Instance Method


Raises an exception.


func removeObserver(_ observer: NSObject, forKeyPath keyPath: String)



The object to remove as an observer.


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


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

Beta Software

This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.

Learn more about using Apple's beta software