![]() Retrieves the values of the specified keys. Indicates that this object does not recognize the specified selector. Releases the resources used by the NSObject object. Indicates that a change occurred on the specified key. Indicates a change occurred to the indexes for a to-many relationship.ĭidChange(NSString, NSKeyValueSetMutationKind, NSSet) Performs a copy of the underlying Objective-C object.ĭidChange(NSKeyValueChange, NSIndexSet, NSString) Invoked to determine if this object implements the specified protocol. Invokes asynchrously the specified code on the main UI thread.īind(NSString, NSObject, String, NSDictionary)īind(String, NSObject, String, NSDictionary)ĬommitEditing(NSObject, Selector, IntPtr) Overriders must call base.AwakeFromNib().īeginInvokeOnMainThread(Selector, NSObject) Registers an object for being observed externally using an arbitrary method.ĪddObserver(String, NSKeyValueObservingOptions, Action)ĪddObserver(String, NSObject, NSOperationQueue, Action)Ĭalled after the object has been loaded from the nib file. Observed changes are dispatched to the observer’s object ObserveValue(NSString, NSObject, NSDictionary, IntPtr) method.Īdds an observer for the specified notificationĪddObserver(NSString, NSKeyValueObservingOptions, Action) Registers an object for being observed externally (using string keyPath). Observed changes are dispatched to the observer’s object ObserveValue(NSString, NSObject, NSDictionary, IntPtr) method.ĪddObserver(NSObject, Selector, NSString, NSObject)ĪddObserver(NSObject, String, NSKeyValueObservingOptions, IntPtr) Registers an object for being observed externally (using NSString keyPath). Handle used to represent the methods in the base class for this NSObject.ĪddObserver(NSObject, NSString, NSKeyValueObservingOptions, IntPtr) Returns the current Objective-C retain count for the object. Handle (pointer) to the unmanaged object representation. ![]() The default notification center, system notifications and system-level events are posted to this notification center.ĭescription of the object, the Objective-C version of ToString. Override protected void Dispose(bool disposing)ĭefault constructor that initializes a new instance of this class with no parameters.Ī constructor used when creating managed representations of unmanaged objects Called by the runtime.Ĭonstructor to call on derived classes to skip initialization and merely allocate the object.Ī developer-meaningful description of this object. Void NotificationHandler(NSNotification notification) NotificationToken = (notificationName, NotificationHandler) This token is then used as the parameter to RemoveNotification when you want to stop listening to a particular event. When you use any of the AddObserver methods in this class that take an Action parameter, the AddObserver will return a token. We recommend that you use the C# versions of these methods, as you can directly connect delegates, lambdas and methods directly into your code. To register for notifications, you can use the AddObserver method. For convenience there are overloads that take C# strings. Notifications are usually NSString fields that are hosted in some class, for example the Objective-C UITextViewTextDidChangeNotification is found in the class UITextView as the TextDidChangeNotification. This can be used to filter the amount of notifications received. It is also possible to subscribe only to notifications issued by a specific object. When subscribing to a notification, it is possible to subscribe only to a certain kind of notification by specifying the notification name (or null to listen to all notifications posted to the notification center). If you need to deliver notifications from a background thread, use the BeginInvokeOnMainThread(Action) method to wrap your posting into a delegate that is invoked on the main thread. Notifications are posted on the same thread as the calling thread which could have undesired effects. Posting a notification is a synchronous process, which means that invoking one of the Post messages on the notification center will block execution until all of the notification handlers have completed running. The NSNotificationCenter.DefaultCenter plays a central role in the application as this is where system notifications are posted for interesting system-level events. The messages that are posted are synchronous. ![]() The NSNotificationCenter is a hub that is used to listen to broadcast messages and post broadcast messages in an application.
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