A little wrapper for NSNotifications with Swift

Notify.swift

//
//  Notify.swift
//

import Foundation

class Notify {
    static let shared = Notify()
    
    func send(event: NSNotification.Name) {
        NotificationCenter.default.post(name: event, object: nil, userInfo:  nil)
    }
    
    func on(event: NSNotification.Name, perform: @escaping () -> Void) {
        NotificationCenter.default.addObserver(forName: event, object: nil, queue: nil) { (notification) in
            perform()
        }
    }
}

Usage.swift

// Register typesafe events...
extension Notification.Name {
    static let updateView = Notification.Name("updateView")
}

// Send an event
Notify.shared.send(event: .updateView)

// Listen to an event
Notify.shared.on(event: .updateView, perform: {
  // Do something
})