Start Document Detection

To get the result, you must implement the DocumentDetectorControllerDelegate delegate in your controller:

class YouController: UIViewController, DocumentDetectorControllerDelegate{
    
    // MARK: - Document Detection Delegates
    
    func documentDetectionController(_ scanner: DocumentDetectorController, didFinishWithResults results: DocumentDetectorResult) {
        //Called when the process was successfully executed
        //The result variable contains the data obtained
    }
    
    func documentDetectionControllerDidCancel(_ scanner: DocumentDetectorController) {
        // Called when the user cancel
    }
    
    func documentDetectionController(_ scanner: DocumentDetectorController, didFailWithError error: DocumentDetectorFailure) {
        //Called when the process terminate with an error
        //The error variable contains info about error
    }
}

After creating the DocumentDetector object, start the DocumentDetectorController by passing this object as a parameter in the constructor:

let scannerVC = DocumentDetectorController(documentDetector: documentDetector)
scannerVC.documentDetectorDelegate = self
present(scannerVC, animated: true, completion: nil)