Initalier Commit

Linkster/QRScannerView.swift

@@ -0,0 +1,62 @@
+import SwiftUI
+import AVFoundation
+
+struct QRScannerView: UIViewControllerRepresentable {
+    let onScan: (String) -> Void
+
+    func makeUIViewController(context: Context) -> ScannerViewController {
+        let vc = ScannerViewController()
+        vc.onScan = onScan
+        return vc
+    }
+
+    func updateUIViewController(_ uiViewController: ScannerViewController, context: Context) {}
+}
+
+final class ScannerViewController: UIViewController, AVCaptureMetadataOutputObjectsDelegate {
+    var onScan: ((String) -> Void)?
+
+    private let session = AVCaptureSession()
+    private var previewLayer: AVCaptureVideoPreviewLayer?
+
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        view.backgroundColor = .black
+        setupCapture()
+    }
+
+    override func viewDidLayoutSubviews() {
+        super.viewDidLayoutSubviews()
+        previewLayer?.frame = view.bounds
+    }
+
+    private func setupCapture() {
+        guard let device = AVCaptureDevice.default(for: .video),
+              let input = try? AVCaptureDeviceInput(device: device),
+              session.canAddInput(input) else { return }
+
+        session.addInput(input)
+
+        let output = AVCaptureMetadataOutput()
+        guard session.canAddOutput(output) else { return }
+        session.addOutput(output)
+        output.setMetadataObjectsDelegate(self, queue: .main)
+        output.metadataObjectTypes = [.qr]
+
+        let layer = AVCaptureVideoPreviewLayer(session: session)
+        layer.videoGravity = .resizeAspectFill
+        view.layer.addSublayer(layer)
+        previewLayer = layer
+
+        DispatchQueue.global(qos: .userInitiated).async { self.session.startRunning() }
+    }
+
+    func metadataOutput(_ output: AVCaptureMetadataOutput,
+                        didOutput objects: [AVMetadataObject],
+                        from connection: AVCaptureConnection) {
+        guard let obj = objects.first as? AVMetadataMachineReadableCodeObject,
+              let value = obj.stringValue else { return }
+        session.stopRunning()
+        onScan?(value)
+    }
+}