If you are okay with a minimum requirement of OS X 10.6+, and can suffice with “read-only” access to the stream of events, you can install a global event monitor in Cocoa: Cocoa Event-Handling Guide: Monitoring Events. If you need to support OS X 10.5 and earlier, and read-only access is okay, and don’t mind … Read more
One of your subscribers has been deallocated. Make sure to call [[NSNotificationCenter defaultCenter] removeObserver:self] in your dealloc (if not sooner).
The object parameter represents the sender of the notification, which is usually self. If you wish to pass along extra information, you need to use the NSNotificationCenter method postNotificationName:object:userInfo:, which takes an arbitrary dictionary of values (that you are free to define). The contents needs to be actual NSObject instances, not an integral type such … Read more
Yes you can. Generally you want the NSNotifications to be sent on the main , especially if they trigger UI activities like dismissing a modal login dialog. Delivering Notifications To Particular Threads Regular notification centers deliver notifications on the thread in which the notification was posted. Distributed notification centers deliver notifications on the main thread. … Read more
Use this: CGSize keyboardSize = [[[notification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size; For Swift, you can use: let keyboardSize = (notification.userInfo![UIKeyboardFrameEndUserInfoKey] as! NSValue).cgRectValue.size
The best equivalent I found is LocalBroadcastManager which is part of the Android Support Package. From the LocalBroadcastManager documentation: Helper to register for and send broadcasts of Intents to local objects within your process. This is has a number of advantages over sending global broadcasts with sendBroadcast(Intent): You know that the data you are broadcasting … Read more
There is a cleaner (I think) way to achieve it extension Notification.Name { static let onSelectedSkin = Notification.Name(“on-selected-skin”) } And then you can use it like this NotificationCenter.default.post(name: .onSelectedSkin, object: selectedSkin)
You’ll have to use the “userInfo” variant and pass a NSDictionary object that contains the messageTotal integer: NSDictionary* userInfo = @{@”total”: @(messageTotal)}; NSNotificationCenter* nc = [NSNotificationCenter defaultCenter]; [nc postNotificationName:@”eRXReceived” object:self userInfo:userInfo]; On the receiving end you can access the userInfo dictionary as follows: -(void) receiveTestNotification:(NSNotification*)notification { if ([notification.name isEqualToString:@”TestNotification”]) { NSDictionary* userInfo = notification.userInfo; NSNumber* … Read more
Swift 2.0 Pass info using userInfo which is a optional Dictionary of type [NSObject : AnyObject]? let imageDataDict:[String: UIImage] = [“image”: image] // Post a notification NSNotificationCenter.defaultCenter().postNotificationName(notificationName, object: nil, userInfo: imageDataDict) // Register to receive notification in your class NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(self.showSpinningWheel(_:)), name: notificationName, object: nil) // handle notification func showSpinningWheel(notification: NSNotification) { if let … Read more
Here is a solution, without handling the switch from one textField to another: override func viewDidLoad() { super.viewDidLoad() NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector(“keyboardWillShow:”), name: UIKeyboardWillShowNotification, object: nil) NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector(“keyboardWillHide:”), name: UIKeyboardWillHideNotification, object: nil) } func keyboardWillShow(notification: NSNotification) { if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.CGRectValue() { self.view.frame.origin.y -= keyboardSize.height } } func keyboardWillHide(notification: NSNotification) { self.view.frame.origin.y … Read more