Apple Push Notification Collapse Key Equivalent

Question

When using Google push notifications, I am allowed to specify a collapse_key value so a device will not receive multiple notifications of the same collapse_key. Does APNS have a

Answer 1

Doody P's answer works for remote notifications, but there is also an equivalent for locally triggered notifications: when you create your UNNotificationRequest, you can set the identifier parameter to whatever you had been using as a collapse key. After being triggered, the push notification will show only the latest version that you sent with that identifier.

(We send push notifications silently through APNs and then retrigger as local notifications, because we need to make sure that our users are logged in.)

There are handy code examples & demos of managing delivered notifications in this WWDC talk - the key section is from ~18:00 - 21:00.