ARCHIVE · 10
Follow the trail from foundational concepts to practical engineering decisions.
Associated types are type placeholders built into protocols. This article explains the infamous generic constraint error, how SE-0309 and SE-0346 removed the restrictions, and how to use primary associated types.
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Method swizzling is a technique that swaps, at runtime, the mapping table connecting selectors and IMPs. This guide covers the conventional implementation, the side effect of _cmd lying, and the boundaries of acceptable use.
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Mediator coordinates tangled object relationships centrally, Observer broadcasts state changes one-to-many, and Facade wraps complex internals behind a simple entry point. Compare the three patterns and selection criteria with Swift examples.
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DI, IoC, and DIP are concepts at different levels. DIP is the principle that determines what to depend on, IoC is about who holds control, and DI is the technique of supplying dependencies. This guide covers the distinctions with examples and interview answers.
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ReactorKit 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.
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