Open Radar

 
Area:
UIKit

Summary:
Selecting multiple files in the UIDocumentPickerViewController does not work properly unless the folder is one that is initially shown when the picker is presented.

If you try and navigate into a folder and then tap Select and choose multiple files the `Open` button in the navigation bar no longer seems to work. Tapping the open button doesn't trigger the didPickDocumentsAt delegate method or dismiss the picker.

Steps to Reproduce:
- Make sure you're logged into iCloud on the simulator or device.
- Build and launch sample app (or create your own where you display a UIDocumentPickerViewController with allowsMultipleSelection set to true)
- Navigate into a folder that is not initially shown in the UIDocumentPickerViewController
- Tap `Select` in the nav bar and select a few files
- Try and tap the `Open` button.

Expected Results:
The `didPickDocumentsAt` delegate method receives a list of select URLs and the UIDocumentPickerViewController dismisses.

Observed Results:
The `didPickDocumentsAt` delegate method does not get called and the UIDocumentPickerViewController does not dismiss.

Version:
iOS 11 beta 3

Notes:
If you navigate into the folder then dismiss the UIDocumentPickerViewController, then the next time you open a UIDocumentPickerViewController it will be in that folder and selecting multiple files will work as expected.