> For the complete documentation index, see [llms.txt](https://docs.1kosmos.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.1kosmos.com/mobile-sdk/native/ios/api-reference/classes/qrscannerhelper.md).

# QRScannerHelper

**public class** QRScannerHelper

* This helper class provides QR scanning functionality.

### Constructor

public init(bidScannerView: BIDScannerView, kQRScanResponseDelegate: QRScanResponseDelegate)

* Creates an object of QRScannerHelper.

| Parameters              |                            |                                                      |
| ----------------------- | -------------------------- | ---------------------------------------------------- |
| bidScannerView          | **BIDScannerView**         | An object of BIDScannerView.                         |
| kQRScanResponseDelegate | **QRScanResponseDelegate** | The block to execute after the response is received. |

### Method Summary

| Parameters |                   |                                                |
| ---------- | ----------------- | ---------------------------------------------- |
| **Bool**   | isRunning()       | Indicates if the QR scanner is running or not. |
| **void**   | startQRScanning() | Starts the QR scanner.                         |
| **void**   | stopQRScanning()  | Stops the QR scanner.                          |

### Method Detail

#### isRunning

**public** func isRunning() -> **Bool**

* Indicates whether the QR scanner is running.

***

#### startQRScanning

**public** func startQRScanning()

* Starts the QR scanner.

***

#### stopQRScanning

**public** func stopQRScanning()

* Stops the QR scanner.

***

### Protocol Summary

| Protocal               | Description                                           |
| ---------------------- | ----------------------------------------------------- |
| QRScanResponseDelegate | Callback for the event when QR scanning is completed. |

#### QRScanResponseDelegate

**public protocol** QRScanResponseDelegate: **AnyObject**

* Callback for when QR scanning is complete.

**Method Summary**

func onQRScanResult(qrCodeData: String?)

* Called when QR scanning is completed.

| Parameter  | Type       | Description                                               |
| ---------- | ---------- | --------------------------------------------------------- |
| qrCodeData | **String** | Returns the QR code data after the scanning is completed. |


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