Swift Concepts | Architecture Patterns

iOS App Architecture Patterns

Top seven iOS app architecture patterns

Photo by Julian Steenbergen on Unsplash

Let’s learn about the top seven iOS app architecture patterns with examples:

1. Model-View-Controller (MVC):

MVC is the fundamental architecture pattern used in iOS development. It separates the app into three main components: Model (data and business logic), View (user interface), and Controller (mediator between Model and View).

// Model
struct Task {
    var title: String
    var isCompleted: Bool
}

// View
class TaskView: UIView {
    // UI components
}

// Controller
class TaskViewController: UIViewController {
    var tasks = [Task]()
    // Handle user interactions, update the model, and refresh the view
}

2. Model-View-ViewModel (MVVM):

MVVM is an evolution of MVC that focuses on better separation of concerns. It introduces the ViewModel, which handles the presentation logic and data formatting, making it easier to write unit tests for the UI.

// Model
struct Task {
    var title: String
    var isCompleted: Bool
}

// ViewModel
class TaskViewModel {
    var tasks = [Task]()
    // Expose formatted data and handle user interactions
}

//…