Open Radar

 
Using the UIDocumentInteractionController takes a long while to display when using presentOptionsMenuFromRect.  Now with iOS 8, it's taking an unacceptable amount of time to show a list of applications available to open the document.

There are a range of documents, such as PDFs and Powerpoint presentations.  They are all slow, but the powerpoint presentations (pptx) seem to take the longest, I think quite likely because they are larger files.

Looking at the output in XCode, there is a huge memory spike when performing the presentOptionsMenuFromRect method with a message that says "Unknown Activity Items Supplied" along with "org.openxmlformats.presentationml.presentation".

Steps to Reproduce:
1. Create a tabbed application project
2. Add a CollectionViewController tab with UICollectionViewFlowLayout
3. Add some items to the collection view
4. Add a UIDocumentInteractionController
5. Under collectionView:didSelectItemAtIndexPath use the presentOptionsMenuFromRect method to provide options for viewing the document.


Expected Results:
To get the options menu in a timely manner, within a few seconds.

Actual Results:
Takes around 25-30 seconds to present the options menu.

Apparently a duplicate of 17927875 which is still open.