Re: NSArrayController & NSTreeController default sort order
Re: NSArrayController & NSTreeController default sort order
- Subject: Re: NSArrayController & NSTreeController default sort order
- From: "I. Savant" <email@hidden>
- Date: Tue, 22 Jan 2008 14:09:05 -0500
On Jan 22, 2008 2:06 PM, I. Savant <email@hidden> wrote:
> > > How do I set up the bindings correct
> > > so my controllers fetch the data pre-sorted?
> >
> > Subclass your controller and override -arrangeObjects:.
>
> Um ... or, you could use the controller's -setSortDescriptors:
> method or its sortDescriptors binding since they're there for just
> that purpose.
Addendum: Of course if you're using Core Data, you need to be aware
that there's no pre-determined order in which you'll receive members
of a fetch (which is the case with your controller). You'd need to add
a sortable attribute to your entity like, "sortOrder" and assign each
instance a sane value. You'd use that key when setting your
controller's sort descriptors.
--
I.S.
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