesignMake your glass elements respond to touch with scaling, shimmer effects, and touch-point illumination using the interactive() modifier and glass button styles.
ACCESS_TUTORIAL - 24December 19, 2025
Creating Morphing Glass Transitions with glassEffectID
SwiftUIiOSLiquid-GlassAnimationsThe glassEffectID modifier enables glass views to smoothly morph into one another during state changes, creating fluid transitions that feel native to iOS 26.
ACCESS_TUTORIAL - 25December 18, 2025
Disable Touches with allowsHitTesting in SwiftUI
SwiftUIGesturesUILearn how to use the allowsHitTesting modifier to make views ignore touches, letting taps pass through to elements behind them.
ACCESS_TUTORIAL - 26December 15, 2025
Coordinating Glass Elements with GlassEffectContainer
SwiftUIiOSLiquid-GlassUI-DesignWhen you have multiple glass elements that should blend and animate together, GlassEffectContainer coordinates their rendering for seamless visual results.
ACCESS_TUTORIAL - 27December 14, 2025
Getting Started with Liquid Glass in SwiftUI
SwiftUIiOSLiquid-GlassUI-DesigniOS 26 introduces Liquid Glass, a translucent design language for navigation elements. Here's how to apply the glassEffect modifier to your custom views.
ACCESS_TUTORIAL - 28December 10, 2025
Fixing "No Such Module" Errors in Xcode
XcodeSwift-Package-ManagerDebuggingCocoaPodsWhen Xcode says it can't find a module you've clearly installed, the problem is usually in your build configuration, not your package manager.
ACCESS_TUTORIAL - 29December 4, 2025
Simulating Device Conditions in Xcode for Real-World Testing
XcodeTestingPerformanceDevelopmentLearn how to use Xcode's Device Conditions feature to simulate thermal state and network conditions to test your app under real-world stress scenarios.
ACCESS_TUTORIAL - 30November 26, 2025
How to Round Specific Corners of a View in SwiftUI
SwiftUIUIShapesLayoutLearn how to round only certain corners of a SwiftUI view using UnevenRoundedRectangle, custom shapes, and clipShape.
ACCESS_TUTORIAL - 31November 25, 2025
How to Resize an Image in SwiftUI
SwiftUIImageUILayoutLearn how to resize images in SwiftUI using resizable(), frame(), and different content modes like scaledToFit and scaledToFill.
ACCESS_TUTORIAL - 32November 22, 2025
How to Add an Activity Indicator (Spinner) in SwiftUI
SwiftUIUILoadingProgressViewLearn how to show loading spinners in SwiftUI using ProgressView, including customization options and common loading patterns.
ACCESS_TUTORIAL - 33November 22, 2025
Detecting Shake Gestures in SwiftUI
SwiftUIGesturesUIKitLearn how to detect when users shake their device in SwiftUI by bridging to UIKit's motion events and creating a reusable view modifier.
ACCESS_TUTORIAL - 34November 18, 2025
Fixing iOS Simulator That Won't Launch or Boot
XcodeSimulatorDebuggingWhen the iOS Simulator refuses to launch, gets stuck booting, or shows a black screen, here's how to diagnose and fix it.
ACCESS_TUTORIAL - 35November 15, 2025
Scheduling Alarms with AlarmKit
AlarmKitiOSSwiftLearn how to use AlarmKit to schedule alarms that appear in the system Clock app, giving your app native alarm integration on iOS 26.
ACCESS_TUTORIAL - 36November 14, 2025
Supporting Dark Mode in a SwiftUI App
SwiftUIDark-ModeUIColorsLearn how to properly support dark mode in SwiftUI using semantic colors, adaptive color assets, and color scheme detection.
ACCESS_TUTORIAL - 37November 13, 2025
Using SF Symbols in SwiftUI
SwiftUISF-SymbolsIconsUILearn how to use SF Symbols in your SwiftUI apps, including sizing, coloring, animations, and finding the right symbol for your needs.
ACCESS_TUTORIAL - 38November 10, 2025
@State vs @Binding in SwiftUI: When to Use Each
SwiftUIState-ManagementData-FlowProperty-WrappersUnderstand the difference between @State and @Binding in SwiftUI, when to use each, and how they work together to manage data flow between views.
ACCESS_TUTORIAL - 39November 8, 2025
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.
