[iOS] Fix: FilePicker.PickAsync hangs on swipe-to-dismiss in older iOS versions #30289
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Hey there @@bhavanesh2001! Thank you so much for your PR! Someone from the team will get assigned to your PR shortly and we'll get it reviewed. |
jfversluis
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Jun 29, 2025
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Description of Change
Follow up to (#29498)
This PR ensures FilePicker.PickAsync completes correctly when the user dismisses the file picker by swiping down on iOS older versions , where WasCancelled is not reliably triggered. ( I can reproduce this on iOS15.5).
Somehow in older iOS versions dismissing the
UIDocumentPickerViewControllervia swipe-down gesture does not invoke theWasCancelledevent. As a result, theTaskCompletionSourceis never completed, causing PickAsync to hang.Fix
UIPresentationController.Delegatewas already used in the legacy delegate-based file picker path.This PR extends that logic to also apply to the modern event-based picker API (DidPickDocumentAtUrls, WasCancelled), ensuring consistent cancellation handling across all code paths.
Issues Fixed
Fixes #30282