Can you list standard design patterns used in Swift?

In Swift, common design patterns include:

• Singleton — for creating a single instance of a class accessible globally.
• Delegate — for passing events and data between objects, often used in UIKit.
• Observer — for subscribing to changes in object states (e.g., via NotificationCenter).
• Factory — for creating objects without specifying the exact class.
• MVC (Model-View-Controller) — a widely used architectural pattern in iOS development.
• Builder — for step-by-step creation of complex objects.

These patterns help organize code, improve maintainability, and extendability.