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Editorial Team
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Asked: 2026-06-17T01:53:29+00:00

I’m finding a little lost trying to populate a NSOutlineView from an NSTreeController, I

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I’m finding a little lost trying to populate a NSOutlineView from an NSTreeController, I can see the tree with data but the leaf nodes have the same data as the parent.

I’ve read a ton of references to this but I feel a little overheated and can’t figure out what I’m not understanding.

My model is:

— File
— Figures (contents of file)

I cant post images directly cause I have not enough reputation ^^.

Model relationship scr1

TreeController managedObjectContext bindings:

— Key Paths -> Children: lineas
— Object Controller -> Mode: Entity Name -> Entity Name: File -> Prepares Content

NSOutlineView tablecell bindings

— Bindings Value -> TreeController -> Controller Key: fecha

Result src2

I thank you all in advance!.

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1 Answer

  1. Editorial Team

    It seems like you don’t set the predicate to filter out the children.
    With treecontroller selected in Interface Builder, in attribute inspector, set the predicate text field to, for example, parent == nil

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