AVCaptureDevicePosition

AVCaptureDevicePosition enumeration specifies the position of a capture device.

const AVCaptureDevicePosition = {
    Front: 0,
    Back: 1,
    Unspecified: 2,
}

Constant	Description
Unspecified	the capture device is on the front of the unit
Back	the capture device is on the back of the unit
Front	the capture device’s position relative to the system hardware is unspecified

Info

For more information, please see the official Apple documentation.