How to cancel UserNotifications

Question

How I can disable/cancel already setted notification?

Here is my schedule function.

func scheduleNotif(date: DateComponents, completion: @escaping (_ Success: Bool) -> ()) {

    let notif = UNMutableNotificationContent()

    notif.title = "Your quote for today is ready."
    notif.body = "Click here to open an app."

    let dateTrigger = UNCalendarNotificationTrigger(dateMatching: date, repeats: true)
    let request = UNNotificationRequest(identifier: "myNotif", content: notif, trigger: dateTrigger)

    UNUserNotificationCenter.current().add(request, withCompletionHandler: { error in

        if error != nil {
            print(error)
            completion(false)
        } else {
            completion(true)
        }
    })
}

score 45 · Accepted Answer · answered Nov 12 '16 at 14:00

45

For cancelling all pending notifications, you can use this:

UNUserNotificationCenter.current().removeAllPendingNotificationRequests()

For cancelling specific notifications,

UNUserNotificationCenter.current().getPendingNotificationRequests { (notificationRequests) in
   var identifiers: [String] = []
   for notification:UNNotificationRequest in notificationRequests {
       if notification.identifier == "identifierCancel" {
          identifiers.append(notification.identifier)
       }
   }
   UNUserNotificationCenter.current().removePendingNotificationRequests(withIdentifiers: identifiers)
}

answered Nov 12 '16 at 14:00

KrishnaCA

5,615
1
21
31

Inside AppDelegate where we want to call this function?, inside `didReceiveRemoteNotification` or `application(received remoteMessage: MessagingRemoteMessage)` – Kavin Kumar Arumugam Jun 20 '18 at 08:25
2

This is for cancelling a scheduled local notification. It can be called from anywhere since `UNUserNotificationCenter.current()` is a singleton object – KrishnaCA Jun 21 '18 at 19:48

score 12 · Answer 2 · answered Nov 12 '16 at 14:05

The way same UNNotification is identify are base on the identifier passed when you create the UNNotificationRequest.

In your example above,

let request = UNNotificationRequest(identifier: "myNotif", content: notif, trigger: dateTrigger)

You have actually hardcoded the identifier to be "myNotif". This way, whenever you want to delete the already set notification you can do this:

UNUserNotificationCenter.current().removePendingNotificationRequests(withIdentifiers: "myNotif")

However, do take note that when you hardcode the identifier, every time when you add a request to UNUserNotificationCenter the notification is actually being replaced.

Example, if you scheduled a "myNotif" request set on 1 minute later but you call another function to schedule a "myNotif" at 1 hour later it will be replaced. Therefore only the latest "myNotif" at one hour later will be in the pendingNotificationRequest.

score -5 · Answer 3 · edited May 23 '17 at 12:18

-5

As mentioned here you can cancel all notifications with the following code:

UIApplication.sharedApplication().cancelAllLocalNotifications()

edited May 23 '17 at 12:18

Community

1
1

answered Nov 12 '16 at 13:46

Yannick Winter

103
2
11

How to cancel UserNotifications

3 Answers3

Linked