Re: Undo in conjunction with core data
Re: Undo in conjunction with core data
- Subject: Re: Undo in conjunction with core data
- From: Kenneth Baxter <email@hidden>
- Date: Sat, 22 Jan 2011 11:55:40 +0000 (GMT)
I thought I would try to do the necessary pre and post-processing using the -willChangeValueForKey:withSetMutation:usingObjects: and -didChangeValueForKey:withSetMutation:usingObjects: methods, and sure enough they get called at the right times, and work just fine for undo, but then when I redo, my Node objects come back as blank empty objects instead of being populated with my data.
Any ideas why this would be?
Essentially the flow is:
1. Create the child, which populates a bunch of things in the awakeFromInsert using primitive set methods.
2. Make some other changes to the object
3. Add it to the children (which triggers my post-processing)
4. Make some more changes to the object
(end of action)
Undo, which removes the child and triggers my pre and post processing to remove related items
Redo, which knows that there is an object to reinsert, but it has nothing populated - not even my initial values that were set originally in awakeFromInsert.
Surely the data should be populated in the object by this stage? I tried willAccessValueForKey:nil in case it was a fault, and checked isFault and isDeleted, but nothing helped.
Thanks
Ken_______________________________________________
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