I have set QLPreviewController as A Parent to My UIViewController.
I am able to Show Any file on my View, Using QLPreviewController.
Now, when I open file to View, there is an ActionButton Sets internally,which Provides option for "Open In" , "Print". till this it works fine, but when I click on that ActionButton, a PopOver is Displayed n then if I Clicked Back Button, then my View is Navigated a stage back, but that PopOver Still remains there. & then My Application Crashes.
It seems to be very strange behavior of QLPreviewController.