push noti

   func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        // Override point for customization after application launch.
        
        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
    }
    
    func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData) {
        let tokenChars = UnsafePointer<CChar>(deviceToken.bytes)
        var tokenString = ""
        println("tokenString: \(deviceToken)")
        for var i = 0; i < deviceToken.length; i++ {
            tokenString += String(format: "%02.2hhx", arguments: [tokenChars[i]])
        }
        
        println("tokenString: \(tokenString)")
    }