ACCESS_TUTORIAL - 40November 3, 2025
Fixing Xcode Indexing That's Stuck or Slow
XcodePerformanceDebuggingWhen Xcode's indexing gets stuck or takes forever, your autocomplete and jump-to-definition stop working. Here's how to get it unstuck.
ACCESS_TUTORIAL - 41October 30, 2025
Add Spacing to Toolbars with ToolbarSpacer in SwiftUI
SwiftUIToolbarUILayoutiOS-26Learn how to use ToolbarSpacer to add fixed and flexible spacing between toolbar items in SwiftUI, new in iOS 26.
ACCESS_TUTORIAL - 42October 25, 2025
Working with Optional ObservableObject in SwiftUI
SwiftUIState-ManagementObservableObjectLearn different approaches for handling optional ObservableObject instances in SwiftUI, from conditional rendering to wrapper patterns.
ACCESS_TUTORIAL - 43October 22, 2025
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.
ACCESS_TUTORIAL - 44October 15, 2025
Control Sheet Height with presentationDetents in SwiftUI
SwiftUISheetUIModaliOS-16Learn how to use the presentationDetents modifier to control sheet heights in SwiftUI, creating interactive bottom sheets similar to Apple Maps and Music.
ACCESS_TUTORIAL - 45October 8, 2025
Fixing SwiftUI Previews That Won't Load
XcodeSwiftUIDebuggingPreviewsWhen SwiftUI previews fail with cryptic errors or just spin forever, here's how to diagnose and fix the most common causes.
ACCESS_TUTORIAL - 46October 3, 2025
Building Child-Safe Communication Features with PermissionKit
PermissionKitSwiftUIChild-SafetyiOSFamily-SharingPermissionKit lets children request parental permission to communicate with new contacts directly through Messages. Here's how to integrate it into your social or messaging app to create safer communication experiences.
ACCESS_TUTORIAL - 47September 28, 2025
Control Tappable Area with contentShape in SwiftUI
SwiftUIGesturesUILearn how to use the contentShape modifier to expand or customize the tappable area of your SwiftUI views, making buttons and interactive elements more user-friendly.
ACCESS_TUTORIAL - 48September 22, 2025
Understanding Safe Areas in SwiftUI
SwiftUILayoutUISafe-AreaSafe areas keep your content visible and interactive. Here's how they work in SwiftUI and when you should ignore them.
ACCESS_TUTORIAL - 49September 13, 2025
Detecting When App Enters Background and Saving State in SwiftUI
SwiftUILifecycleState-ManagementPersistenceLearn how to detect app lifecycle changes in SwiftUI, save state when your app enters the background, and restore it when users return, using scenePhase and UIApplication notifications.
ACCESS_TUTORIAL - 50September 11, 2025
Previewing Partially Generated Content with Foundation Models in SwiftUI
SwiftUIFoundation-ModelsXcodePreviewsAIWhen building UIs that stream AI-generated content using Apple's Foundation Models framework, testing intermediate states in Xcode Previews requires some creative workarounds. Here's how to preview partially generated content without calling the actual model.
ACCESS_TUTORIAL - 51September 5, 2025
Using Custom Fonts in SwiftUI
SwiftUIFontsTypographyUIHow to add custom fonts to your SwiftUI app, use system font variants, and ensure your typography scales properly with Dynamic Type.
ACCESS_TUTORIAL - 52August 19, 2025
Centering Views in SwiftUI
SwiftUILayoutUIUnderstanding the difference between frame alignment and stack alignment is the key to centering views exactly where you want them in SwiftUI.
ACCESS_TUTORIAL - 53August 12, 2025
Adding Horizontal Padding to TextEditor in SwiftUI with contentMargins
SwiftUITextEditorLayoutiOS-17Learn how to add horizontal padding inside a TextEditor without affecting the scrollbar using the contentMargins modifier introduced in iOS 17.
ACCESS_TUTORIAL - 54August 8, 2025
Detecting Low Power Mode in SwiftUI and Adapting UI Performance
SwiftUIPerformanceBatteryiOSLearn how to detect when users enable Low Power Mode and automatically reduce animations, refresh rates, and visual effects to preserve battery life in your SwiftUI app.
ACCESS_TUTORIAL - 55July 18, 2025
Presenting Multiple Sheets in SwiftUI
SwiftUISheetsNavigationUIHow to present a second sheet from within an already-presented sheet in SwiftUI.
