Device Activity Monitor in iOS doesn't work correctly

Question

I have faced a problem with Screen Time API in iOS. I have successfully authorised using AuthorizationCenter.shared.requestAuthorization, I have checked status using AuthorizationCenter.shared.authorizationStatus, but the problem is with DeviceActivityCenter.

In my ViewModel I have a function, that I'm calling after checking Authorisation Status:

func startMonitoringAccordingSchedule() {
        let schedule = DeviceActivitySchedule(intervalStart: DateComponents(hour: 0, minute: 0), intervalEnd: DateComponents(hour: 23, minute: 59), repeats: true)

        let center = DeviceActivityCenter()
        do {
            try center.startMonitoring(.daily, during: schedule)
            print(" Success with Starting Monitor Activity")
        } catch {
            print(" Error with Starting Monitor Activity: \(error.localizedDescription)")
        }
        
    }

The problem is that with Succeed Authorisation, with Status = Approved, this function doesn't work, try center.startMonitoring(.daily, during: schedule) fails and it goes to the catch block.

Can anybody help me with that?

score 0 · Answer 1 · answered Jan 25 '22 at 10:57

I found solution occasionally! The problem with try center.startMonitoring(.daily, during: schedule) is that it can work only after selecting apps to block. If you try to start monitoring before you select apps - it won't work. At least this is what I found.

score 0 · Answer 2 · answered Feb 07 '23 at 19:00

0

You need to tell the DeviceActivityCenter() on which day - Try:

DateComponents(hour: startHour, minute: startMinutes, weekday: day)

answered Feb 07 '23 at 19:00

Boaz Frenkel

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I did not add the weekDay component. It works fine most of the time but I am not getting the interval end callback sometimes. Will the missing weekDay component be a reason for it ? – Akilan C B Mar 14 '23 at 06:48
@AkilanCB Yes, maybe. Try setting the day. What is the error you see when not setting the day? And after setting the day do you still get an error? – Boaz Frenkel Mar 14 '23 at 08:04
I'm not getting errors. I am able to register schedule without weekDay and it works fine most of the time. But I have noticed that in some case, the intervalDidEnd is not called as expected on the schedule end. – Akilan C B Mar 14 '23 at 10:55
For me, when I set it with the day component this works @AkilanCB And the question said: " The problem is that with Succeed Authorisation, with Status = Approved, this function doesn't work, try center.startMonitoring(.daily, during: schedule) fails and it goes to the catch block. " So he is getting an error – Boaz Frenkel Mar 16 '23 at 13:06

Device Activity Monitor in iOS doesn't work correctly

2 Answers2