Multicast Delegate and Delegates Composition

Delegate is among the most commonly used patterns in iOS apps. Although one-to-one delegation might be suitable for the majority of cases, sometimes you need to delegate to more than one object and that is where the canonical pattern begins to falter. [Read More]

Code Injection

Code Injection in Swift is a technique of adding custom pieces of code to methods without modifying a line of code of their enclosing types. It is an alternative to inheritance, where a common behavior is extracted to a superclass, but reusable and nonintrusive. [Read More]

Core Data Stack in Swift 4

Core Data is Apple’s object graph management and persistency framework. When it comes to structured data persistence, Core Data is an obvious choice. The goal of this article is to give you an overview of the Core Data architecture as well as to provide a list of basic operations together... [Read More]

UIView Auto Layout life cycle

Auto Layout is among the most important topics when it comes to iOS development in general. It is extremely important to understand Auto Layout life cycle to save time and avoid naive mistakes. Lack of this information will sooner or later lead to UI glitches and performance issues in your... [Read More]

Reflection and Mirror in Swift

Although Swift is a statically typed language, there is a secret double life to Swift’s type system at runtime that paves the way to some dynamism. This allows to look at the types and the methods that we defined in our code and build higher abstractions on top of that.... [Read More]