Randomly shuffle my core data dataset?
Randomly shuffle my core data dataset?
- Subject: Randomly shuffle my core data dataset?
- From: "Steven Harms" <email@hidden>
- Date: Tue, 28 Mar 2006 04:28:04 -0800
Hi, List,
I've recently tried to get the hang of Core data and worked through
the cocoadev example where a "blog" like application is created.
I thought it would be handy to make a flash-card program for review of
concepts using Core Data.
I was able to set up the interface and data model no problem, but I
have three requirements left.
When "reviewing" the dataset (an NSArrayController manages the "cards"
entities), i must be able to shuffle the array controller. Where can
i get a hold of the Array controller and shuffle it? I tried on the
awakeFromNib method of the app delegate, but the entities had not yet
been loaded. Is there a standard place to get a hold of that?
When reviewing a card, i must shuffle the four potential answers (i.e.
answer 1 must appear in TextField 4, etc.). Again, how can i shuffle
these "potential answers". If the screen widgets weren't "bound" I
could see the controller grabbing the contents of the 4 textfields,
randomly cycle 4 times, and thus shuffling the anwers. Is the
fetchRequest the right place to do that? I think it is, but i don't
see how to do it.
It must be possible to send a card to a "Wrong Answer" stack so that
you can just review your wrong cards at some later point. Essentially
i need to be able to add a "card" to an NSArrayController.
Honestly, I don't know where to start on this problem. I'm sorta just
into the depth of the murk here having passed the traditional tutorial
(which sets up a basic application) and trying to extend it into
something richer.
Thanks for any pointers,
Steven
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