What are architecture patterns for SwiftUI in Swift?

SwiftUI, Apple's modern UI framework for building user interfaces across all Apple platforms, supports various architecture patterns that help organize code more efficiently. Here are some key architecture patterns used in SwiftUI:

Model-View-ViewModel (MVVM)

MVVM is one of the most popular architecture patterns in SwiftUI. In this pattern, the model represents the data, the view displays the interface, and the ViewModel interacts with the model and provides data to the view.

Example:


        struct ContentView: View {
            @StateObject var viewModel = MyViewModel()

            var body: some View {
                List(viewModel.items) { item in
                    Text(item.name)
                }
                .onAppear {
                    viewModel.fetchItems()
                }
            }
        }

        class MyViewModel: ObservableObject {
            @Published var items: [Item] = []

            func fetchItems() {
                // Fetch data from a source
            }
        }

Reducer Pattern

Inspired by Redux, the reducer pattern involves a central store and emphasizes state management through actions and reducers. This pattern is useful for complex state management.

Example:


        struct AppState {
            var count: Int = 0
        }

        enum Action {
            case increment
            case decrement
        }

        func reducer(state: inout AppState, action: Action) {
            switch action {
            case .increment:
                state.count += 1
            case .decrement:
                state.count -= 1
            }
        }

        struct ContentView: View {
            @State private var state = AppState()

            var body: some View {
                VStack {
                    Text("Count: \(state.count)")
                    Button("Increment") {
                        reducer(state: &state, action: .increment)
                    }
                    Button("Decrement") {
                        reducer(state: &state, action: .decrement)
                    }
                }
            }
        }

Combine with SwiftUI

Using Combine alongside SwiftUI can enhance reactive programming. You can create publishers and subscribers for more responsive UI updates based on asynchronous data streams.

Example:


        class DataLoader: ObservableObject {
            @Published var data: [String] = []

            func loadData() {
                Just(["Item 1", "Item 2", "Item 3"])
                    .delay(for: .seconds(2), scheduler: RunLoop.main)
                    .assign(to: &$data)
            }
        }

        struct ContentView: View {
            @StateObject var loader = DataLoader()

            var body: some View {
                List(loader.data, id: \.self) { item in
                    Text(item)
                }
                .onAppear {
                    loader.loadData()
                }
            }
        }

What are architecture patterns for SwiftUI in Swift?

Model-View-ViewModel (MVVM)

Example:

Reducer Pattern

Example:

Combine with SwiftUI

Example:

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What are architecture patterns for SwiftUI in Swift?

Model-View-ViewModel (MVVM)

Example:

Reducer Pattern

Example:

Combine with SwiftUI

Example:

Related Questions

Popular Topics

Recent Languages