I think in order for this to work you have to makesure you have a key/value compliant getter & setter for the boolean value and then in the code you have to use
[someObject setValue: ForKey:]; This will then notify any observers (i.e your array controller) that the value has changed and update it accordingly. -Mic 2009/3/13 Shamyl Zakariya <sha...@gmail.com>: > Hi, > > I'm belatedly dipping my toes into NSPredicate to do some array filtering. I > have an array of objects which have (among other things) a boolean property. > In my UI, I have three tables: > > 1) The first table has all the entries in the array. > 2) The second table uses an NSPredicate to filter the array and show only > the entries where the boolean property is true. > 3) The third table is the opposite of #2, it shows entries where the boolean > property is false. > > For clarity: I'm using a unique NSArrayController for each of the above, > instantiated in my nib file. > > So on load, the boolean property is set by some simple image processing ( > I'm filtering a folder of images into two sets based on analysis of the > images' pixels ). > > So far, this works. I see the right images showing up in the aforementioned > tables. > > However, I'd like to be able to manually override the results of the image > processing -- say due to false positive or whatever -- and as such I put a > checkbox in the first table ( the "all" table ) which toggles that boolean > property. > > The trouble is that toggling that boolean property on an entry doesn't > update the contents of the two filtered arrays. > > I figure there's got to be some way to make the array controllers for those > filtered tables know that the values have changed. In the past, I've done > some kind of hacky stuff to make this work, such as binding a faux property > in my app/doc controller to the array controller using > "arrangeObjects.propertyName" -- then in my +initialize method I passed > those faux properties to setKeys: triggerChangeNotificationsForDependentKey: > to get the change recognized. > > If something like that's really the only way to go, then that's fine. But I > feel like there's got to be some way that's a little more elegant. > > Note: I'm not using core data -- my "model" is just an NSArray of my image > processing objects. > > Thanks in advance, > > > shamyl zakariya > "authentic frontier gibberish" > > > > > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/cocoa-dev/micpringle%40gmail.com > > This email sent to micprin...@gmail.com > _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
