nsnotificationcenter

I'm trying to update this code to swift 3: NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name: UIKeyboardWillShowNotification, object: nil) NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name: UIKeyboardWillHideNotification, object: nil)` So far, I've just tried the auto corrections given by the compiler. This results in code like this: let notificationCenter = NotificationCenter.default() notificationCenter.addObserver(self, selector: Selector(("keyboardWillShow:")), name: NSNotification.Name

I am trying to pass an NSDictionary form a UIView to a UIViewController using NSNotificationCenter. The dictionary works fine at the time the notification is posted, but in the receiving method I am unable to access any of the objects in the dictionary. Here is how I am creating the dictionary and posting the notification... itemDetails = [[NSDictionary alloc] initWithObjectsAndKeys:@"Topic 1", @"HelpTopic", nil]; [[NSNotificationCenter defaultCenter] postNotificationName:@"HotSpotTouched" object:itemDetails]; In the UIViewController I am setting the observer... [[NSNotificationCenter

Could somebody please show me how to use the object property on NSNotifcationCenter. I want to be able to use it to pass an integer value to my selector method. This is how I have set up the notification listener in my UI View. Seeing as I want an integer value to be passed I'm not sure what to replace nil with. [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(receiveEvent:) name:@"myevent" object:nil]; - (void)receiveEvent:(NSNotification *)notification { // handle event NSLog(@"got event %@", notification); } I dispatch the notification from another class like this.

In the process of porting an iPhone application over to android, I am looking for the best way to communicate within the app. Intents seem to be the way to go, is this the best (only) option? NSUserDefaults seems much lighter weight than Intents do in both performance and coding. I should also add I have an application subclass for state, but I need to make another activity aware of an event. You could try this: http://developer.android.com/reference/java/util/Observer.html The best equivalent I found is LocalBroadcastManager which is part of the Android Support Package . From the