What are architecture patterns for Core Bluetooth in Swift?

When developing applications using Core Bluetooth in Swift, it's essential to consider architecture patterns that facilitate clean code, scalability, and maintainability. Here are some common architecture patterns to consider:

1. MVC (Model-View-Controller)

The MVC pattern is a traditional design pattern where the model represents the data, the view displays the data, and the controller handles the logic. In a Core Bluetooth application, the central manager would act as the controller.

2. MVVM (Model-View-ViewModel)

MVVM promotes a clear separation of the UI and business logic. You can create a ViewModel that interacts with the Core Bluetooth API, allowing for a more testable and manageable codebase.

3. VIPER (View, Interactor, Presenter, Entity, and Router)

VIPER is a more modular approach that divides responsibilities across several components. Each component has a specific role, making this pattern suitable for larger, more complex applications utilizing Core Bluetooth.

4. Coordinator Pattern

This pattern manages navigation and the flow of the application. In a Core Bluetooth app, coordinators can oversee the setup of Bluetooth sessions and the transitions between screens related to Bluetooth functionalities.

Example: Using MVVM with Core Bluetooth

    import UIKit
    import CoreBluetooth

    // ViewModel
    class BluetoothViewModel: NSObject, CBCentralManagerDelegate {
        var centralManager: CBCentralManager!

        override init() {
            super.init()
            self.centralManager = CBCentralManager(delegate: self, queue: nil)
        }

        func centralManagerDidUpdateState(_ central: CBCentralManager) {
            if central.state == .poweredOn {
                print("Bluetooth is powered on")
            } else {
                print("Bluetooth is not available")
            }
        }
    }

    // View
    class BluetoothViewController: UIViewController {
        var viewModel: BluetoothViewModel!

        override func viewDidLoad() {
            super.viewDidLoad()
            self.viewModel = BluetoothViewModel()
        }
    }