Can the VIPER architectural pattern be used in development with SwiftUI?

Yes, the VIPER architectural pattern can be used in SwiftUI development, although it was originally designed for UIKit. VIPER helps separate responsibilities among components (View, Interactor, Presenter, Entity, Router), which promotes maintainability and testability of the code.

In SwiftUI, the View is declarative and managed by state, so integrating VIPER requires adaptation, for example, the Presenter can act as an ObservableObject, and the View subscribes to its changes. The Router handles navigation, and the Interactor is responsible for business logic.

An example of a simplified Presenter structure for SwiftUI:

class Presenter: ObservableObject {
    @Published var data: String = ""

    func fetchData() {
        // business logic
        data = "Hello from VIPER"
    }
}

struct ContentView: View {
    @StateObject var presenter = Presenter()

    var body: some View {
        Text(presenter.data)
            .onAppear {
                presenter.fetchData()
            }
    }
}

Thus, VIPER can be applied in SwiftUI, but taking into account the features of declarative UI and reactive approach.