> On Feb 12, 2016, at 2:16 PM, Quincey Morris > <quinceymor...@rivergatesoftware.com> wrote: > > On Feb 12, 2016, at 14:00 , Michael de Haan <m...@comcast.net > <mailto:m...@comcast.net>> wrote: >> >> I could not get from that binding to the actual instance of my model. There >> does not seem to be an “Array.ObjectAtThisIndexPath" which I think you are >> alluding to? Ie bind this to a local variable (indexPaths) and derive the >> instance of the model from this? > > I still don’t understand what you’re saying. A binding binds to a *property* > of an object — limited by IB to the objects that are available in the > context. In a storyboard scene with a view controller at the top level, this > property must be a property of the view controller. However, if the view > controller has properties that lead elsewhere, you can use a key path to > extend your reach. > > For example, if the view controller itself has a “selectedIndexPaths” > property, you can bind to that. If this property is in a data model instead, > you’ll need to give the view controller a “model” property, and bind to > “model.selectedIndexPaths”. And so on. It’s a bit harder in a storyboard than > a XIB, because you can’t bind directly to the world outside the view > controller (e.g. the window controller) without going through the view > controller. >
> Do you perhaps mean a private instance variable? Yes… I do. And, if I understand you correctly, using the “selectionIndexPaths” binding of the TreeController (from IB) I should be able to use that information to trace it back ( with key paths) to my model instance. Let me play around with that, but I suspect that this is the way to solve this… certainly more elegant than I am trying to. _______________________________________________ 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
