How to cancel a local notification trigger in Swift

Question

I have a trigger to show a notification to the user:

let content = UNMutableNotificationContent()
content.title = "Title"
content.body = "Body"
content.sound = UNNotificationSound.default

let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 20, repeats: false)

let request = UNNotificationRequest(identifier: "TestIdentifier", content: content, trigger: trigger)
UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)

Is there a way for me to cancel that trigger once it has been set?

How do I cancel the notification before the timeInterval runs out and call the notification?

Kathrynekathy

What did you mean by asking this? The system counts the active notifications only. – Alyshaalysia

@Alyshaalysia I ask, let's say I opened a trigger to show a local notification in 15 min, but after 10 minutes I want to cancel that trigger to not show the notification how do I do that? – Kathrynekathy

Use the removePendingNotificationsWithIdentifier. You can cancel the notifications by given identifier. – Alyshaalysia

@Alyshaalysia can u write that as an answer ? i'll give u the correct answer – Kathrynekathy

Possible duplicate of Delete a particular local notification – Electrotherapy

Answer 1

You can cancel or remove notifications by calling:

let center = UNUserNotificationCenter.current()

Remove pending notifications with given identifier

center.removePendingNotificationRequests(withIdentifiers: [“givenIdentifier”])

And remove delivered notifications with given identifier

center.removeDeliveredNotifications(withIdentifiers: [“givenIdentifier”])

Alyshaalysia

Answer 2

To build on top of Mannopson's answer:

This removes all pending Notifications (Swift 5)

func cancelNotifications() -> Void {
    UNUserNotificationCenter.current().removeAllPendingNotificationRequests()
}

Detraction