[Feat] #243 - FourthOnboardingView MVVM + Combine 적용

Author: yungu0010

iOS-NOTTODO/iOS-NOTTODO/Coordinator/Factory/ViewControllerFactory.swift

@@ -84,7 +84,8 @@ extension ViewControllerFactoryImpl {
         return viewController
     }
     func makeFourthOnboardingViewController(coordinator: AuthCoordinator) -> FourthOnboardingViewController {
-        let viewController = FourthOnboardingViewController(coordinator: coordinator)
+        let viewModel = FourthOnboardingViewModelImpl(coordinator: coordinator)
+        let viewController = FourthOnboardingViewController(viewModel: viewModel)
         return viewController
     }
     func makeFifthOnboardingViewController(coordinator: AuthCoordinator) -> FifthOnboardingViewController {

iOS-NOTTODO/iOS-NOTTODO/Presentation/Onboarding/ViewControllers/FourthOnboardingViewController.swift

@@ -7,6 +7,7 @@
 
 import UIKit
 
+import Combine
 import SnapKit
 import Then
 
@@ -20,7 +21,11 @@ final class FourthOnboardingViewController: UIViewController {
     private let onboardingModel: [FourthOnboardingModel] = FourthOnboardingModel.items
     private var dataSource: UICollectionViewDiffableDataSource<Section, FourthOnboardingModel>! = nil
     private lazy var safeArea = self.view.safeAreaLayoutGuide
-    private weak var coordinator: AuthCoordinator?
+    
+    private let viewModel: any FourthOnboardingViewModel
+    private var cancelBag = Set<AnyCancellable>()
+    
+    private let buttonDidTapped = PassthroughSubject<Void, Never>()
 
     // MARK: - UI Components
 
@@ -30,8 +35,8 @@ final class FourthOnboardingViewController: UIViewController {
 
     // MARK: - init
 
-    init(coordinator: AuthCoordinator) {
-        self.coordinator = coordinator
+    init(viewModel: some FourthOnboardingViewModel) {
+        self.viewModel = viewModel
         super.init(nibName: nil, bundle: nil)
     }
 
@@ -49,6 +54,7 @@ final class FourthOnboardingViewController: UIViewController {
         setLayout()
         setupDataSource()
         reloadData()
+        setBindings()
     }
 }
 
@@ -59,6 +65,7 @@ extension FourthOnboardingViewController {
         collectionView.register(SubOnboardingCollectionViewCell.self, forCellWithReuseIdentifier: SubOnboardingCollectionViewCell.identifier)
         collectionView.register(OnboardingHeaderView.self, forSupplementaryViewOfKind: UICollectionView.elementKindSectionHeader, withReuseIdentifier: OnboardingHeaderView.identifier)
     }
+    
     private func setUI() {
         view.backgroundColor = .ntdBlack
 
@@ -67,6 +74,7 @@ extension FourthOnboardingViewController {
             $0.bounces = false
             $0.isScrollEnabled = false
         }
+        
         nextButton.do {
             $0.configuration?.image = .splashBack
             $0.configuration?.title = I18N.fourthButton
@@ -137,12 +145,19 @@ extension FourthOnboardingViewController {
         let layout = UICollectionViewCompositionalLayout(section: section)
         return layout
     }
+    
+    private func setBindings() {
+        let input = FourthOnboardingViewModelInput(
+            buttonDidTapped: buttonDidTapped
+        )
+        _ = viewModel.transform(input: input)
+    }
 }
 extension FourthOnboardingViewController {
     @objc
     private func buttonTapped() {
         AmplitudeAnalyticsService.shared.send(event: AnalyticsEvent.OnboardingClick.clickOnboardingNext4)
 
-        self.coordinator?.showFifthOnboardingViewController()
+        self.buttonDidTapped.send()
     }
 }

iOS-NOTTODO/iOS-NOTTODO/Presentation/Onboarding/ViewModel/FourthOnboardingViewModel.swift

@@ -5,4 +5,12 @@
 //  Created by 강윤서 on 3/14/24.
 //
 
-import Foundation
+import Combine
+
+protocol FourthOnboardingViewModel: ViewModel where Input == FourthOnboardingViewModelInput, Output == FourthOnboardingViewModelOutput {}
+
+struct FourthOnboardingViewModelInput {
+    let buttonDidTapped: PassthroughSubject<Void, Never>
+}
+
+struct FourthOnboardingViewModelOutput {}

iOS-NOTTODO/iOS-NOTTODO/Presentation/Onboarding/ViewModel/FourthOnboardingViewModelImpl.swift

@@ -5,4 +5,24 @@
 //  Created by 강윤서 on 3/14/24.
 //
 
-import Foundation
+import Combine
+
+final class FourthOnboardingViewModelImpl: FourthOnboardingViewModel {
+    
+    private weak var coordinator: AuthCoordinator?
+    private var cancelBag = Set<AnyCancellable>()
+    
+    init(coordinator: AuthCoordinator) {
+        self.coordinator = coordinator
+    }
+    
+    func transform(input: FourthOnboardingViewModelInput) -> FourthOnboardingViewModelOutput {
+        input.buttonDidTapped
+            .sink { [weak self] _ in
+                guard let self else { return }
+                self.coordinator?.showFifthOnboardingViewController()
+            }
+            .store(in: &cancelBag)
+        return FourthOnboardingViewModelOutput()
+    }
+}