ACCESS_TUTORIAL - 56July 11, 2025
Symbolicating Swift Crash Reports in Xcode
XcodeDebuggingCrash-ReportingProductionLearn how to symbolicate crash logs from App Store Connect and Xcode Cloud to debug production crashes effectively.
ACCESS_TUTORIAL - 57July 6, 2025
Adding an App Delegate to a SwiftUI App
SwiftUIAppDelegateUIKitLifecycleLearn how to integrate UIKit's App Delegate into your SwiftUI app for handling app lifecycle events and system callbacks.
ACCESS_TUTORIAL - 58July 5, 2025
Access Environment Values in View Extensions
SwiftUIEnvironmentViewModifierExtensionsLearn how to access SwiftUI environment values in View extensions using ViewModifiers for clean, reusable code.
ACCESS_TUTORIAL - 59July 3, 2025
How to generate QR codes in SwiftUI
SwiftUICoreImageQRImagesLearn how to create and display QR codes in SwiftUI using Core Image filters.
ACCESS_TUTORIAL - 60July 2, 2025
How to search SF Symbols in Xcode
XcodeSwiftUIDesignLearn how to search SF Symbols in Xcode.
ACCESS_TUTORIAL - 61June 27, 2025
Building a Floating Action Button (FAB) that Respects Keyboard in SwiftUI
SwiftUIKeyboardUILayoutLearn how to create a Material Design-style floating action button in SwiftUI that intelligently moves above the keyboard and avoids blocking text input fields.
ACCESS_TUTORIAL - 62June 20, 2025
Building a Pull-to-Load-More ScrollView in SwiftUI
SwiftUIScrollViewUIPaginationHow to detect when users scroll to the bottom of a list and automatically load more content.
ACCESS_TUTORIAL - 63June 15, 2025
Managing Keyboard Toolbar Items in SwiftUI (iOS 15+)
SwiftUIKeyboardTextFieldTextEditorLearn how to add custom toolbar buttons above the keyboard in SwiftUI using the .toolbar modifier with keyboard placement for Done buttons, formatting controls, and more.
ACCESS_TUTORIAL - 64June 5, 2025
Preventing Screenshot Capture in SwiftUI Views
SwiftUISecurityPrivacyUIKitLearn how to prevent users from taking screenshots of sensitive content in your SwiftUI app using field-level security and UIKit bridging for financial, medical, or private data protection.
ACCESS_TUTORIAL - 65May 25, 2025
Creating an iMessage-Style Input Accessory View in SwiftUI
SwiftUIKeyboardUITextFieldLearn how to create a custom input accessory view that stays above the keyboard, similar to iMessage's input bar.
ACCESS_TUTORIAL - 66May 15, 2025
Finding the Top View Controller in Swift
SwiftUIKitiOSHow to traverse the view controller hierarchy to find the currently visible view controller.
ACCESS_TUTORIAL - 67May 8, 2025
Implementing Pull-to-Refresh Without List in SwiftUI
SwiftUIScrollViewUIKitAsyncLearn how to add pull-to-refresh functionality to custom ScrollViews in SwiftUI without using List, perfect for custom layouts and complex scroll content.
ACCESS_TUTORIAL - 68April 29, 2025
Creating Skeleton Loading Views (Shimmer Effect) in SwiftUI
SwiftUIAnimationUILoadingLearn how to build skeleton loading screens with animated shimmer effects in SwiftUI using gradients, AnimatableModifier, and reusable view modifiers for a polished loading experience.
ACCESS_TUTORIAL - 69April 19, 2025
Inspecting all SwiftUI Environment Values
SwiftUIEnvironmentDebuggingDevelopmentLearn how to dump all SwiftUI environment values for debugging purposes.
ACCESS_TUTORIAL - 70April 18, 2025
Showing a relative "Time ago" date in SwiftUI
SwiftUIDateFormattingFoundationLearn how to display human-readable relative timestamps like "5 minutes ago" or "yesterday" using RelativeDateTimeFormatter in your SwiftUI apps.
ACCESS_TUTORIAL - 71April 12, 2025
Generating a Random Emoji in Swift
SwiftUnicodeStringHow to generate random emoji characters in Swift using Unicode scalar ranges.
