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@mihf05 mihf05 commented Oct 5, 2025

Fixes #138 - No event generated on iOS when dismissing selection dialog

Problem

When users quickly dismissed iOS file/photo pickers by swiping down before the picker was fully loaded/animated, no dismiss event was generated. This affected both UIDocumentPickerViewController and PHPickerViewController. Only normal cancellation (via Cancel button or full sheet dismissal) worked properly.

Root Cause

  • iOS handles early dismissals differently than normal cancellations
  • Early dismissals only trigger presentationControllerDidDismiss, not the standard picker delegate methods
  • Original implementation didn't implement UIAdaptivePresentationControllerDelegateProtocol

Solution

1. Enhanced DocumentPickerDelegate

  • ✅ Added UIAdaptivePresentationControllerDelegateProtocol implementation
  • ✅ Implemented presentationControllerDidDismiss() to catch early dismissals
  • ✅ Added hasFinished flag to prevent race conditions between delegate methods

2. Enhanced PhPickerDelegate

  • ✅ Added UIAdaptivePresentationControllerDelegateProtocol implementation
  • ✅ Consolidated dismiss handling into single delegate
  • ✅ Added hasFinished flag for race condition prevention

3. Removed PhPickerDismissDelegate

  • ✅ Eliminated separate dismiss delegate to prevent race conditions
  • ✅ Consolidated functionality into PhPickerDelegate for cleaner architecture

4. Updated FileKit.ios.kt

  • ✅ Assigned delegates as both picker delegates and presentation controller delegates
  • ✅ Applied changes to document picker, file saver, and photo picker scenarios
  • ✅ Removed references to deleted PhPickerDismissDelegate

Files Changed

  • Modified: DocumentPickerDelegate.kt - Added presentation controller delegate protocol
  • Modified: PhPickerDelegate.kt - Added presentation controller delegate and consolidated functionality
  • Deleted: PhPickerDismissDelegate.kt - Consolidated into PhPickerDelegate
  • Modified: FileKit.ios.kt - Updated delegate assignments and removed references to deleted class

Why PhPickerDismissDelegate was Deleted

The PhPickerDismissDelegate.kt file was removed because:

  1. Race Condition Prevention: Having two separate delegates could both try to call the continuation simultaneously
  2. Cleaner Architecture: Consolidating both protocols into a single class is cleaner and more maintainable
  3. Consistent Pattern: This matches the pattern used in DocumentPickerDelegate

Testing

  • ✅ iOS compilation verified successfully
  • ✅ No syntax errors in modified files
  • ✅ Maintains backward compatibility

Result

All dismissal scenarios now properly trigger the dismiss callback, including early swipe-to-dismiss gestures.


Type of Change

  • Bug fix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • Breaking change (fix or feature that would cause existing functionality to not work as expected)
  • This change requires a documentation update

Platform Impact

  • iOS
  • Android
  • macOS
  • JVM
  • JS/WASM

Checklist

  • My code follows the style guidelines of this project
  • I have performed a self-review of my own code
  • My changes generate no new warnings
  • The title references the issue number in the format Fixes #138

Fixes vinceglb#138 - No event generated on iOS when dismissing selection dialog

**Problem:**
- When users quickly dismissed iOS file/photo pickers by swiping down before the picker was fully loaded/animated, no dismiss event was generated
- This affected both UIDocumentPickerViewController and PHPickerViewController
- Only normal cancellation (via Cancel button or full sheet dismissal) worked properly

**Root Cause:**
- iOS handles early dismissals differently than normal cancellations
- Early dismissals only trigger presentationControllerDidDismiss, not the standard picker delegate methods
- Original implementation didn't implement UIAdaptivePresentationControllerDelegateProtocol

**Solution:**
1. **Enhanced DocumentPickerDelegate:**
   - Added UIAdaptivePresentationControllerDelegateProtocol implementation
   - Implemented presentationControllerDidDismiss() to catch early dismissals
   - Added hasFinished flag to prevent race conditions between delegate methods

2. **Enhanced PhPickerDelegate:**
   - Added UIAdaptivePresentationControllerDelegateProtocol implementation
   - Consolidated dismiss handling into single delegate
   - Added hasFinished flag for race condition prevention

3. **Removed PhPickerDismissDelegate:**
   - Eliminated separate dismiss delegate to prevent race conditions
   - Consolidated functionality into PhPickerDelegate for cleaner architecture

4. **Updated FileKit.ios.kt:**
   - Assigned delegates as both picker delegates and presentation controller delegates
   - Applied changes to document picker, file saver, and photo picker scenarios
   - Removed references to deleted PhPickerDismissDelegate

**Files Changed:**
- Modified: DocumentPickerDelegate.kt - Added presentation controller delegate protocol
- Modified: PhPickerDelegate.kt - Added presentation controller delegate and consolidated functionality
- Deleted: PhPickerDismissDelegate.kt - Consolidated into PhPickerDelegate
- Modified: FileKit.ios.kt - Updated delegate assignments and removed references to deleted class

**Testing:**
- iOS compilation verified successfully
- No syntax errors in modified files
- Maintains backward compatibility

**Result:**
All dismissal scenarios now properly trigger the dismiss callback, including early swipe-to-dismiss gestures.
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No event generated on iOS when dismissing selection dialog

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