Silent push notifications in iOS 11 ignored.

2
votes

if I try to send a push notification silent (no badge/sound/alert) and just content-available, as per specs for silent notifications, on iOS 11, the notification is ignored and not forwarded to the app.

This is the notification

{
    "aps" : {
        "content-available" : 1,
    }, 
    "type" : "0"
}

The device log has:

<Error>: Ignoring notification with no alert, sound or badge (it.my.app.dev): C146-3838

And more complete:

Dec 27 10:11:30 iPierX SpringBoard(UserNotificationsServer)[59] <Notice>: [it.my.app.dev] Received remote notification request C146-3838 [ hasAlertContent: 0, hasSound: 0 hasBadge: 0 hasContentAvailable: 1 hasMutableContent: 0 ]
Dec 27 10:11:30 iPierX SpringBoard(UserNotificationsServer)[59] <Notice>: [it.my.app.dev] Deliver push notification request C146-3838
Dec 27 10:11:30 iPierX SpringBoard(UserNotificationsServer)[59] <Notice>: [it.my.app.dev] Passing content-available push to Duet
Dec 27 10:11:30 iPierX SpringBoard(DuetActivityScheduler)[59] <Notice>: SUBMITTING: <private>
Dec 27 10:11:30 iPierX SpringBoard(UserNotificationsServer)[59] <Error>: Ignoring notification with no alert, sound or badge (it.my.app.dev): C146-3838
Dec 27 10:11:30 iPierX SpringBoard(UserNotificationsServer)[59] <Notice>: [it.my.app.dev] Not saving push notification C146-3838 to store [ error=Error Domain=UNErrorDomain Code=1401 "Notification has no user-facing content" UserInfo={NSLocalizedDescription=Notification has no user-facing content} ]
Dec 27 10:11:30 iPierX dasd(DuetActivitySchedulerDaemon)[1645] <Notice>: Submitted Activity: com.apple.pushLaunch.it.my.app.dev:EA2367 <private>
Dec 27 10:11:30 iPierX dasd(DuetActivitySchedulerDaemon)[1645] <Notice>: Daemon Canceling Activities: {(
    com.apple.pushLaunch.it.my.app.dev:EA2367
)}
Dec 27 10:11:30 iPierX dasd(DuetActivitySchedulerDaemon)[1645] <Notice>: CANCELED: com.apple.pushLaunch.it.my.app.dev:EA2367 <private>
2
iosapple-push-notificationssilent-notification
Please try with at least one key(badge or sound or alert) in push data. In iOS 11 there should be at least one key in dictionary. - Mehul Sojitra
Tried, but different error, same result, and please be aware that the doc is different on Silent Notifications (called Configuring a Background Update Notification) developer.apple.com/library/content/documentation/… - zontar

2 Answers

1
votes

This works also and does not play a sound when it arrives:

{
    aps = {
        "content-available" : 1,
        sound : ""
    };
}
1
votes

Ok.. after a while and chatting with some Apple Engineers and here, I had it working. The key was setting the notification as being High Priority as delivery priority, as well as content-available = 1.

Then of course there are the usual rate limitations for silent push notifications, but overall it works as expected.