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How to force navigation bar to show background in SwiftUI?
SwiftUINavigationUIStyling
Learn how to force the navigation bar to show a background color in SwiftUI.
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// 109 articles available
- 02
Using DisclosureGroup to hide and show content
SwiftUIUIComponentsHow to use the SwiftUI DisclosureGroup view to create collapsable content.
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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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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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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