IKScannerDeviceView always uses a file based transfer mode

Question

I'm making a Mac application to scan multiple page pdf documents.

I'm using an IKScannerDeviceView and I set it's transferMode property to memory based so in the delegate I can get the scanned page as NSData and then add the page to a PDFDocument.

However, despite setting it to memory based, it still works as file based. After scanning, the scan gets saved as a file and preview opens up and I'm not able to get NSData in the delegate, only NSUrl works.

Answer 1

Setting that is known to be buggy.

refer to for possible flawed workaround: http://lists.apple.com/archives/cocoa-dev/2011/May/msg00727.html