Open Radar

 
Summary:
When canceling the deletion of a cell while the table view is in editing mode, the methods `willTransitionToState:` and `didTransitionToState:` of the cell are not called.

The attached project exhibit this bug by implementing a custom subclass of UITableViewCell logging calls to `willTransitionToState:` and `didTransitionToState:`.

Steps to Reproduce:
Run the attached project:

1. Add a cell to the table view with the '+' button
2. Set the table view to editing mode with the 'Edit' button
3. Tap the delete button (red minus button) of the cell
4. Cancel the deletion by tapping anywhere in the table view

Expected Results:
`willTransitionToState:` and `didTransitionToState:` are each called 3 times:

- one time when tapping the 'Edit' button, with a state value equal to UITableViewCellStateShowingEditControlMask;
- one time when tapping the red minus button, with a state value equal to UITableViewCellStateShowingEditControlMask | UITableViewCellStateShowingDeleteConfirmationMask;
- one time when canceling the deletion, with a state value equal to UITableViewCellStateShowingEditControlMask;

Actual Results:
`willTransitionToState:` and `didTransitionToState:` are each called only 2 times:

- one time when tapping the 'Edit' button;
- one time when tapping the red minus button.

The methods are not called when canceling the deletion. We are never made aware that the cell state returned to UITableViewCellStateShowingEditControlMask.

Version:
iOS 7.1
Xcode 5.1.1 (5B1008)

Notes:
The methods are called just fine when canceling a "swipe to delete" (ie. the table view is not in editing mode).

Partial duplicate of http://openradar.appspot.com/15263423

Related question on StackOverflow: https://stackoverflow.com/questions/20119323