Hi, just want to let you know that after getting some much-needed inspiration
from the Core Recipes sample code, I've jury-rigged my outline view into
working. What it involved was selecting the data model file (*.xcdatamodel),
and then going up to New File assistant in the File menu in Xcode. There is an
option there that only appears when a data model is selected, for "Managed
Object Class." It will automatically do all the heavy lifting for you of making
a custom managed object class; then all you have to do (at least this is what I
did) is modify the accessors etc. to your liking. For example, I added isLeaf
and count methods to it because I was getting some errors about those selectors
not being there. So in conclusion, it seems that NSTreeController is still
fairly broken (I'm not too educated on it, but based on what I've read on the
blogs I'd have to agree), but there are some fairly decent ways of getting
around its problems. For more information on this I'd suggest (a) Wil
Shipley's excellent treatment of the topic in his blog, and (b) the Core
Recipes DMG.
Sam
