Setup push notifications in Swift

appDelegate.swift

/**
 * How to setup push notifications in Swift
 * http://stackoverflow.com/questions/24899257/how-to-setup-push-notifications-in-swift
 */

import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        
        // Register for Push Notitications, if running iOS 8
        if application.respondsToSelector("registerUserNotificationSettings:") {
        
          let types:UIUserNotificationType = (.Alert | .Badge | .Sound)
          let settings:UIUserNotificationSettings = UIUserNotificationSettings(forTypes: types, categories: nil)
        
          application.registerUserNotificationSettings(settings)
          application.registerForRemoteNotifications()
        
        } else {      
          // Register for Push Notifications before iOS 8
          application.registerForRemoteNotificationTypes(.Alert | .Badge | .Sound)
        }
        
        return true
    }
}