Shyam Shyam - 1 year ago 192
Swift Question

Using UNUserNotificationCenter to support iOS 10 rich notifications, but the notification never shows up. It only sounds the alert

Not sure, what's missing, but I'm stuck with a weird problem!!!

Notification sounds, but isn't displayed.

I have registered the app to only display alerts and sounds, and strangely it never is displayed. I can see that the notification is added successfully. But, there seems to be something trivial that I'm not able to comprehend.

Even removing the notification works.

import Foundation
import NotificationCenter
import UserNotifications

class NotificationManager: NSObject {

private let categoryIdentifier = "notificationCategory"

private var toDateComponents = NSDateComponents()

private enum actionIdentifier : String {
case openApp = "openApp"
case playMusic = "playMusic"

// MARK: - Register for notifications

func registerForNotifications(application: UIApplication) {
if #available(iOS 10.0, *) {
UNUserNotificationCenter.currentNotificationCenter().getNotificationSettingsWithCompletionHandler { notificationSettings in
switch notificationSettings.authorizationStatus {
case .NotDetermined:
UNUserNotificationCenter.currentNotificationCenter().requestAuthorizationWithOptions([.Alert, .Sound]) { (granted, error) in
// Enable or disable features based on authorization
if granted {
print("Access requested and was granted for sending notifications")
UNUserNotificationCenter.currentNotificationCenter().delegate = self
} else {
print("Access requested and was denied for sending notifications")
case .Denied:
print("Notifications are turned off!!")
break // nothing to do, pointless to go on
case .Authorized:
} else {
// Nothing to do here
print("iOS 9 says, Let's get started...")

// MARK: - Setup notification actions

private func setupNotificationActions() {

// Initialize and specify the notification actions
if #available(iOS 10.0, *) {
let openAppAction = UNNotificationAction(identifier: actionIdentifier.openApp.rawValue, title: "Open App", options: [.AuthenticationRequired, .Foreground])
let playMusicAction = UNNotificationAction(identifier: actionIdentifier.playMusic.rawValue, title: "Play Music", options: [])
let notificationCategory = UNNotificationCategory(identifier: categoryIdentifier, actions: [openAppAction, playMusicAction], intentIdentifiers: [], options: [.CustomDismissAction])

} else {
// Specify the notification actions
let openAppAction = UIMutableUserNotificationAction()
openAppAction.identifier = actionIdentifier.openApp.rawValue
openAppAction.title = "Open App"
openAppAction.activationMode = UIUserNotificationActivationMode.Foreground
openAppAction.destructive = false

let playMusicAction = UIMutableUserNotificationAction()
playMusicAction.identifier = actionIdentifier.playMusic.rawValue
playMusicAction.title = "Play Music"
playMusicAction.activationMode = UIUserNotificationActivationMode.Background
playMusicAction.destructive = false
playMusicAction.authenticationRequired = false

// Specify the category related to the above actions
let notificationCategory = UIMutableUserNotificationCategory()
notificationCategory.identifier = categoryIdentifier
notificationCategory.setActions([openAppAction, playMusicAction], forContext: UIUserNotificationActionContext.Default)
notificationCategory.setActions([playMusicAction], forContext: UIUserNotificationActionContext.Minimal)

let notificationSettings = UIUserNotificationSettings(forTypes: [.Alert, .Sound], categories: NSSet(object: notificationCategory) as? Set<UIUserNotificationCategory>)
// if (notificationSettings.types != UIUserNotificationType.None){
// }

And, in AppDelegate...

private let notificationManager = NotificationManager()

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

Answer Source

Delegate should be assigned correctly. Although, I wasn't able to zero in on why this happened, below changes ensured that notifications went through.


class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate {

    private let notificationManager = NotificationManager()

    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

    UNUserNotificationCenter.currentNotificationCenter().delegate = self


Insert the delegate methods in AppDelegate, itself.

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