iOS 10.0 * Handle Push notification in foreground

Question

If i implement the method to present push notification in ios 10.0

@available(iOS 10.0, *)

    func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void)
    {
        completionHandler(UNNotificationPresentationOptions.alert)

    }

then it present all the notification , So, my question is how can i prevent to show particular push notification like (login at another deveice ) i just handle code for that particular push only

see this for example https://stackoverflow.com/questions/39382852/didreceiveremotenotification-not-called-ios-10/39383027#39383027 — Anbu.Karthik, Jul 13 '17 at 09:22

Jaydeep Vyas · Accepted Answer · 2017-07-13T10:04:40.613

My push data is

{
    "aps" : {
        "alert" : {
            "id" : 2091
        },
        "sound" : "chime.aiff"
    },
    "acme" : "foo"
}

I have used id because i can separate each push by its id, and based on id i can decide weather to show notification in foreground or not..

Thanks @Anbu.Karthik For reference as per my question we can handle push even user did't tap on notification in

   @available(iOS 10.0, *)

    func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void)
    {
        print("Handle push from foreground")
        let userInfo:[AnyHashable:Any] =  notification.request.content.userInfo
        let aps:NSDictionary = (userInfo[AnyHashable("aps")] as? NSDictionary)!
        let alert:NSDictionary = (aps["alert"] as? NSDictionary)!
        let id = Int(alert["id"] as! Int)
        if id == your id
        {    
         //Handle push without prompting alert 
        }

        else
        {
          //Display alert
         completionHandler(UNNotificationPresentationOptions.alert)
        }
    }

And When user tap on notification Following method is called...

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any]) {

        print(userInfo)


    }

score 0 · Answer 2 · answered Jul 13 '17 at 09:48

As per the official documentation:

// The method will be called on the delegate only if the application is in the foreground. If the method is not implemented or the handler is not called in a timely manner then the notification will not be presented. The application can choose to have the notification presented as a sound, badge, alert and/or in the notification list. This decision should be based on whether the information in the notification is otherwise visible to the user.

- (void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler __IOS_AVAILABLE(10.0) __TVOS_AVAILABLE(10.0) __WATCHOS_AVAILABLE(3.0);

So to answer your question, if you want to prevent the notification from being shown, either do not implement this method or do not call the handler.

Hope it helps.

my question is about when app is in foreground, And i want to prevent particular notification not all — Jaydeep Vyas, Jul 13 '17 at 10:08
In that case, you can check the notification payload and then do not call the handler if you want to hide a particular notification. — atulkhatri, Jul 13 '17 at 11:02

iOS 10.0 * Handle Push notification in foreground

2 Answers2