Short Answer: NO, Not in IOS6+
Description:
One thing to note about QLPreviewController is that it's not meant to be customized. There were other libraries allowing you to change the functionality such as:
https://github.com/rob-brown/RBFilePreviewer
Which are not working in iOS 6+ since apple made a big change in QLPreviewController and it's technically running in a separate process. Although it might be possible (not sure) using private apis but your app will be rejected then.
You can find more info about this change here: http://oleb.net/blog/2012/10/remote-view-controllers-in-ios-6/
Hope this helps