ACCESS_TUTORIAL - 72April 5, 2025
Implementing Undo/Redo in SwiftUI with UndoManager
SwiftUIUndoManagerState-ManagementLearn how to implement undo/redo functionality in SwiftUI using UndoManager, including environment injection, registering actions, and creating undo buttons for professional editing experiences.
ACCESS_TUTORIAL - 73March 20, 2025
Getting Current Disk Usage in Swift
SwiftStorageiOSHow to check available and total disk space on iOS devices using URL resource values.
ACCESS_TUTORIAL - 74March 17, 2025
Firebase Crashlytics dSYM files not uploading using Xcode 15+
FirebaseXcodeCrashlyticsDebuggingLearn how to fix the Firebase Crashlytics dSYM files not properly being uploaded to Firebase after upgrading to Xcode 15/16.
ACCESS_TUTORIAL - 75March 9, 2025
Accessing Environment Variables in Swift
SwiftConfigurationEnvironmentDevelopmentLearn how to access and configure environment variables in Swift applications for configuration management, API keys, and feature toggles.
ACCESS_TUTORIAL - 76February 13, 2025
Aligning Text in SwiftUI
SwiftUITextLayoutUILearn how to align single and multiline text in SwiftUI.
ACCESS_TUTORIAL - 77February 12, 2025
How to make a SwiftUI List scroll automatically?
SwiftUIScrollViewListUILearn how to use ScrollViewReader and ScrollViewProxy to scroll a SwiftUI list to a specific item automatically.
ACCESS_TUTORIAL - 78February 10, 2025
Detect when a context menu is open in SwiftUI
SwiftUIContextMenuUIGesturesLearn how to detect when a context menu is open in SwiftUI.
ACCESS_TUTORIAL - 79February 10, 2025
Creating a WebView with a transparent background in SwiftUI
SwiftUIWebViewUIKitStylingLearn how to create a WebView/WKWebView with a transparent/clear background in SwiftUI.
ACCESS_TUTORIAL - 80February 9, 2025
Adding a TextField to an Alert in SwiftUI
SwiftUITextFieldAlertUILearn how to accept user input in an alert using TextField or SecureField.
ACCESS_TUTORIAL - 81January 19, 2025
Different Ways to Dismiss the Keyboard in React Native
React-NativeThe keyboard doesn't always dismiss itself when you expect it to. Here are several approaches to dismissing it programmatically and through user interaction.
ACCESS_TUTORIAL - 82December 17, 2024
Adding a character limit to a TextEditor or TextField in SwiftUI
SwiftUITextFieldTextEditorValidationLearn how to create a modifier that limits the characters that can be entered in a TextEditor or TextField view in SwiftUI.
ACCESS_TUTORIAL - 83December 12, 2024
How to scale text to fit its parent view with SwiftUI
SwiftUITextLayoutUILearn the ways to scale a text view's font size to fit its parent view in SwiftUI.
ACCESS_TUTORIAL - 84December 11, 2024
How to display a GIF from a URL in SwiftUI
SwiftUIImagesWebViewUIKitLearn how to use a WKWebView as a quick way to load a GIF from a URL and display it in a SwiftUI view.
ACCESS_TUTORIAL - 85December 10, 2024
Creating custom styles for DisclosureGroup views
SwiftUIUIComponentsStylingLearn how to use DisclosureGroupStyle to create custom DisclosureGroup views in SwiftUI.
ACCESS_TUTORIAL - 86December 8, 2024
How to get the name of an emoji in Swift
SwiftTextUnicodeEmojiLearn how to use kCFStringTransformToUnicodeName to get the system name for any emoji.
ACCESS_TUTORIAL - 87December 8, 2024
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.
ACCESS_TUTORIAL - 88November 18, 2024
nil vs Nil vs NULL vs NSNull in Objective-C
Objective-CFundamentalsMemoryObjective-C has four ways to represent nothing. Understanding when to use each prevents subtle bugs and clarifies your code's intent.
ACCESS_TUTORIAL - 89October 8, 2024
Detecting if SwiftUI is running in a Preview in Xcode
SwiftUIXcodePreviewsDevelopmentLearn how to detect if a SwiftUI app is running in a Xcode Preview.
ACCESS_TUTORIAL - 90October 8, 2024
Fixing CocoaPods "Unknown ISA PBXFileSystemSynchronizedRootGroup" Error
CocoaPodsXcodeiOSTroubleshootingHow to resolve the pod install error caused by Xcode 16's new folder-based group structure.
