Built-In Actions UIDocumentBrowserViewController

Is it possible to control which built-in actions appear in the UIDocumentBrowserActionAvailabilityMenu / UIDcoumentBrowserActionAvailabilityNavigationBar associated with a UIDocumentBrowserViewController?


I'd like to convert my app's custom browser to the UIDocumentBrowserViewController. Although I'm new to UIDocumentBrowserViewController, its sharing feature seems inconsistent with selling in-app purchases which, in my app, can be represented as a documents.