Curated topic · 41 ARTICLES
Explore practical iOS Development articles grounded in clear explanations and engineering tradeoffs.
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Protocol-oriented programming (POP) designs types around what they can do, not what they inherit. This article covers where inheritance falls short, how to solve it by composing protocols, and when to avoid it, with Swift examples.
Read articleRIBs split an app by business logic rather than screens. This article explains the premise of viewless components, why RIBs suit only very large organizations, and how they differ from VIPER.
Read articleReactorKit is the framework that established unidirectional data flow as a standard for UIKit and RxSwift. This article explains the two roles, View and Reactor, why Mutation is needed as an intermediate step, and how it differs from TCA.
Read articleWhen writing test code for iOS development, XCTest can start to feel restrictive.
Read articleIf you’ve followed this iOS architecture series this far, the options are all on the table: MVC, MVVM, MVP, VIPER, Clean Architecture, MV, and TCA.
Read articleOne name is impossible to miss in architecture discussions in the SwiftUI era: TCA (The Composable Architecture), created by Point-Free.
Read articleYou often see “based on Clean Architecture” in job postings and technical blogs. But when you open the code, every team has a different interpretation. Some use UseCase, others do not, and Repository responsibilities vary as well.
Read articleAs your iOS app grows, dependency management can become a real headache.
Read articleWhen building an iOS app, you eventually encounter it: one screen mixing loading, success, failure, and empty-data states.
Read articleSwift Copy-on-Write shares storage when value types are assigned and performs an actual copy only when one side is modified. This explains how the optimization preserves value semantics while reducing the role of the Prototype pattern.
Read articleSwift static factory methods express creation intent through names and control return types, caching, and instance reuse. This summary covers the trade-offs of choosing static func make over init and how it differs from the GoF pattern.
Read articleAt some point while studying iOS development, you inevitably encounter RxSwift or Combine. They appear in nearly every job posting, but opening the code can be intimidating: unfamiliar syntax chains together map, flatMap, and sink. “Closures and…
Read articleWhen building an iOS app, view controllers can gradually become bloated.
Read articleThe Interpreter Pattern always appears near the end of design pattern books. It is easy to skip because you wonder, “When would I ever use this?”
Read articleFew patterns in iOS architecture inspire opinions as divided as VIPER.
Read articleHave you ever copied similar logic across classes and thought, “This feels wrong”? By the third copy of screen-specific data-loading code in an iOS app, your hands start to hesitate.
Read articleHave you ever hit a wall while adding an “Undo” button to an iOS app?
Read articleIn Objective-C code, [receiver message] syntax wrapped in brackets looks like an ordinary method call.
Read articleOne question comes up repeatedly in iOS architecture interviews.
Read articleWhen building apps with Swift, you write loops like for item in array dozens of times a day. Because they feel so natural, you may only start wondering how they work after a custom type fails to compile in a for-in loop: "What is actually happening inside this loop?"
Read articleThe Facade pattern provides a single, simple entry point to a subsystem involving multiple objects. Using a Swift sign-up example, this article explains how to centralize call order and how Facade differs from Adapter, Proxy, and Decorator.
Read articleWhen building an iOS app with Swift, you may have wondered why this view controller receives an event after you tap a button.
Read articleThe State Pattern groups state-specific behavior and transitions into objects or enums, reducing scattered conditionals. This article explains how to refactor Swift screen states and distinguish intentional designs that resemble the Strategy Pattern.
Read articleWhen building an app, you may need to create thousands or tens of thousands of similar objects. A typical example is placing tens of thousands of markers on a map, where the memory graph can easily keep climbing.
Read articleThe first line of every SwiftUI introduction inevitably mentions a “declarative framework.” React and Jetpack Compose also describe themselves as declarative.
Read articleWhen developing for iOS, you end up using lazy var very often.
Read articleWhen developing iOS apps, you sometimes want to add just logging or caching while keeping the core behavior intact. Start subclassing for that, and before long the inheritance tree becomes a mess.
Read articleA folder inside a folder, with more files inside. If you’ve handled this kind of tree structure in code, you’ve probably felt stuck at least once.
Read articleWhen building an app with Swift, your initialization code eventually starts looking like this.
Read articleSwift factory functions give creation logic intent-revealing names and make return types and reuse policies flexible. This covers when to choose static func over init and how it differs from the GoF Factory Method.
Read articleThe Adapter pattern converts a legacy API's interface into a protocol expected by new code. This guide covers how to create a conversion boundary in Swift, simplify replacement and testing, and distinguish it from other wrapping patterns.
Read articleiOS developers encounter the delegate pattern constantly.
Read articleIn the previous article, we covered why Massive View Controllers emerge. Because a view controller serves as both View and Controller, all code with nowhere else to go ends up there.
Read articleThere’s a joke almost every iOS developer hears at least once.
Read articleWhen developing with Swift, you encounter singletons created with a single line, static let shared, very often.
Read articleFor anyone who has wondered whether using a Singleton really is okay
Read articleIf you work on iOS development, there’s probably something you’ve wondered about at least once.
Read articleThere’s one thing that really confuses developers new to iOS.
Read articleWhen you start studying iOS development, there’s one language you’re bound to encounter: unfamiliar syntax filled with brackets and mysterious prefixes like NSString.
Read articleIt’s easy to feel confused when you first encounter Objective-C code after starting to study iOS.
Read articleWhen building an app with Swift, you may have caught an error with do-catch, only to find that the message displayed on screen was less than helpful.
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