Re: Core-Data Non-Standard Attributes
Re: Core-Data Non-Standard Attributes
- Subject: Re: Core-Data Non-Standard Attributes
- From: Jeff LaMarche <email@hidden>
- Date: Wed, 4 Jan 2006 12:04:02 -0500
On Jan 4, 2006, at 11:28 AM, Volker Schumacher wrote:
Apple provides some documentation about storing non-standard
attributes
[http://developer.apple.com/documentation/Cocoa/Conceptual/CoreData/
Articles/cdNSAttributes.html],
but they are only talking about "structures supported by key-value
coding (NSPoint, NSSize, NSRect, or NSRange)" in the "Non-Object
Attribute" section,
so i'm a little bit confused how to implement custom attributes for
my float-array or other C-structs.
Can i do it the same way as described in the "Non-Object Attribute"
section of that document?
Yep. You're responsible for doing the translating between your non-
object and the concrete attribute that will actually store it. You
can do it any way you want. You could, for example, convert the
floats to NSNumbers and shove them into a dictionary, or you could
write a method to create a comma separated string of the values, or
whatever ways tickles your fancy as long as you can turn it into an
object, and then back from that object. Everything else should work
the same as described in the page you reference.
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