init boilerplate MyApp

MyApp/Assets.xcassets/AccentColor.colorset/Contents.json

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+{
+  "colors" : [
+    {
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

MyApp/Assets.xcassets/AppIcon.appiconset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "tinted"
+        }
+      ],
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

MyApp/Assets.xcassets/Contents.json

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+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

MyApp/ContentView.swift

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+//
+//  ContentView.swift
+//  MyApp
+//
+//  Created by Thomas on 12/3/24.
+//
+
+import SwiftUI
+
+struct ContentView: View {
+    var body: some View {
+        UserListView()
+    }
+}
+
+#Preview {
+    ContentView()
+}

MyApp/Models/User.swift

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+//
+//  User.swift
+//  Boilerplate
+//
+//  Created by Thomas on 12/3/24.
+//
+
+// Models/User.swift
+import Foundation
+
+struct User: Identifiable {
+    let id: UUID
+    let name: String
+    let age: Int
+}

MyApp/MyApp.swift

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+//
+//  MyApp.swift
+//  MyApp
+//
+//  Created by Thomas on 12/3/24.
+//
+
+
+import SwiftUI
+
+@main
+struct MyApp: App {
+    @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
+
+    @Environment(\.scenePhase) var scenePhase
+
+    var body: some Scene {
+        WindowGroup {
+            ContentView()
+        }
+        .onChange(of: scenePhase) { newPhase in
+            switch newPhase {
+            case .active:
+                print("App is active")
+            case .inactive:
+                print("App is inactive")
+            case .background:
+                print("App is in background")
+            @unknown default:
+                break
+            }
+        }
+    }
+}
+
+class AppDelegate: NSObject, UIApplicationDelegate {
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
+        // Notification
+        UNUserNotificationCenter.current().delegate = self
+        return true
+    }
+}
+
+extension AppDelegate: UNUserNotificationCenterDelegate {
+    // Notification
+}

MyApp/Preview Content/Preview Assets.xcassets/Contents.json

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+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

MyApp/Services/UserService.swift

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+//
+//  UserService.swift
+//  Boilerplate
+//
+//  Created by Thomas on 12/3/24.
+//
+
+// Services/UserService.swift
+import Combine
+import Foundation
+
+protocol UserServiceProtocol {
+    func fetchUsers() -> AnyPublisher<[User], Never>
+}
+
+class UserService: UserServiceProtocol {
+    func fetchUsers() -> AnyPublisher<[User], Never> {
+        let users = [
+            User(id: UUID(), name: "Alice", age: 25),
+            User(id: UUID(), name: "Bob", age: 30),
+            User(id: UUID(), name: "Charlie", age: 35)
+        ]
+        return Just(users)
+            .delay(for: .seconds(1), scheduler: DispatchQueue.main) //Mock delay
+            .eraseToAnyPublisher()
+    }
+}

MyApp/ViewModels/UserViewModel.swift

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+//
+//  UserViewModel.swift
+//  Boilerplate
+//
+//  Created by Thomas on 12/3/24.
+//
+
+// ViewModels/UserViewModel.swift
+import Combine
+import Foundation
+
+class UserViewModel: ObservableObject {
+    @Published var users: [User] = []
+    @Published var isLoading: Bool = false
+    private var cancellables = Set<AnyCancellable>()
+    private let userService: UserServiceProtocol
+
+    init(userService: UserServiceProtocol = UserService()) {
+        self.userService = userService
+    }
+
+    func fetchUsers() {
+        isLoading = true
+        userService.fetchUsers()
+            .sink { [weak self] users in
+                self?.users = users
+                self?.isLoading = false
+            }
+            .store(in: &cancellables)
+    }
+}

MyApp/Views/UserDetailView.swift

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+//
+//  UserDetailView.swift
+//  Boilerplate
+//
+//  Created by Thomas on 12/3/24.
+//
+
+// Views/UserDetailView.swift
+import SwiftUI
+
+struct UserDetailView: View {
+    let user: User
+
+    var body: some View {
+        VStack {
+            Text("Name: \(user.name)")
+                .font(.title)
+            Text("Age: \(user.age)")
+                .font(.subheadline)
+        }
+        .padding()
+    }
+}

