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# IKScannerDeviceViewTransferMode

These constants determine how the scanner data is returned to the delegate. They are used by the [`transferMode`](/documentation/Quartz/IKScannerDeviceView/transferMode) property.

```
@frozen enum IKScannerDeviceViewTransferMode
```

## Topics

### Constants

[`IKScannerDeviceViewTransferMode.fileBased`](/documentation/Quartz/IKScannerDeviceViewTransferMode/fileBased)

The scanned content will be saved to the specified download directory.

[`IKScannerDeviceViewTransferMode.memoryBased`](/documentation/Quartz/IKScannerDeviceViewTransferMode/memoryBased)

The scanned data is returned to the delegate as a `NSData` object.


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