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| import Foundation | |
| import AVFoundation | |
| public class QRCodeScanner: NSObject, AVCaptureMetadataOutputObjectsDelegate { | |
| public var callback: ((_ qrCode: String, _ corners: [CGPoint]) -> Void)? | |
| public var captureSession: AVCaptureSession! | |
| public var previewLayer: AVCaptureVideoPreviewLayer! | |
| public func setup(previewView: UIView) -> Bool { | |
| captureSession = AVCaptureSession() | |
| guard let videoCaptureDevice = AVCaptureDevice.default(for: .video) else { return false } | |
| let videoInput: AVCaptureDeviceInput | |
| do { | |
| videoInput = try AVCaptureDeviceInput(device: videoCaptureDevice) | |
| } catch { | |
| return false | |
| } | |
| if captureSession.canAddInput(videoInput) { | |
| captureSession.addInput(videoInput) | |
| } else { | |
| return false | |
| } | |
| let metadataOutput = AVCaptureMetadataOutput() | |
| if captureSession.canAddOutput(metadataOutput) { | |
| captureSession.addOutput(metadataOutput) | |
| metadataOutput.metadataObjectTypes = [.qr] | |
| metadataOutput.setMetadataObjectsDelegate(self, queue: DispatchQueue.main) | |
| } else { | |
| return false | |
| } | |
| previewLayer = AVCaptureVideoPreviewLayer(session: captureSession) | |
| previewLayer.frame = previewView.layer.bounds | |
| previewLayer.videoGravity = .resizeAspectFill | |
| previewView.layer.addSublayer(previewLayer) | |
| captureSession.startRunning() | |
| return true | |
| } | |
| public func stop() { | |
| if captureSession?.isRunning == true { | |
| captureSession.stopRunning() | |
| } | |
| } | |
| public func start() { | |
| if captureSession?.isRunning == false { | |
| captureSession.startRunning() | |
| } | |
| } | |
| public func metadataOutput(_ output: AVCaptureMetadataOutput, didOutput metadataObjects: [AVMetadataObject], from connection: AVCaptureConnection) { | |
| if let metadataObject = metadataObjects.first { | |
| guard let readableObject = metadataObject as? AVMetadataMachineReadableCodeObject else { return } | |
| guard let stringValue = readableObject.stringValue else { return } | |
| callback?(stringValue, readableObject.corners) | |
| } | |
| } | |
| public func updateScannerOrientation() { | |
| if let connection = previewLayer.connection { | |
| let currentDevice: UIDevice = UIDevice.current | |
| let orientation: UIDeviceOrientation = currentDevice.orientation | |
| let previewLayerConnection: AVCaptureConnection = connection | |
| if previewLayerConnection.isVideoOrientationSupported { | |
| switch orientation { | |
| case .portrait: previewLayerConnection.videoOrientation = AVCaptureVideoOrientation.portrait | |
| case .landscapeRight: previewLayerConnection.videoOrientation = AVCaptureVideoOrientation.landscapeLeft | |
| case .landscapeLeft: previewLayerConnection.videoOrientation = AVCaptureVideoOrientation.landscapeRight | |
| case .portraitUpsideDown: previewLayerConnection.videoOrientation = AVCaptureVideoOrientation.portraitUpsideDown | |
| default: previewLayerConnection.videoOrientation = AVCaptureVideoOrientation.portrait | |
| } | |
| } | |
| } | |
| } | |
| } | |
| // | |
| func setupScanner() { | |
| if qrCodeScanner.setup(previewView: previewView) == false { | |
| let ac = UIAlertController(title: NSLocalizedString("scanning_not_supported_title", comment: ""), | |
| message: NSLocalizedString("scanning_not_supported_message", comment: ""), | |
| preferredStyle: .alert) | |
| ac.addAction(UIAlertAction(title: NSLocalizedString("ok", comment: ""), style: .default)) | |
| present(ac, animated: true) | |
| qrCodeScanner.start() | |
| } else { | |
| qrCodeScanner.callback = scannedQRCode | |
| } | |
| } | |
| func scannedQRCode(_ code: String, _ corners: [CGPoint]) { | |
| log.debug("scanned accesstoken") | |
| qrCodeScanner.stop() | |
| AppDelegate.accessToken = code | |
| performSegue(withIdentifier: "goDocumentScan", sender: nil) | |
| } |
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