feat: new globalScore handling

QuizApp/CategorySelectionView.swift

@@ -8,7 +8,7 @@
 import SwiftUI
 
 struct CategorySelectionView: View {
-    @ObservedObject var viewModel = ViewModel()
+    @StateObject private var viewModel = ViewModel()
     @AppStorage("globalScore") var globalScore: Int = 0
     
     var body: some View {

QuizApp/ContentView.swift

@@ -16,6 +16,7 @@ struct ContentView: View {
     
     @State private var selectedAnswerIndex: Int? = nil
     @State private var isAnswered = false
+    @State private var showExitAlert = false
     
     var body: some View {
         VStack {
@@ -45,6 +46,7 @@ struct ContentView: View {
                 }
                 .onAppear {
                     AudioServicesPlaySystemSound(1322)
+                    score += viewModel.score
                 }
             } else if let frage = viewModel.currentQuestion {
                 Text("Punkte: \(viewModel.score)")
@@ -82,9 +84,6 @@ struct ContentView: View {
                         viewModel.incrementScore(selectedIndex: index)
                         viewModel.answeredCount += 1
                         viewModel.selectedAnswers[viewModel.currentQuestionIndex] = index
-                        if index == frage.correctAnswer {
-                            score += 1
-                        }
                     }) {
                         Text(frage.answers[index])
                             .padding(.vertical, 12)
@@ -128,6 +127,26 @@ struct ContentView: View {
                 Text("Fragen werden geladen...")
             }
         }
+        .navigationBarBackButtonHidden(!viewModel.isQuizFinished) // Button verstecken bei aktivem Quiz
+        .toolbar {
+            if !viewModel.isQuizFinished { // Custom Button nur bei aktivem Quiz
+                ToolbarItem(placement: .navigationBarLeading) {
+                    Button("Abbrechen") {
+                        showExitAlert = true
+                    }
+                    .foregroundColor(.red)
+                }
+            }
+        }
+        .alert("Quiz verlassen?", isPresented: $showExitAlert) {
+            Button("Quiz verlassen", role: .destructive) {
+                dismiss()
+            }
+            Button("Weiter spielen", role: .cancel) {
+            }
+        } message: {
+            Text("Deine im Quiz gesammelten Punkte werden nicht gespeichert.")
+        }
     }
     
     private func buttonColor(for index: Int, correctIndex: Int) -> Color {

QuizApp/Topic.swift

@@ -7,8 +7,22 @@
 
 import Foundation
 
-struct QuizQuestion: Decodable, Hashable {
+struct QuizQuestion: Decodable, Hashable, Identifiable {
+    let id: UUID
     let question: String
     let answers: [String]
     let correctAnswer: Int
+    
+    // Manuelles Decoding, id wird generiert
+    init(from decoder: Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        question = try container.decode(String.self, forKey: .question)
+        answers = try container.decode([String].self, forKey: .answers)
+        correctAnswer = try container.decode(Int.self, forKey: .correctAnswer)
+        id = UUID()
+    }
+    
+    private enum CodingKeys: String, CodingKey {
+        case question, answers, correctAnswer
+    }
 }