feat: added "Nächste Frage" button

QuizApp/ContentView.swift

@@ -16,7 +16,7 @@ struct ContentView: View {
 
     var body: some View {
         VStack {
-            if let frage = viewModel.topics.first {
+            if let frage = viewModel.currentQuestion {
                 Text(frage.question)
                     .font(.title)
                     .multilineTextAlignment(.center)
@@ -46,9 +46,18 @@ struct ContentView: View {
                             .padding()
                     }
                     if isAnswered {
-                        Button("Nächste Frage") {
+                        Button(action: {
+                            viewModel.loadNextQuestion()
                             selectedAnswerIndex = nil
                             isAnswered = false
+                        }) {
+                            Text("Nächste Frage")
+                                .font(.headline)
+                                .padding(.vertical, 10)
+                                .padding(.horizontal, 30)
+                                .background(Color.blue)
+                                .foregroundColor(.white)
+                                .cornerRadius(10)
                         }
                     }
                 }

QuizApp/Topic.swift

@@ -7,7 +7,7 @@
 
 import Foundation
 
-struct Topic: Decodable, Hashable {
+struct QuizQuestion: Decodable, Hashable {
     
     let question: String
     let answers: [String]

QuizApp/ViewModel.swift

@@ -9,22 +9,34 @@ import Foundation
 
 class ViewModel: ObservableObject {
     
-    let topics: [Topic]
-    
+    @Published var questions: [QuizQuestion] = []
     @Published var currentQuestionIndex: Int = 0
     
+    var currentQuestion: QuizQuestion? {
+            guard currentQuestionIndex < questions.count else { return nil }
+            return questions[currentQuestionIndex]
+        }
+    
     init() {
         guard let url = Bundle.main.url(forResource: "data", withExtension: "json") else {
-            topics = []
+            questions = []
             return
         }
         
         do {
             let data = try Data(contentsOf: url)
-            topics = try JSONDecoder().decode([Topic].self, from: data)
+            questions = try JSONDecoder().decode([QuizQuestion].self, from: data)
         } catch {
             print("Fehler beim Laden des Inhalts: \(error)")
-            topics = []
+            questions = []
+        }
+    }
+    
+    func loadNextQuestion() {
+        if currentQuestionIndex + 1 < questions.count {
+            currentQuestionIndex += 1
+        } else {
+            currentQuestionIndex = 0 // oder Quiz-Ende behandeln
         }
     }
 }

QuizApp/data.json

@@ -6,7 +6,47 @@
     },
     {
         "question": "Was ist die Hauptstadt von Deutschland?",
-        "answers": ["Rom", "Berlin", "Paris"],
+        "answers": ["Berlin", "Wien", "Hamburg"],
+        "correctAnswer": 0
+    },
+    {
+        "question": "Was ist die Hauptstadt von Italien?",
+        "answers": ["Rom", "Mailand", "Neapel"],
+        "correctAnswer": 0
+    },
+    {
+        "question": "Was ist die Hauptstadt von Spanien?",
+        "answers": ["Barcelona", "Madrid", "Valencia"],
         "correctAnswer": 1
+    },
+    {
+        "question": "Was ist die Hauptstadt von Österreich?",
+        "answers": ["Graz", "Salzburg", "Wien"],
+        "correctAnswer": 2
+    },
+    {
+        "question": "Was ist die Hauptstadt der Schweiz?",
+        "answers": ["Zürich", "Bern", "Genf"],
+        "correctAnswer": 1
+    },
+    {
+        "question": "Was ist die Hauptstadt von Portugal?",
+        "answers": ["Lissabon", "Porto", "Faro"],
+        "correctAnswer": 0
+    },
+    {
+        "question": "Was ist die Hauptstadt von Belgien?",
+        "answers": ["Brüssel", "Antwerpen", "Brügge"],
+        "correctAnswer": 0
+    },
+    {
+        "question": "Was ist die Hauptstadt von Niederlande?",
+        "answers": ["Rotterdam", "Amsterdam", "Den Haag"],
+        "correctAnswer": 1
+    },
+    {
+        "question": "Was ist die Hauptstadt von Polen?",
+        "answers": ["Warschau", "Krakau", "Danzig"],
+        "correctAnswer": 0
     }
 ]