first commit

ios/Runner/SceneDelegate.swift

@@ -0,0 +1,57 @@
+import Flutter
+import UIKit
+import Vision
+
+class SceneDelegate: FlutterSceneDelegate {
+
+  override func scene(
+    _ scene: UIScene,
+    willConnectTo session: UISceneSession,
+    options connectionOptions: UIScene.ConnectionOptions
+  ) {
+    super.scene(scene, willConnectTo: session, options: connectionOptions)
+
+    guard let controller = window?.rootViewController as? FlutterViewController else { return }
+
+    let channel = FlutterMethodChannel(
+      name: "com.rapollo/qr_scanner",
+      binaryMessenger: controller.binaryMessenger
+    )
+
+    channel.setMethodCallHandler { (call, result) in
+      guard call.method == "decodeQRFromBytes" else {
+        result(FlutterMethodNotImplemented)
+        return
+      }
+
+      guard
+        let args = call.arguments as? FlutterStandardTypedData,
+        let image = UIImage(data: args.data),
+        let cgImage = image.cgImage
+      else {
+        result(nil)
+        return
+      }
+
+      let request = VNDetectBarcodesRequest { (request, error) in
+        if error != nil {
+          result(nil)
+          return
+        }
+        let payload = (request.results as? [VNBarcodeObservation])?
+          .first { $0.symbology == .qr }?
+          .payloadStringValue
+        result(payload)
+      }
+
+      let handler = VNImageRequestHandler(cgImage: cgImage, options: [:])
+      DispatchQueue.global(qos: .userInitiated).async {
+        do {
+          try handler.perform([request])
+        } catch {
+          result(nil)
+        }
+      }
+    }
+  }
+}