How to import data from existing non-document Core Data store to uimanageddocument?
The question is how to copy from the old managedObjectContext to the new one.
How to import data from existing non-document Core Data store to uimanageddocument?
The question is how to copy from the old managedObjectContext to the new one.
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The answer is to subclass UIManagedDocument, in which import(simply copy)existing store to the document store: