I'm going to re-read Chapter 31 and 32 of Hillegass' book, which more or less cover this subject (view swapping and core data relations). Briefly what he does is is adding a MOC property to each view controller, so its views can use that. I'll post back later.
- Koen. On May 10, 2012, at 12:39 AM, Quincey Morris wrote: > On May 9, 2012, at 19:56 , Koen van der Drift wrote: > >> In my case, the contentset of the array controller is bound to a tree >> controller (which is bound to the MOC of my model). I fail to see how I >> also bind it to an array. > > Well, as to a direct answer, I'm stumped. > > If the array controller is in entity mode, AFAICT there's no binding (to the > data model) that would let the data model keep track of what's selected via > bindings. There simply appears to be no equivalent to the "selectionIndexes" > binding when in entity mode.** > > So you have 2 choices that I can see: > > 1. Shrug and have your view controller monitor the array controller's > "selectedObjects" directly. > > 2. Have your *app delegate* monitor the array controller's "selectedObjects", > and provide the result as a public KVO-compliant property. This would keep > the implementation of how the selection is determined as a private detail of > the app delegate, preventing the array controller dependency from spreading > throughout your application design. > > > ** It's possible that NSArrayController maintains "selectionIndexes" when the > content is a NSOrderedSet, in Lion. In that case, you can maintain (via > bindings) both a tree "selectionIndexPaths" and an ordered set > "selectionIndexes" property in the app delegate, then retrieve the selected > "myThings" objects via a two-step lookup process. I wouldn't bet on it > working, though. > > _______________________________________________ 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
