No app crash when building QR code

PayForMe.xcodeproj/project.pbxproj

@@ -14,6 +14,7 @@
 		48CC8F7423F5C16D00DCE3D8 /* AddBillView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 48CC8F7323F5C16D00DCE3D8 /* AddBillView.swift */; };
 		48CF709B240FF82000770B97 /* AddMemberView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 48CF709A240FF82000770B97 /* AddMemberView.swift */; };
 		48E7F75B2403FD6B000CE4E6 /* FancyLoadingButton.swift in Sources */ = {isa = PBXBuildFile; fileRef = 48E7F75A2403FD6B000CE4E6 /* FancyLoadingButton.swift */; };
+		62A13D412FA3AB760036EE34 /* ShareProjectQRCodeViewModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 62A13D402FA3AB700036EE34 /* ShareProjectQRCodeViewModel.swift */; };
 		650059FC23DDE1C300D1D599 /* Person.swift in Sources */ = {isa = PBXBuildFile; fileRef = 650059FB23DDE1C300D1D599 /* Person.swift */; };
 		65005A0223DDFB1A00D1D599 /* WhoPaidView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 65005A0123DDFB1A00D1D599 /* WhoPaidView.swift */; };
 		65005A0423DE0C5C00D1D599 /* BillList.swift in Sources */ = {isa = PBXBuildFile; fileRef = 65005A0323DE0C5C00D1D599 /* BillList.swift */; };
@@ -88,6 +89,7 @@
 		48CC8F7323F5C16D00DCE3D8 /* AddBillView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AddBillView.swift; sourceTree = "<group>"; };
 		48CF709A240FF82000770B97 /* AddMemberView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AddMemberView.swift; sourceTree = "<group>"; };
 		48E7F75A2403FD6B000CE4E6 /* FancyLoadingButton.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FancyLoadingButton.swift; sourceTree = "<group>"; };
+		62A13D402FA3AB700036EE34 /* ShareProjectQRCodeViewModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ShareProjectQRCodeViewModel.swift; sourceTree = "<group>"; };
 		650059FB23DDE1C300D1D599 /* Person.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Person.swift; sourceTree = "<group>"; };
 		65005A0123DDFB1A00D1D599 /* WhoPaidView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = WhoPaidView.swift; sourceTree = "<group>"; };
 		65005A0323DE0C5C00D1D599 /* BillList.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BillList.swift; sourceTree = "<group>"; };
@@ -332,6 +334,7 @@
 				489995D923F6EC6F008B7E38 /* OnboardingView.swift */,
 				6523FC56255818F800BCD843 /* Manual */,
 				654754F12528BB7600A82EB6 /* ShareProjectQRCode.swift */,
+				62A13D402FA3AB700036EE34 /* ShareProjectQRCodeViewModel.swift */,
 				6523FC502558153600BCD843 /* AddPasswordView.swift */,
 			);
 			path = Projects;
@@ -571,6 +574,7 @@
 				65662A2423D83ED100303207 /* StorageService.swift in Sources */,
 				655DD2AE2993DACB00E06675 /* ProjectListEntry.swift in Sources */,
 				656E8CB823D9FDA300B3ED10 /* BillListViewModel.swift in Sources */,
+				62A13D412FA3AB760036EE34 /* ShareProjectQRCodeViewModel.swift in Sources */,
 				65C9E2D023E1B96B00814B37 /* BalanceViewModel.swift in Sources */,
 				65662A0723D7320000303207 /* ContentView.swift in Sources */,
 				65005A0223DDFB1A00D1D599 /* WhoPaidView.swift in Sources */,

PayForMe/Views/Projects/ShareProjectQRCode.swift

@@ -5,26 +5,28 @@
 //  Created by Max Tharr on 03.10.20.
 //
 
-import AVFoundation
-import CarBode
 import SwiftUI
 
 struct ShareProjectQRCode: View {
-    let project: Project
 
-    @State var dataString = ""
+    @StateObject private var viewModel: ShareProjectQRCodeViewModel
+
+    init(project: Project) {
+        _viewModel = StateObject(wrappedValue: ShareProjectQRCodeViewModel(project: project))
+    }
 
     var body: some View {
         VStack {
-            Text(dataString).font(.caption)
-            CarBode.CBBarcodeView(data: $dataString, barcodeType: .constant(.qrCode), orientation: .constant(.up), onGenerated: nil)
-                .aspectRatio(contentMode: .fit)
+            Text(viewModel.dataString).font(.caption)
+
+            if let image = viewModel.qrCodeImage {
+                Image(uiImage: image)
+                    .interpolation(.none)
+                    .resizable()
+                    .scaledToFit()
+            }
         }
         .padding()
-        .onAppear {
-            let server = project.url.relativeString.replacingOccurrences(of: "https://", with: "")
-            dataString = "cospend://\(server)/\(project.token.lowercased())/\(project.password)"
-        }
     }
 }
 

PayForMe/Views/Projects/ShareProjectQRCodeViewModel.swift

@@ -0,0 +1,43 @@
+//
+//  ShareProjectQRCodeViewModel.swift
+//  PayForMe
+//
+//  Created by Maximilian Fischer on 30.04.26.
+//  Copyright © 2026 Mayflower GmbH. All rights reserved.
+//
+
+import SwiftUI
+import UIKit
+import CoreImage.CIFilterBuiltins
+
+final class ShareProjectQRCodeViewModel: ObservableObject {
+
+    @Published var qrCodeImage: UIImage?
+    @Published var dataString: String = ""
+
+    private let context = CIContext()
+    private let project: Project
+
+    init(project: Project) {
+        self.project = project
+        generate()
+    }
+
+    private func generate() {
+        let server = project.url.relativeString
+            .replacingOccurrences(of: "https://", with: "")
+        self.dataString = "cospend://\(server)/\(project.token)/\(project.password)"
+        self.qrCodeImage = generateQRCode(from: dataString)
+    }
+
+    private func generateQRCode(from string: String) -> UIImage? {
+        let filter = CIFilter.qrCodeGenerator()
+        filter.message = Data(string.utf8)
+
+        guard let outputImage = filter.outputImage, let cgImage = context.createCGImage(outputImage, from: outputImage.extent) else {
+            return UIImage(systemName: "xmark.circle")
+        }
+
+        return UIImage(cgImage: cgImage)
+    }
+}