subscribe.swift

func subscribe() {
    let subscription = CKSubscription(recordType: "Item", predicate: NSPredicate(value: true), subscriptionID: "items", options: .FiresOnRecordUpdate | .FiresOnRecordCreation)
    subscription.notificationInfo = CKNotificationInfo()
    subscription.notificationInfo.alertBody = "New item added"
    self.db.saveSubscription(subscription) { (subscription, error) -> Void in
        if error != nil {
            println(error.localizedDescription)
        }
    }
}