在NotificationService中从didReceive禁用接收推送

Question

I want to disable send push notification to user under special conditions. I saved my first Push in userDefault and in the second I check if it's the same. when i debug it enter to return and not continue, but still i get a push notification. the push sent from firebase api

 override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) {

    if let dict = request.content.userInfo["aps"] as? Dictionary<AnyHashable, AnyHashable> {
        if let did = dict["did"] as? String {
            if let message = dict["message"] as? String {
                let currentPush = did + "_" + message

                if let lastPush = UserDefaults.standard.string(forKey: "lastPush"), currentPush == lastPush {
                    print("enter")
                    return
                }
                else {
                    UserDefaults.standard.setValue(currentPush, forKey: "lastPush")
                }
            }
        }
    }}

Answer 1

Unlike Android where the developer has some control whether to show the notification or not, iOS does not provide that facility. A notification sent will always be shown. So, your return won't work.

One work around that you can do is send a silent push notification , process the data and if it fits your logic, then create a local notification and show that.