UIView.Notifications.ObserveGrayscaleStatusDidChange UIView.Notifications.ObserveGrayscaleStatusDidChange Method

Definition

Overloads

ObserveGrayscaleStatusDidChange(EventHandler<NSNotificationEventArgs>) ObserveGrayscaleStatusDidChange(EventHandler<NSNotificationEventArgs>)

Strongly typed notification for the GrayscaleStatusDidChangeNotification constant.

ObserveGrayscaleStatusDidChange(NSObject, EventHandler<NSNotificationEventArgs>) ObserveGrayscaleStatusDidChange(NSObject, EventHandler<NSNotificationEventArgs>)

Strongly typed notification for the GrayscaleStatusDidChangeNotification constant.

ObserveGrayscaleStatusDidChange(EventHandler<NSNotificationEventArgs>) ObserveGrayscaleStatusDidChange(EventHandler<NSNotificationEventArgs>)

Strongly typed notification for the GrayscaleStatusDidChangeNotification constant.

public static Foundation.NSObject ObserveGrayscaleStatusDidChange (EventHandler<Foundation.NSNotificationEventArgs> handler);
static member ObserveGrayscaleStatusDidChange : EventHandler<Foundation.NSNotificationEventArgs> -> Foundation.NSObject

Parameters

handler
EventHandler<NSNotificationEventArgs>

Method to invoke when the notification is posted.

Returns

Token object that can be used to stop receiving notifications by either disposing it or passing it to RemoveObservers(IEnumerable<NSObject>)

Remarks

This method can be used to subscribe for GrayscaleStatusDidChangeNotification notifications.


// Listen to all notifications posted for any object
var token = UIView.Notifications.ObserveGrayscaleStatusDidChange ((notification) => {
	Console.WriteLine ("Observed GrayscaleStatusDidChangeNotification!");
};

// Listen to all notifications posted for a single object var token = UIView.Notifications.ObserveGrayscaleStatusDidChange (objectToObserve, (notification) => { Console.WriteLine ($"Observed GrayscaleStatusDidChangeNotification for {nameof (objectToObserve)}!"); };

// Stop listening for notifications token.Dispose ();

ObserveGrayscaleStatusDidChange(NSObject, EventHandler<NSNotificationEventArgs>) ObserveGrayscaleStatusDidChange(NSObject, EventHandler<NSNotificationEventArgs>)

Strongly typed notification for the GrayscaleStatusDidChangeNotification constant.

public static Foundation.NSObject ObserveGrayscaleStatusDidChange (Foundation.NSObject objectToObserve, EventHandler<Foundation.NSNotificationEventArgs> handler);
static member ObserveGrayscaleStatusDidChange : Foundation.NSObject * EventHandler<Foundation.NSNotificationEventArgs> -> Foundation.NSObject

Parameters

objectToObserve
NSObject NSObject

The object to observe.

handler
EventHandler<NSNotificationEventArgs>

Method to invoke when the notification is posted.

Returns

Token object that can be used to stop receiving notifications by either disposing it or passing it to RemoveObservers(IEnumerable<NSObject>)

Remarks

This method can be used to subscribe for GrayscaleStatusDidChangeNotification notifications.


// Listen to all notifications posted for any object
var token = UIView.Notifications.ObserveGrayscaleStatusDidChange ((notification) => {
	Console.WriteLine ("Observed GrayscaleStatusDidChangeNotification!");
};

// Listen to all notifications posted for a single object var token = UIView.Notifications.ObserveGrayscaleStatusDidChange (objectToObserve, (notification) => { Console.WriteLine ($"Observed GrayscaleStatusDidChangeNotification for {nameof (objectToObserve)}!"); };

// Stop listening for notifications token.Dispose ();

Applies to