I built unmodified “Scanner” sample code from 0.81 sdk for “iPad Air 2”, it crashes with error
2019-01-03 15:04:57.438307-0800 Scanner[546:26330] *** Terminating app due to uncaught exception ‘AVCameraCalibration’, reason: 'We want to use AV Intrinsics, but we’re not getting them! Make sure that you have set
conn.cameraIntrinsicsMatrixDeliveryEnabled = YES on the AVCaptureConnection object (before you commit the AVCaptureSession configuration).'
conn.cameraIntrinsicMatrixDeliveryEnabled = YES is not stepped in, maybe isCameraIntrinsicMatrixDeliverySupported is not supported for iPad Air 2.
but the scanner app downloaded from App Store works okay.
I built the Scanner sample code with Xcode 10 under Mojave, the built app works also in iPad Pro 9.7