Keep the iOS pick open when a swipe down is cancelled

packages/file_picker_darwin/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.1.4
+
+- Fixed a partial swipe down on the iOS picker sheet completing the pick as cancelled while the picker stayed open, which dropped the files selected afterwards. [#2243](https://github.com/vicajilau/flutter_file_picker/issues/2243)
+
 ## 2.1.3
 
 - Fixed `saveFile()` on macOS appending a second, lowercased extension to file names with a custom extension, such as `j.nme2mbAllpreset`. [#2238](https://github.com/vicajilau/flutter_file_picker/issues/2238)

packages/file_picker_darwin/darwin/file_picker_darwin/Sources/file_picker_darwin/IOSFilePickerHandler.swift

@@ -189,8 +189,27 @@ final class IOSFilePickerHandler: NSObject,
         finishCurrentRequest(nil)
     }
 
-    func presentationControllerWillDismiss(_: UIPresentationController) {
-        finishCurrentRequest(nil)
+    func presentationControllerWillDismiss(
+        _ presentationController: UIPresentationController
+    ) {
+        // UIKit calls this as soon as the user starts pulling the sheet down,
+        // even if they let it spring back, so finishing right away would
+        // report a cancellation while the picker is still open and drop the
+        // later selection. Wait for the dismissal to end instead. A fast swipe
+        // may never reach presentationControllerDidDismiss, so this still
+        // finishes the request when the dismissal completes.
+        guard
+            let coordinator = presentationController.presentedViewController
+                .transitionCoordinator
+        else {
+            finishCurrentRequest(nil)
+            return
+        }
+        coordinator.animate(alongsideTransition: nil) { [weak self] context in
+            if !context.isCancelled {
+                self?.finishCurrentRequest(nil)
+            }
+        }
     }
 
     func presentationControllerDidDismiss(

packages/file_picker_darwin/pubspec.yaml

@@ -1,6 +1,6 @@
 name: file_picker_darwin
 description: Darwin (iOS and macOS) implementation of the file_picker plugin, supporting native file picking, saving, and directory selection.
-version: 2.1.3
+version: 2.1.4
 homepage: https://github.com/vicajilau/flutter_file_picker/tree/main/packages/file_picker_darwin
 repository: https://github.com/vicajilau/flutter_file_picker/tree/main/packages/file_picker_darwin
 topics: