Contents

removeObserver(_:fromObjectsAt:forKeyPath:context:)

Raises an exception.

Declaration

func removeObserver(_ observer: NSObject, fromObjectsAt indexes: IndexSet, forKeyPath keyPath: String, context: UnsafeMutableRawPointer?)

Parameters

  • observer:

    The object to remove as an observer.

  • indexes:

    The index set.

  • keyPath:

    A key-path, relative to the array, for which observer is registered to receive KVO change notifications. This value must not be nil.

  • context:

    The context passed to the notifications.

Discussion

NSArray objects are not observable, so this method raises an exception when invoked on an NSArray object. Instead of observing an array, observe the to-many relationship for which the array is the collection of related objects.

See Also

Key-Value Observing