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