MyApp/Views/UserListView.swift

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+//
+//  UserListView.swift
+//  Boilerplate
+//
+//  Created by Thomas on 12/3/24.
+//
+
+// Views/UserListView.swift
+import SwiftUI
+
+struct UserListView: View {
+    @StateObject private var viewModel = UserViewModel()
+
+    var body: some View {
+        NavigationView {
+            VStack {
+                if viewModel.isLoading {
+                    ProgressView("Loading...")
+                } else {
+                    List(viewModel.users) { user in
+                        NavigationLink(destination: UserDetailView(user: user)) {
+                            Text(user.name)
+                        }
+                    }
+                }
+            }
+            .navigationBarTitle(Text("Users"), displayMode: .automatic)
+            .onAppear {
+                viewModel.fetchUsers()
+            }
+        }
+    }
+}

MyAppTests/MyAppTests.swift

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+//
+//  MyAppTests.swift
+//  MyAppTests
+//
+//  Created by Thomas on 12/3/24.
+//
+
+import Testing
+@testable import MyApp
+
+struct MyAppTests {
+
+    @Test func example() async throws {
+        // Write your test here and use APIs like `#expect(...)` to check expected conditions.
+    }
+
+}

MyAppUITests/MyAppUITests.swift

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+//
+//  MyAppUITests.swift
+//  MyAppUITests
+//
+//  Created by Thomas on 12/3/24.
+//
+
+import XCTest
+
+final class MyAppUITests: XCTestCase {
+
+    override func setUpWithError() throws {
+        // Put setup code here. This method is called before the invocation of each test method in the class.
+
+        // In UI tests it is usually best to stop immediately when a failure occurs.
+        continueAfterFailure = false
+
+        // In UI tests it’s important to set the initial state - such as interface orientation - required for your tests before they run. The setUp method is a good place to do this.
+    }
+
+    override func tearDownWithError() throws {
+        // Put teardown code here. This method is called after the invocation of each test method in the class.
+    }
+
+    @MainActor
+    func testExample() throws {
+        // UI tests must launch the application that they test.
+        let app = XCUIApplication()
+        app.launch()
+
+        // Use XCTAssert and related functions to verify your tests produce the correct results.
+    }
+
+    @MainActor
+    func testLaunchPerformance() throws {
+        if #available(macOS 10.15, iOS 13.0, tvOS 13.0, watchOS 7.0, *) {
+            // This measures how long it takes to launch your application.
+            measure(metrics: [XCTApplicationLaunchMetric()]) {
+                XCUIApplication().launch()
+            }
+        }
+    }
+}

MyAppUITests/MyAppUITestsLaunchTests.swift

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+//
+//  MyAppUITestsLaunchTests.swift
+//  MyAppUITests
+//
+//  Created by Thomas on 12/3/24.
+//
+
+import XCTest
+
+final class MyAppUITestsLaunchTests: XCTestCase {
+
+    override class var runsForEachTargetApplicationUIConfiguration: Bool {
+        true
+    }
+
+    override func setUpWithError() throws {
+        continueAfterFailure = false
+    }
+
+    @MainActor
+    func testLaunch() throws {
+        let app = XCUIApplication()
+        app.launch()
+
+        // Insert steps here to perform after app launch but before taking a screenshot,
+        // such as logging into a test account or navigating somewhere in the app
+
+        let attachment = XCTAttachment(screenshot: app.screenshot())
+        attachment.name = "Launch Screen"
+        attachment.lifetime = .keepAlways
+        add(attachment)
+    }
+}

README.md

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+# Combine SwiftUI MVVM Dependency Injection 
+
+A boilerplate demonstrates how to use combine and MVVM in the SwiftUI app.
+
+# Structure
+
+ProjectRoot/
+├── Models/
+│   └── User.swift
+├── ViewModels/
+│   └── UserViewModel.swift
+├── Views/
+│   ├── UserListView.swift
+│   └── UserDetailView.swift
+└── Services/
+    └── UserService.swift
+
+# Build Tools & Version
+
+Xcode 15.3 
+
+iOS 15.6+
+
+## Contributing
+
+We appreciate your interest in contributing to 'Combine SwiftUI MVVM Dependency Injection' . Feel free to open issues or submit pull requests.
+
+## License
+
+This project is licensed under the [BSD-4-Clause License](LICENSE).