On 28 Apr 2015, at 6:54 PM, Rick Mann <[email protected]> wrote:
> I have a window made up of a couple of NSSplitViewControllers and custom view
> controllers. It's mostly a master-detail type of thing, where the selected
> item in the first split sets up the second, and a selected item there sets up
> the third.
>
> Thing is, I don't see a good way to bind from one view controller to the
> other. I could subclass NSSplitViewController, override -prepareForSegue:,
> and inject references to the NSArrayControllers that way, but that means
> subclassing NSSplitViewController, which seems rather lame.
I almost devoted half-a-chapter to how disastrous and inexplicable this is,
until I figured out the rules. Part of the rant made it through to the page
proofs (print minus one).
Storyboards are not monoliths at runtime, they’re an archive of NIBs, one for
each view controller. Cross-controller relationships are missing only in the
sense that they are impossible. That includes parent-child relationships from
window controllers across split-view controllers.
A window controller has a reference to its content controller. Descend that
into the split-view controller and index the splits, then recover the content
controller for each. In the process, you can propagate the child controllers up
to the window controller (or whatever).
— F
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