The Cocoa bindings controller classes only provide key-value observing notifications for selected properties. This article enumerates the key-value-observing compliant properties for each class.
Important: The Cocoa bindings controller classes do not provide change values when sending key-value observing notifications to observers. It is the developer’s responsibility to query the controller to determine the new values.
NSUserDefaultsController is key-value-observing compliant for the following properties:
appliesImmediately
defaults
hasUnappliedChanges
initialValues
values
NSObjectController is key-value-observing compliant for the following properties:
canAdd
canRemove
content
isEditable
objectClass
selectedObjects
selection
NSArrayController is key-value-observing compliant for the following properties:
alwaysUsesMultipleValuesMarker
arrangedObjects
avoidsEmptySelection
canAdd
canInsert
canRemove
canSelectNext
canSelectPrevious
clearsFilterPredicateOnInsertion
content
filterPredicate
isEditable
preservesSelection
selectedObjects
selection
selectionIndex
selectionIndexes
selectsInsertedObjects
sortDescriptors
NSTreeController is key-value-observing compliant for the following properties:
alwaysUsesMultipleValuesMarker
arrangedObjects
avoidsEmptySelection
canAdd
canAddChild
canInsert
canInsertChild
canRemove
canSelectNext
canSelectPrevious
content
isEditable
preservesSelection
selectedObjects
selection
selectionIndexPath
selectionIndexPaths
selectsInsertedObjects
sortDescriptors
Note: The value returned by NSTreeController's arrangedObjects method is opaque. You should only observe this property to determine that a change has occurred.
Last updated: 2009-03-08