ACCESS_TUTORIAL - 91October 7, 2024
How to force navigation bar to show background in SwiftUI?
SwiftUINavigationUIStylingLearn how to force the navigation bar to show a background color in SwiftUI.
ACCESS_TUTORIAL - 92October 6, 2024
Using DisclosureGroup to hide and show content
SwiftUIUIComponentsHow to use the SwiftUI DisclosureGroup view to create collapsable content.
ACCESS_TUTORIAL - 93September 15, 2024
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.
ACCESS_TUTORIAL - 94September 9, 2024
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.
ACCESS_TUTORIAL - 95August 20, 2024
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.
ACCESS_TUTORIAL - 96December 12, 2023
Key-Value Observing Deep Dive
Objective-CFoundationAdvancedKVO lets you observe property changes without delegation or notifications. Here's how it works under the hood and how to use it correctly.
ACCESS_TUTORIAL - 97November 17, 2023
Blocks - Closures Before Swift Existed
Objective-CConcurrencyFundamentalsBefore Swift closures, Objective-C had blocks. The syntax is different, but the power is the same. Here's how to use them effectively.
ACCESS_TUTORIAL - 98October 5, 2023
The NSObject Class Hierarchy Explained
Objective-CFoundationFundamentalsEvery Objective-C class inherits from NSObject (usually). Here's what NSObject provides and why it matters for every object you create.
ACCESS_TUTORIAL - 99August 29, 2023
Categories vs Class Extensions in Objective-C
Objective-CFundamentalsBest-PracticesBoth let you add methods to classes, but categories and class extensions serve different purposes. Here's when to use each.
ACCESS_TUTORIAL - 100July 11, 2023
Message Passing - The Heart of Objective-C
Objective-CRuntimeFundamentalsUnlike C++ virtual methods, Objective-C uses dynamic message passing. Understanding this mechanism unlocks the language's full power.
ACCESS_TUTORIAL - 101May 18, 2023
Understanding Retain Cycles in Objective-C
Objective-CMemoryARCRetain cycles are the most common memory leak in Objective-C. Learn how they form, how to detect them, and patterns that prevent them.
ACCESS_TUTORIAL - 102April 6, 2023
Namespacing in Objective-C - The Prefix Problem
Objective-CBest-PracticesArchitectureObjective-C lacks namespaces, so the community invented conventions. Here's how prefixes and other patterns help avoid collisions in a flat symbol space.
ACCESS_TUTORIAL - 103February 14, 2023
The 10 Longest Symbol Names in Apple's Frameworks
Objective-CHumorApple-FrameworksObjective-C is famous for verbose naming. Let's celebrate (or mourn) the longest method and class names hiding in Apple's standard libraries.
ACCESS_TUTORIAL - 104January 27, 2023
Why Objective-C Has try-catch But Nobody Uses It
Objective-CError-HandlingBest-PracticesObjective-C supports exception handling with @try/@catch, but the community settled on NSError pointers instead. Here's why.
ACCESS_TUTORIAL - 105November 3, 2022
Ways to Shoot Yourself in the Foot with Method Swizzling
Objective-CRuntimeDebuggingSwizzling is powerful but dangerous. Here are the common pitfalls and how to avoid turning your clever hack into a debugging nightmare.
ACCESS_TUTORIAL - 106September 19, 2022
The Power of Method Swizzling in Objective-C
Objective-CRuntimeAdvancedMethod swizzling lets you replace method implementations at runtime. Here's how it works and when this powerful technique shines.
ACCESS_TUTORIAL - 107July 8, 2022
Class Clusters in Objective-C - The Pattern Behind Foundation
Objective-CDesign-PatternsFoundationUnderstand the class cluster pattern that makes NSString, NSArray, and NSDictionary work, and learn how to implement your own.
ACCESS_TUTORIAL - 108May 22, 2022
NSTaggedPointerString - The Hidden Optimization You've Never Heard Of
Objective-CMemoryPerformanceDiscover how the Objective-C runtime secretly stores small strings directly in pointer values, eliminating heap allocations entirely.
ACCESS_TUTORIAL - 109March 15, 2022
Barrier Queues in GCD - Thread-Safe Collections Without Locks
Objective-CConcurrencyGCDLearn how dispatch barrier queues provide elegant reader-writer synchronization in Objective-C without explicit locks or semaphores.
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