firesOnce
An option that instructs CloudKit to send a push notification only once.
Declaration
static var firesOnce: CKQuerySubscription.Options { get }Discussion
You combine this option with one or more of the other subscription options. This option applies only to query-based subscriptions. CloudKit deletes the subscription after it sends the push notification. If you want to generate subsequent push notifications using the same criteria, create and save a new subscription.