Establish Name Notification For Free

NSNotificationCenter addObserver in Swift import Foundation class User { var userId: String = "" func doLogout() { // write your code to logout the user // you will send an event once the user will be logged out. ... import Foundation import UIKit class HomeController: UIViewController { override func viewDidLoad() { super.

In Swift, Notification names use the nested NSNotification.Name type. That gives us the answer we were looking for. If you switch to Objective-C in the documentation, you can see the type definition of NSNotificationName .

Registering local notification to iOS @IBAction func setReminder(_ sender: Any){ let center = UNUserNotificationCenter.current() let content = UNMutableNotificationContent() content.title = "Notifiaction on a certail date" content.body = "This is a local notification on certain date" content.sound = .default.

A notification dispatch mechanism that enables the broadcast of information to registered observers.

It uses the Observer pattern to inform registered observers when a notification comes in, using a central dispatcher called NotificationCenter. Before we get started, some quick notes: The NotificationCenter class used to be called NSNotificationCenter ? with the ?NS? prefix ? prior to Swift 3.

AddObserver(self, ? This is for the class where we are going to observer notification. selector: #selector(loginSuccess) ? This is the method name, whenever notification will receive this method call. name: NSNotification.Name(?com.

Observer is a behavioral design pattern that allows some objects to notify other objects about changes in their state. The Observer pattern provides a way to subscribe and unsubscribe to and from these events for any object that implements a subscriber interface.

Notification object, identified by name , may contain reference to the object that has sent the notification, and some arbitrary information in the userInfo dictionary. NotificationCenter registers observers and delivers notifications. Objects use NotificationCenter instance to post and observe a notification.

An object containing information broadcast to registered observers that bridges to Notification ; use NSNotification when you need reference semantics or other Foundation-specific behavior.

Notification Center use for broadcasting singles or notifying the methods at the same time. It uses the Observer pattern to inform registered observers when a notification comes in, using a central dispatcher called NotificationCenter.