UIApplication.Notifications.ObserveContentSizeCategoryChanged Method
Definition
Important
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Overloads
| ObserveContentSizeCategoryChanged(EventHandler<UIContentSizeCategoryChangedEventArgs>) |
Strongly typed notification for the ContentSizeCategoryChangedNotification constant. |
| ObserveContentSizeCategoryChanged(NSObject, EventHandler<UIContentSizeCategoryChangedEventArgs>) |
Strongly typed notification for the ContentSizeCategoryChangedNotification constant. |
ObserveContentSizeCategoryChanged(EventHandler<UIContentSizeCategoryChangedEventArgs>)
Strongly typed notification for the ContentSizeCategoryChangedNotification constant.
public static Foundation.NSObject ObserveContentSizeCategoryChanged (EventHandler<UIKit.UIContentSizeCategoryChangedEventArgs> handler);static member ObserveContentSizeCategoryChanged : EventHandler<UIKit.UIContentSizeCategoryChangedEventArgs> -> 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.ObserveContentSizeCategoryChanged ((sender, args) => {
/* Access strongly typed args */
Console.WriteLine ("Notification: {0}", args.Notification);
Console.WriteLine ("WeakNewValue", args.WeakNewValue);
});
// To stop listening:
notification.Dispose ();
//
//Method style
//
NSObject notification;
void Callback (object sender, UIKit.UIContentSizeCategoryChangedEventArgs args)
{
// Access strongly typed args
Console.WriteLine ("Notification: {0}", args.Notification);
Console.WriteLine ("WeakNewValue", args.WeakNewValue);
}
void Setup ()
{
notification = UIApplication.Notifications.ObserveContentSizeCategoryChanged (Callback);
}
void Teardown ()
{
notification.Dispose ();
}
Applies to
ObserveContentSizeCategoryChanged(NSObject, EventHandler<UIContentSizeCategoryChangedEventArgs>)
Strongly typed notification for the ContentSizeCategoryChangedNotification constant.
public static Foundation.NSObject ObserveContentSizeCategoryChanged (Foundation.NSObject objectToObserve, EventHandler<UIKit.UIContentSizeCategoryChangedEventArgs> handler);static member ObserveContentSizeCategoryChanged : Foundation.NSObject * EventHandler<UIKit.UIContentSizeCategoryChangedEventArgs> -> 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 ContentSizeCategoryChangedNotification notifications.
// Listen to all notifications posted for any object
var token = UIApplication.Notifications.ObserveContentSizeCategoryChanged ((notification) => {
Console.WriteLine ("Observed ContentSizeCategoryChangedNotification!");
};
// Listen to all notifications posted for a single object
var token = UIApplication.Notifications.ObserveContentSizeCategoryChanged (objectToObserve, (notification) => {
Console.WriteLine ($"Observed ContentSizeCategoryChangedNotification for {nameof (objectToObserve)}!");
};
// Stop listening for notifications
token.Dispose ();