import JSQNotificationObserverKit

// Suppose we have a UIView that posts a notification when its size changes
let myView = UIView()

// This notification posts a CGSize value from a UIView sender
let notification = Notification<CGSize, UIView>(name: "NewViewSizeNotif", sender: myView)

// Register observer, start lisening for the notification
var observer: NotificationObserver<CGSize, UIView>?

observer = NotificationObserver(notification: notification) { (value, sender) in
    // handle notification
    // the value and sender are both passed here
}

// Post the notification with the updated CGSize value
let newViewSize = CGSizeMake(200, 200)
postNotification(notification, value: newViewSize)

// unregister observer, stop listening for notifications
observer = nil

// This notification posts a string value, the sender is nil
let notification = Notification<String, AnyObject>(name: "StringNotif")

// Post the notification
postNotification(notification, value: "new string")

// Register observer, this handles notifications from *any* sender
var observer: NotificationObserver<String, AnyObject>?
observer = NotificationObserver(notification: notification) { (value, sender) in
    // handle notification
    // the value is passed here, sender is nil
}

// unregister observer, stop listening for notifications
observer = nil

// Initialize an observer and post a notification
// with a custom notification center and operation queue
let c = NSNotificationCenter.defaultCenter()

let q = NSOperationQueue.mainQueue()

let observer = NotificationObserver(notification: n, queue: q, center: c) { (value, sender) in
    // handle notification
}

postNotification(n, value: v, center: c)

let notification = Notification<Void, AnyObject>(name: UIApplicationDidReceiveMemoryWarningNotification)

let observer = NotificationObserver(notification: notification) { (value, sender) -> Void in
    // handle notification
    // value is an empty tuple, sender is nil
}

// notification value is `Void`, so pass the empty tuple `()`
postNotification(notification, value: ())