OCR does not work

Hi,

I'm working with a very simple app that tries to read a coordinates card and past the data into diferent fields. The card's layout is COLUMNS from 1-10, ROWs from A-J and a two digit number for each cell. In my app, I have field for each of those cells (A1, A2...). I want that OCR to read that card and paste the info but I just cant. I have two problems. The camera won't close. It remains open until I press the button SAVE (this is not good because a user could take 3, 4, 5... pictures of the same card with, maybe, different results, and then? Which is the good one?). Then, after I press save, I can see the OCR kinda works ( the console prints all the date read) but the info is not pasted at all. Any idea? I know is hard to know what's wrong but I've tried chatgpt and all it does... just doesn't work

This is the code from the scanview

import SwiftUI import Vision import VisionKit

struct ScanCardView: UIViewControllerRepresentable { @Binding var scannedCoordinates: [String: String] var useLettersForColumns: Bool var numberOfColumns: Int var numberOfRows: Int @Environment(.presentationMode) var presentationMode

func makeUIViewController(context: Context) -> VNDocumentCameraViewController {
    let scannerVC = VNDocumentCameraViewController()
    scannerVC.delegate = context.coordinator
    return scannerVC
}

func updateUIViewController(_ uiViewController: VNDocumentCameraViewController, context: Context) {}

func makeCoordinator() -> Coordinator {
    return Coordinator(self)
}

class Coordinator: NSObject, VNDocumentCameraViewControllerDelegate {
    let parent: ScanCardView

    init(_ parent: ScanCardView) {
        self.parent = parent
    }

    func documentCameraViewController(_ controller: VNDocumentCameraViewController, didFinishWith scan: VNDocumentCameraScan) {
        print("Escaneo completado, procesando imagen...")
        guard scan.pageCount > 0, let image = scan.imageOfPage(at: 0).cgImage else {
            print("No se pudo obtener la imagen del escaneo.")
            controller.dismiss(animated: true, completion: nil)
            return
        }

        recognizeText(from: image)
        DispatchQueue.main.async {
            print("Finalizando proceso OCR y cerrando la cámara.")
            controller.dismiss(animated: true, completion: nil)
        }
    }

    func documentCameraViewControllerDidCancel(_ controller: VNDocumentCameraViewController) {
        print("Escaneo cancelado por el usuario.")
        controller.dismiss(animated: true, completion: nil)
    }

    func documentCameraViewController(_ controller: VNDocumentCameraViewController, didFailWithError error: Error) {
        print("Error en el escaneo: \(error.localizedDescription)")
        controller.dismiss(animated: true, completion: nil)
    }

    private func recognizeText(from image: CGImage) {
        let request = VNRecognizeTextRequest { (request, error) in
            guard let observations = request.results as? [VNRecognizedTextObservation], error == nil else {
                print("Error en el reconocimiento de texto: \(String(describing: error?.localizedDescription))")
                DispatchQueue.main.async {
                    self.parent.presentationMode.wrappedValue.dismiss()
                }
                return
            }

            let recognizedStrings = observations.compactMap { observation in
                observation.topCandidates(1).first?.string
            }

            print("Texto reconocido: \(recognizedStrings)")

            let filteredCoordinates = self.filterValidCoordinates(from: recognizedStrings)

            DispatchQueue.main.async {
                print("Coordenadas detectadas después de filtrar: \(filteredCoordinates)")
                self.parent.scannedCoordinates = filteredCoordinates
            }
        }

        request.recognitionLevel = .accurate
        let handler = VNImageRequestHandler(cgImage: image, options: [:])

        DispatchQueue.global(qos: .userInitiated).async {
            do {
                try handler.perform([request])
                print("OCR completado y datos procesados.")
            } catch {
                print("Error al realizar la solicitud de OCR: \(error.localizedDescription)")
            }
        }
    }

    private func filterValidCoordinates(from strings: [String]) -> [String: String] {
        var result: [String: String] = [:]

        print("Texto antes de filtrar: \(strings)")

        for string in strings {
            let trimmedString = string.replacingOccurrences(of: " ", with: "")

            if parent.useLettersForColumns {
                let pattern = "^[A-J]\\d{1,2}$"  // Letras de A-J seguidas de 1 o 2 dígitos
                if trimmedString.range(of: pattern, options: .regularExpression) != nil {
                    print("Coordenada válida detectada (letras): \(trimmedString)")
                    result[trimmedString] = "Valor"  // Asignación de prueba
                }
            } else {
                let pattern = "^[1-9]\\d{0,1}$"  // Solo números, de 1 a 99
                if trimmedString.range(of: pattern, options: .regularExpression) != nil {
                    print("Coordenada válida detectada (números): \(trimmedString)")
                    result[trimmedString] = "Valor"
                }
            }
        }

        print("Coordenadas finales después de filtrar: \(result)")
        return result
    }
}

}