UIDocument.Notifications.ObserveStateChanged Method
Definition
Important
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Overloads
| Name | Description |
|---|---|
| ObserveStateChanged(EventHandler<NSNotificationEventArgs>) |
Strongly typed notification for the StateChangedNotification constant. |
| ObserveStateChanged(NSObject, EventHandler<NSNotificationEventArgs>) |
Strongly typed notification for the StateChangedNotification constant. |
ObserveStateChanged(EventHandler<NSNotificationEventArgs>)
Strongly typed notification for the StateChangedNotification constant.
public static Foundation.NSObject ObserveStateChanged(EventHandler<Foundation.NSNotificationEventArgs> handler);static member ObserveStateChanged : EventHandler<Foundation.NSNotificationEventArgs> -> Foundation.NSObjectParameters
- handler
- EventHandler<NSNotificationEventArgs>
The handler that responds to the notification when it occurs.
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 to StateChangedNotification notifications.
// Listen to all notifications posted for any object
var token = UIDocument.Notifications.ObserveStateChanged ((notification) => {
Console.WriteLine ("Observed StateChangedNotification!");
};
// Stop listening for notifications
token.Dispose ();
Applies to
ObserveStateChanged(NSObject, EventHandler<NSNotificationEventArgs>)
Strongly typed notification for the StateChangedNotification constant.
public static Foundation.NSObject ObserveStateChanged(Foundation.NSObject objectToObserve, EventHandler<Foundation.NSNotificationEventArgs> handler);static member ObserveStateChanged : Foundation.NSObject * EventHandler<Foundation.NSNotificationEventArgs> -> Foundation.NSObjectParameters
- objectToObserve
- NSObject
The specific object to observe.
- handler
- EventHandler<NSNotificationEventArgs>
The handler that responds to the notification when it occurs.
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 to StateChangedNotification notifications.
// Listen to all notifications posted for a single object
var token = UIDocument.Notifications.ObserveStateChanged (objectToObserve, (notification) => {
Console.WriteLine ($"Observed StateChangedNotification for {nameof (objectToObserve)}!");
};
// Stop listening for notifications
token.Dispose ();