-[NSTreeController remove:] sends unnecessary -removeObjectsAtIndexes: messages

Originator:kyle.sluder
Number:rdar://10611046 Date Originated:12/20/2011
Status:Open Resolved:
Product:Mac OS X Product Version:10.7.2/1138.23
Classification:Other Bug Reproducible:Always
 
Summary:

If you call -remove: on an NSTreeController, it will send -removeObjectsAtIndexes: to the ancestors of the deleted objects, including to the target of the tree controller's contentArray binding. The NSIndexSet argument will be empty.

There is no need to send these messages, and in fact doing so imposes the otherwise unnecessary restriction that the object to which the tree controller's contentArray binding points be a mutable collection (either an NSMutableArray or a mutable to-many property).

Steps to Reproduce:

1. Build and run the attached demo project.
2. Select a number of non-root objects.
3. Click the Delete button.

Expected Results:

The objects are deleted.

Actual Results:

The objects are deleted, and the AppDelegate logs a bunch of messages complaining that it was asked to -removeObjectsAtIndexes: from the immutable contentArray object.

Comments


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