NSTableView column bindings and "deep" key paths
NSTableView column bindings and "deep" key paths
- Subject: NSTableView column bindings and "deep" key paths
- From: Gerd Knops <email@hidden>
- Date: Thu, 14 Jan 2010 10:47:49 -0600
I have a typical NSTableView setup where the column content is provided by an NSArrayController.
Now say a column is bound to arrayController.arrangedObjects key path a.b.c.d.
In this scenario if "b" changes (even in a KVO-complient way), it will still result in an NSInternalInconsistencyException 'Cannot remove an observer xxx for the key path "c.d" from <old instance of "b">, most likely because the value for the key "c" has changed without an appropriate KVO notification being sent.'
I understand why this is happening (nothing is observing changes of "b", so the actual observer is left "dangling").
The question is how can I change my design to avoid this situation?
Thanks
Gerd
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