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QLPreviewController Detection when loading subView / PDF

I use QLPreviewController to display a quick view of a PDF file of approximately 200 KB, which includes several pages. My problem is that even when using a QLPreviewControllerPDF file for rendering, there is still a 5-10 second delay in displaying the actual contents of the PDF file. (a blank white screen is displayed for these seconds)

Is it possible to hook an event / hook so that I can show the download dialog until a full PDF view is viewed? (that is, display the download dialog the first time the view is loaded, then hide the download dialog on subViewDidLoador equivalent)

Note. I am using iOS 4.3.

EDIT 5/23/2013: Later versions of iOS improved this control, so that on each page, the download icon is displayed by default. This way, I did not have to connect to any events to show my own download icon.

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no, there is no way to do this with QLPreviewController. the only thing you could do is better for PDF files: useUIWebView

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