Sorting problem

Hi!

I'm trying to sort an array of objects (in an NSMutableArray) by using
EOSortOrdering.sortArrayUsingKeyOrderArray().

I can do this easily on normal attributes.  However, I need to sort on
a derived attribute, i.e. a method.  In this case, myValue().

Where do I put this method?  I've tried putting it in the myObject
class as public, but it's not being called by the sort.  I've tried
variations such as getMyValue() and private _myValue() and
_getMyValue(), but so far no joy.  The docs say it should be possible,
but I'm clearly missing out something necessary.

Any ideas?

TIA,
John




 
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