How can I use a scanner with my app?

Question

I'm making an app that takes NSData (of a file) and displays it in a WebView (with the appropriate mime type). I would also like to use a printer/scanner to insert the data. How can I get the scanner to work with my app? I've down a lot of research, but there doesn't seem to be much internet resource. I think I would need an IKScannerDeviceView, but I'm not sure. I would like to just connect to a scanner, scan a document in it, then get the scanned document and save it as an NSData object. Is there any way to do this? I would really like some help, and please don't hate on me if I'm missing something obvious. I'm a noob (FYI).