fix: move vars to ViewModel

QuizApp/ViewModels/CategorySelectionViewModel.swift

@@ -0,0 +1,7 @@
+//
+//  CategorySelectionViewModel..swift
+//  QuizApp
+//
+//  Created by Paul Nowotka on 23.08.25.
+//
+

QuizApp/ViewModels/ViewModel.swift

@@ -17,6 +17,13 @@ class ViewModel: ObservableObject {
     @Published var isQuizFinished: Bool = false
     @Published var answeredCount: Int = 0
     @Published var selectedAnswers: [Int?] = []
+    @Published var isAnswered = false
+    @Published var selectedAnswerIndex: Int? = nil
+    @Published var showExitAlert = false
+    @Published var isNewHighscore = false
+    @Published var estimationValue: Double = 0
+    @Published var estimationSubmitted: Bool = false
+    @Published var estimationPoints: Int = 0
     
     
     var progress: Double {

QuizApp/Views/QuizView.swift

@@ -16,22 +16,13 @@ struct QuizView: View {
     
     let category: String
     
-    @State private var selectedAnswerIndex: Int? = nil
-    @State private var isAnswered = false
-    @State private var showExitAlert = false
-    @State private var isNewHighscore = false
-    
-    @State private var estimationValue: Double = 0
-    @State private var estimationSubmitted: Bool = false
-    @State private var estimationPoints: Int = 0
-    
     var body: some View {
         VStack {
             if viewModel.isQuizFinished {
                 QuizFinishedView(
                     score: viewModel.score,
                     total: viewModel.questions.count,
-                    isNewHighscore: isNewHighscore,
+                    isNewHighscore: viewModel.isNewHighscore,
                     onPlayAgain: { restartQuiz() },
                     onBackToCategories: { dismiss() }
                 )
@@ -39,7 +30,7 @@ struct QuizView: View {
                     AudioServicesPlaySystemSound(1322)
                     score += viewModel.score
                     // Highscore prüfen/setzen
-                    isNewHighscore = viewModel.updateHighscoreIfNeeded()
+                    viewModel.isNewHighscore = viewModel.updateHighscoreIfNeeded()
                 }
                 .onDisappear {
                     viewModel.isQuizFinished = false
@@ -70,23 +61,23 @@ struct QuizView: View {
                         correctValue: correctV,
                         unit: frage.unit ?? "",
                         viewModel: viewModel,
-                        value: $estimationValue,
-                        submitted: $estimationSubmitted,
-                        gainedPoints: $estimationPoints
+                        value: $viewModel.estimationValue,
+                        submitted: $viewModel.estimationSubmitted,
+                        gainedPoints: $viewModel.estimationPoints
                     ) { gained in
                         viewModel.score += gained
                         viewModel.answeredCount += 1
                         viewModel.selectedAnswers[viewModel.currentQuestionIndex] = 0
-                        isAnswered = true
+                        viewModel.isAnswered = true
                     }
                     
-                    if estimationSubmitted {
+                    if viewModel.estimationSubmitted {
                         Button {
                             viewModel.loadNextQuestion()
-                            estimationSubmitted = false
-                            isAnswered = false
-                            selectedAnswerIndex = nil
-                            estimationPoints = 0
+                            viewModel.estimationSubmitted = false
+                            viewModel.isAnswered = false
+                            viewModel.selectedAnswerIndex = nil
+                            viewModel.estimationPoints = 0
                         } label: {
                             Text("Nächste Frage")
                                 .font(.headline)
@@ -104,8 +95,8 @@ struct QuizView: View {
                     MultipleChoiceQuestionView(
                         answers: frage.answers,
                         correctIndex: frage.correctAnswer,
-                        selectedIndex: $selectedAnswerIndex,
-                        isAnswered: $isAnswered,
+                        selectedIndex: $viewModel.selectedAnswerIndex,
+                        isAnswered: $viewModel.isAnswered,
                         onAnswer: { index in
                             print("Selected:", index)
                             print("Correct:", frage.correctAnswer)
@@ -118,8 +109,8 @@ struct QuizView: View {
                         },
                         onNext: {
                             viewModel.loadNextQuestion()
-                            selectedAnswerIndex = nil
-                            isAnswered = false
+                            viewModel.selectedAnswerIndex = nil
+                            viewModel.isAnswered = false
                         }
                     )
                 }
@@ -135,13 +126,13 @@ struct QuizView: View {
             if !viewModel.isQuizFinished {
                 ToolbarItem(placement: .navigationBarLeading) {
                     Button("Abbrechen") {
-                        showExitAlert = true
+                        viewModel.showExitAlert = true
                     }
                     .foregroundColor(.red)
                 }
             }
         }
-        .alert("Quiz verlassen?", isPresented: $showExitAlert) {
+        .alert("Quiz verlassen?", isPresented: $viewModel.showExitAlert) {
             Button("Quiz verlassen", role: .destructive) {
                 dismiss()
             }
@@ -153,11 +144,11 @@ struct QuizView: View {
     }
     
     private func buttonColor(for index: Int, correctIndex: Int) -> Color {
-        guard isAnswered else { return .blue }
+        guard viewModel.isAnswered else { return .blue }
         
         if index == correctIndex {
             return .green
-        } else if index == selectedAnswerIndex {
+        } else if index == viewModel.selectedAnswerIndex {
             return .red
         } else {
             return .gray
@@ -168,8 +159,8 @@ struct QuizView: View {
         viewModel.currentQuestionIndex = 0
         viewModel.score = 0
         viewModel.isQuizFinished = false
-        selectedAnswerIndex = nil
-        isAnswered = false
+        viewModel.selectedAnswerIndex = nil
+        viewModel.isAnswered = false
         viewModel.answeredCount = 0
         viewModel.selectedAnswers = Array(repeating: nil, count: viewModel.questions.count)
     }