CFNotificationCenterRemoveObserver(_:_:_:_:)

Declaration

func CFNotificationCenterRemoveObserver(_ center: CFNotificationCenter!, _ observer: UnsafeRawPointer!, _ name: CFNotificationName!, _ object: UnsafeRawPointer!)

Parameters

• center:

  The notification center to modify.

• observer:

  The observer. This value must not be NULL.

• name:

  The name of the notification to stop observing. If NULL, observer stops receiving callbacks for all notifications posted by object.

• object:

  The object to stop observing. For distributed notifications, object must be a CFString object. If NULL, observer stops receiving callbacks for all objects posting notifications named name.

  If center is a Darwin notification center, this value is ignored.

Discussion

If both name and object are NULL, this function unregisters observer from all the notifications for which it had previously registered with center.

See Also

Adding and Removing Observers

• CFNotificationCenterAddObserver(_:_:_:_:_:_:)
• CFNotificationCenterRemoveEveryObserver(_:_:)