iOS architectural patterns refer to the various architectural designs and approaches used in iOS application development to ensure scalability, maintainability, and testability. These patterns help organize code and isolate problems, making it easier to manage and extend applications as they grow in complexity. Some of the common iOS architectural patterns are:

1. MVC (Model-View-Controller): This is Apple's traditional design pattern, where the application logic is divided into three parts: Model (data), View. (user). interface) and Controller (intermediary between model and view).
2. MVVM (Model-View-View Model): MVVM separates UI logic from business logic by implementing a ViewModel layer that exposes data and commands for View binding, improving testability and reusability.
3. MVP (Model-View-Presenter): MVP separates problems by dividing the application into three layers: Model (data), View (interface) and Presenter (agent that interacts with both the models). and the sight).
4.  VIPER (View-Interactor-Presenter-Entity-Routing): VIPER is a more modular and scalable architecture that divides responsibility in five levels: View (UI), Interactor (business logic), Presenter ( UI logic), entity (data model) and routing (navigation).
5. Clean Architecture: Inspired by the principles of Robert C. Martin, Clean Architecture emphasizes separation of concerns and dependency inversion, ensuring that business rules and logic are independent of user interfaces and frameworks.
6. Redux: Originally from web development, Redux is used in iOS with libraries like ReSwift or Combine to manage application state in a predictable and centralized way.                                                                                                                                                                                                                                                                                                                    Each architecture model has its own strengths and suitability for different applications and team dynamics. Choosing the right architectural model can have a significant impact on the scalability, maintainability and testability of iOS applications throughout their lifecycle.