UIApplication.Notifications.ObserveWillChangeStatusBarOrientation UIApplication.Notifications.ObserveWillChangeStatusBarOrientation Method

Definition

Overloads

ObserveWillChangeStatusBarOrientation(EventHandler<UIStatusBarOrientationChangeEventArgs>) ObserveWillChangeStatusBarOrientation(EventHandler<UIStatusBarOrientationChangeEventArgs>)

Strongly typed notification for the WillChangeStatusBarOrientationNotification constant.

ObserveWillChangeStatusBarOrientation(NSObject, EventHandler<UIStatusBarOrientationChangeEventArgs>) ObserveWillChangeStatusBarOrientation(NSObject, EventHandler<UIStatusBarOrientationChangeEventArgs>)

Strongly typed notification for the WillChangeStatusBarOrientationNotification constant.

ObserveWillChangeStatusBarOrientation(EventHandler<UIStatusBarOrientationChangeEventArgs>) ObserveWillChangeStatusBarOrientation(EventHandler<UIStatusBarOrientationChangeEventArgs>)

Strongly typed notification for the WillChangeStatusBarOrientationNotification constant.

public static Foundation.NSObject ObserveWillChangeStatusBarOrientation (EventHandler<UIKit.UIStatusBarOrientationChangeEventArgs> handler);
static member ObserveWillChangeStatusBarOrientation : EventHandler<UIKit.UIStatusBarOrientationChangeEventArgs> -> Foundation.NSObject

Parameters

handler
EventHandler<UIStatusBarOrientationChangeEventArgs>

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.ObserveWillChangeStatusBarOrientation ((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.ObserveWillChangeStatusBarOrientation (Callback); }

void Teardown () { notification.Dispose (); }

ObserveWillChangeStatusBarOrientation(NSObject, EventHandler<UIStatusBarOrientationChangeEventArgs>) ObserveWillChangeStatusBarOrientation(NSObject, EventHandler<UIStatusBarOrientationChangeEventArgs>)

Strongly typed notification for the WillChangeStatusBarOrientationNotification constant.

public static Foundation.NSObject ObserveWillChangeStatusBarOrientation (Foundation.NSObject objectToObserve, EventHandler<UIKit.UIStatusBarOrientationChangeEventArgs> handler);
static member ObserveWillChangeStatusBarOrientation : Foundation.NSObject * EventHandler<UIKit.UIStatusBarOrientationChangeEventArgs> -> Foundation.NSObject

Parameters

objectToObserve
NSObject NSObject

The object to observe.

handler
EventHandler<UIStatusBarOrientationChangeEventArgs>

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 WillChangeStatusBarOrientationNotification notifications.


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

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

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

Applies to