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Why does Core Data re-enter -beginUndoGrouping at Checkpoint?
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Why does Core Data re-enter -beginUndoGrouping at Checkpoint?


  • Subject: Why does Core Data re-enter -beginUndoGrouping at Checkpoint?
  • From: Jerry Krinock <email@hidden>
  • Date: Tue, 29 Dec 2009 23:12:45 -0800

Sometimes, when Core Data receives a NSUndoManagerCheckpointNotification from -beginUndoGrouping, it invokes -beginUndoGrouping again, so that -beginUndoGrouping is re-entered before it finishes.

Can anyone guess why Core Data might be doing this?

It causes things to get rather hairy when you're trying to get control of your undo groupings.

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