UIApplication.Notifications.ObserveDidChangeStatusBarOrientation Method
Definition
Important
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Overloads
| ObserveDidChangeStatusBarOrientation(NSObject, EventHandler<UIStatusBarOrientationChangeEventArgs>) |
Strongly typed notification for the DidChangeStatusBarOrientationNotification constant. |
| ObserveDidChangeStatusBarOrientation(EventHandler<UIStatusBarOrientationChangeEventArgs>) |
Strongly typed notification for the DidChangeStatusBarOrientationNotification constant. |
ObserveDidChangeStatusBarOrientation(NSObject, EventHandler<UIStatusBarOrientationChangeEventArgs>)
Strongly typed notification for the DidChangeStatusBarOrientationNotification constant.
public static Foundation.NSObject ObserveDidChangeStatusBarOrientation (Foundation.NSObject objectToObserve, EventHandler<UIKit.UIStatusBarOrientationChangeEventArgs> handler);static member ObserveDidChangeStatusBarOrientation : Foundation.NSObject * EventHandler<UIKit.UIStatusBarOrientationChangeEventArgs> -> Foundation.NSObjectParameters
- objectToObserve
- NSObject
The object to observe.
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 DidChangeStatusBarOrientationNotification notifications.
// Listen to all notifications posted for any object
var token = UIApplication.Notifications.ObserveDidChangeStatusBarOrientation ((notification) => {
Console.WriteLine ("Observed DidChangeStatusBarOrientationNotification!");
};
// Listen to all notifications posted for a single object
var token = UIApplication.Notifications.ObserveDidChangeStatusBarOrientation (objectToObserve, (notification) => {
Console.WriteLine ($"Observed DidChangeStatusBarOrientationNotification for {nameof (objectToObserve)}!");
};
// Stop listening for notifications
token.Dispose ();
Applies to
ObserveDidChangeStatusBarOrientation(EventHandler<UIStatusBarOrientationChangeEventArgs>)
Strongly typed notification for the DidChangeStatusBarOrientationNotification constant.
public static Foundation.NSObject ObserveDidChangeStatusBarOrientation (EventHandler<UIKit.UIStatusBarOrientationChangeEventArgs> handler);static member ObserveDidChangeStatusBarOrientation : EventHandler<UIKit.UIStatusBarOrientationChangeEventArgs> -> Foundation.NSObjectParameters
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
The following example shows how developers can use this method in their code:
//
// Lambda style
//
// listening
notification = UIApplication.Notifications.ObserveDidChangeStatusBarOrientation ((sender, args) => {
/* Access strongly typed args */
Console.WriteLine ("Notification: {0}", args.Notification);
Console.WriteLine ("StatusBarOrientation", args.StatusBarOrientation);
});
// To stop listening:
notification.Dispose ();
//
//Method style
//
NSObject notification;
void Callback (object sender, UIKit.UIStatusBarOrientationChangeEventArgs args)
{
// Access strongly typed args
Console.WriteLine ("Notification: {0}", args.Notification);
Console.WriteLine ("StatusBarOrientation", args.StatusBarOrientation);
}
void Setup ()
{
notification = UIApplication.Notifications.ObserveDidChangeStatusBarOrientation (Callback);
}
void Teardown ()
{
notification.Dispose ();
}