Open Radar

 
Example project available at https://github.com/benoberkfell/radar_15090681

Summary:
Dismissing a UIDocumentInteractionController in some cases will remove the presenting view controller's views.  This happens when the UIDocumentInteractionController's presenting view controller was wrapped in a UINavigationController presented with the UIModalPresentationPageSheet or UIModalPresentationFormSheet style. 

When the UIDocumentInteractionController is dismissed, the presenting view controller's views are removed, including elements from the UINavigationController.  What remains are a UIDimmingView, UIDropShadowView, and a UIImageView.

Steps to Reproduce:
Refer to sample project, or do the following

1. Create a new empty iOS application in Xcode 5
2. Define a root view controller, with a button
3. That button's target is a function which instantiates another view controller ("Presenting View Controller"), wrapped in a UINavigationController
4.  Define the "Presenting View Controller" to be a UIDocumentInteractionControllerDelegate; documentInteractionControllerViewControllerForPreview should return "self"
5. "Presenting View Controller" has a button which presents a UIDocumentInteractionController with a local file URL
6. Observe that the UIDocumentInteractionController appears correctly
7. Observe when dismissing the UIDocumentInteractionController that "Presenting View Controller's" UI elements are gone

Expected Results:
Expected the UIDocumentInteractionController to dismiss and the presenting view controller's views to remain

Actual Results:
The UIDocumentInteractionController dismisses and the presenting view controller's views are removed, leaving a plain white/gray box where the presenting view controller formerly existed.  The app no longer responds to any touch events after this point.

Version:
iOS 7/11A465

Notes:

Configuration:
Occurs on iPad Simulator (iOS 7.0) and iPad 3 (Wifi) running iOS 7 11A465

Does not matter whether the application was compiled against the iOS 6.1 or iOS 7 SDK