On Apr 10, 2009, at 10:41AM, Quincey Morris wrote:
However, the NSKeyedUnarchiveFromDataTransformerName transformer
transforms an instance of NSData to an instance of whatever was
archived in it.
So, the default transformer goes *from* NSData. Custom transformers
go *to* NSData.
So, you cannot specify the default transformer explicitly, because
that would make Core Data use it in the wrong direction.
The documentation indicates NSKeyedUnarchiveFromDataTransformerName
supports reverse transformation. Single class with bidirectional
transformation. Use –transformedValue: to go one way and –
reverseTransformedValue: to go the other way.
Richard
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