I have created a XLS with advises of:
Export data to *.xls file by using xml to create the file on an iOS 5 App
and
If I open it with openOffice, it works perfectly.
My problem is I´d like open that file with QuickLook framework.
Looking for in Apple Guidelines about QLPreviewController Class Reference:
It says: A Quick Look preview controller can display previews for the following items:
Microsoft Office documents (Office ‘97 and newer)
But I tried with the same file xlsx which I could open with openoffice and it didn´t work with QLPreviewController.