SwiftUI Dependency Injection: From EnvironmentObject to Protocol DI
As your SwiftUI app grows, the phrase dependency injection alone can make your shoulders tense.
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Swift Interpreter Pattern: Build a Mini-Language Interpreter
The 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 articleSwift Visitor Pattern: When Double Dispatch Is Needed
In iOS development, you eventually need to keep adding operations to objects of many kinds, such as shapes or nodes.
Read articleSwift Template Method Pattern: Building the Skeleton with a Protocol Extension
Have 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 articleSwift Memento Pattern: A Complete Guide (Undo Implementation Example)
Have you ever hit a wall while adding an “Undo” button to an iOS app?
Read articleSwift Mediator Pattern Explained (Delegate Object Communication to a Mediator)
If you've grown an iOS app beyond the basics, you've probably encountered this moment.
Read articleSwift Iterator Pattern: How Sequence Works
When 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 articleSwift Facade Pattern: Hiding a Complex Subsystem Behind One Method
The 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 articleSwift Chain of Responsibility Pattern and the UIResponder Chain
When building an iOS app with Swift, you may have wondered why this view controller receives an event after you tap a button.
Read article[Modularization #4] Start iOS Modularization with SPM
The previous modularization articles covered the principles of boundaries, dependency direction, and layer structure. Now it is time to apply them to an iOS project.
Read articleEscape if-statement hell with Swift’s State Pattern
The 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 articleSwift Flyweight Pattern: Save Memory by Sharing Objects
When 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.
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