Re: NSArrayController array-observation
Re: NSArrayController array-observation
- Subject: Re: NSArrayController array-observation
- From: Scott Anguish <email@hidden>
- Date: Tue, 25 Nov 2003 17:08:55 -0500
On Nov 25, 2003, at 10:00 AM, Dominik Wagner wrote:
On 23.11.2003, at 21:30, Scott Anguish wrote:
On Nov 23, 2003, at 2:05 PM, Dominik Wagner wrote:
Hi List!
But a KeyPath like this is not allowed. Is there any Keypath for a
tomany relationship that works in this context? The "Array
Operators" don't work here. Observing only the array does not help
either, because then I do not get informed, when mutable content is
changing. Basically it's: How do I observe the contents of an Array?
You can only observe the contents of an array by registering as an
observer on each item in the array. Yes, not the best solution for
you're situation.
Yes, too much overhead for such a simple task.
I'm not sure how.. that's what would happen if the array automatically
supported it.
You could implement a set method for myBool that posts a
notification when the value changes. Not necessarily a good solution
in all cases though.
That would require me to do a model class that is also storeable in
the UserDefaults, the answer here is too much work too.
??? Why would it require this? It shouldn't. Or are you currently
storing these defaults using a dictionary?
And somehow I'm thinking that key-value-observing should be the
solution for exactly this: notifying me of changes.
I've given you two solutions...
Another option might be to make a second accessor with a slightly
different naming scheme (myBoolinIB) that then posted whatever the
change was.
Hmm doesn't sound quite right either.
But this seems to be an important question: what is the right way to
observe non-attribute properties programatically? I mean e.g.
everything stored in the user defaults should somehow be observed by
everything that is concerned, and that includes non UI stuff.
it is. There is an 'interesting' issue if you want to store an array
of values in user defaults (since defaults are not automatically
changed to mutable arrays when they're loaded)
_______________________________________________
cocoa-dev mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/cocoa-dev
Do not post admin requests to the list. They will be ignored.