Scan QR code on Device

This pairing mode only applies to devices that have been connected to the internet.

Initialize IActivator

Parameters

Example

self.pair = ActivatorService.shared.activator(.QRScan)

Example of scanning QR code to get code

Property description

Description

Example

typealias CallBack = (_ code : String? ) -> ()

class QRScanViewController: UIViewController {
    let session = AVCaptureSession()
    var callBack:CallBack?

    override func viewDidLoad() {
        self.addScaningVideo()
    }

    private func addScaningVideo(){
        guard let device = AVCaptureDevice.default(for: .video) else { return }

        guard let deviceInput = try? AVCaptureDeviceInput(device: device) else { return }

        let metadataOutput = AVCaptureMetadataOutput()

        metadataOutput.setMetadataObjectsDelegate(self, queue: DispatchQueue.main)

        if session.canAddInput(deviceInput) {
            session.addInput(deviceInput)
        }
        if session.canAddOutput(metadataOutput) {
            session.addOutput(metadataOutput)
        }

        metadataOutput.metadataObjectTypes = [.qr, .code128, .code39, .code93, .code39Mod43, .ean8, .ean13, .upce, .pdf417, .aztec]

        let previewLayer: AVCaptureVideoPreviewLayer = AVCaptureVideoPreviewLayer(session: session)
        previewLayer.videoGravity = .resizeAspectFill
        previewLayer.frame = view.bounds
        view.layer.insertSublayer(previewLayer, at: 0)

        session.startRunning()
    }
}

extension QRScanViewController: AVCaptureMetadataOutputObjectsDelegate {
    func metadataOutput(_ output: AVCaptureMetadataOutput, didOutput metadataObjects: [AVMetadataObject], from connection: AVCaptureConnection) {
        AudioServicesPlaySystemSound(SystemSoundID(kSystemSoundID_Vibrate))

        session.stopRunning()

        for result in metadataObjects {
            if let code = result as? AVMetadataMachineReadableCodeObject {
                self.callBack?(code.stringValue ?? "")
            }
        }

        self.navigationController?.popViewController(animated: true)
    }
}

Register IActivatorListener to listen for pairing result

Parameters

Callbacks

Example

private func start() {
    pair.listener = self
}

extension ViewController: IActivatorListener {
    func onSuccess(deviceModel: IActivatedDevice?, params: ActivatorParams?) {
        SVProgressHUD.dismiss()
        self.navigationController?.popToRootViewController(animated: true)
    }

    func onError(error: Error, params: ActivatorParams?) {
        SVProgressHUD.dismiss()
        SVProgressHUD.showInfo(withStatus: error.localizedDescription)
    }
}

Start pairing

This method starts device pairing.

Parameters

Example

// Create QRScanActivatorParams instance.
let params = QRScanActivatorParams(code: "code_from_scan_image", assetId: "assetId", longitude: nil, latitude: nil)

// Start pairing. pair is generated during initialization.
// self.pair = ActivatorService.shared.activator(.QRScan)
pair.startPair(params)

Stop pairing

This method stops device pairing.

Example

// Stop pairing. pair is generated during initialization.
// self.pair = ActivatorService.shared.activator(.QRScan)
pair.stopPair()