Implement actionable push notification for iOS APP in Swift. Use Google Firebase for pushing notifications.

Note

Server send notification using FCM Notification Message type with an identifier. The sample program below use “NOTIFICATION_CUSTOM” as the actionable notification id.

Define actionable notification

Define the actionable notification via UNNotificationCategory & UNUserNotificationCenter

1
2
3
4
5
6
7
8
9
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    ...
    application.registerForRemoteNotifications()
    UNUserNotificationCenter.current().delegate = self
    Messaging.messaging().delegate = self

    self.registerCustomActions()
    ...
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
private func registerCustomActions() {
    // Define the custom actions.
    let action1 = UNNotificationAction(identifier: "CUS_ACTION1",
                                       title: "Action1",
                                       options: [.foreground])
    let action2 = UNNotificationAction(identifier: "CUS_ACTION2",
                                       title: "Action2",
                                       options: [.foreground])
    // Define the notification type
    let actionCategory = UNNotificationCategory(identifier: "NOTIFICATION_CUSTOM",
                                            actions: [action1, action2],
                                            intentIdentifiers: [],
                                            hiddenPreviewsBodyPlaceholder: "",
                                            options: .customDismissAction)
    
    // Register the notification type.
    let notificationCenter = UNUserNotificationCenter.current()
    notificationCenter.setNotificationCategories([actionCategory])
}

Handle notification actions

Handle the notification actions in userNotificationCenter didReceive function

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
        
    print("didReceive notification")
    let userInfo = response.notification.request.content.userInfo
    let id = response.notification.request.content.categoryIdentifier
    print("info \(userInfo) \(id)")

    if id == "NOTIFICATION_CUSTOM"{
        
        switch response.actionIdentifier {
        case "CUS_ACTION1":
            // Handle action1
          
        case "CUS_ACTION2":
            // Handle action2
        
        default:
            break
    }
}