获取默认日历时出错，仅第一次出现，但此后效果很好

Question

I have written a code to create an event. Code is pretty straight forward :

    let eventStore : EKEventStore = EKEventStore()
    eventStore.requestAccess(to: .event, completion: {
            granted, error in
            if (granted) && (error == nil) {
                print("granted \(granted)")
                print("error  \(String(describing: error))")

            let event:EKEvent = EKEvent(eventStore: eventStore)
            event.title = title
            event.startDate = startDate
            event.endDate = endDate
            event.notes = "Lecture"
            event.calendar = eventStore.defaultCalendarForNewEvents
            //                eventStore.saveEvent(event, span: EKSpanThisEvent, error: nil)
            guard ((try? eventStore.save(event, span: EKSpan.thisEvent, commit: true)) != nil)else{
                print("error  saving event")
                completion(false)
                return
            }
            print("Saved Event")
        }}

When the code runs first time it gives this error :

[EventKit] Error getting default calendar for new events: Error Domain=EKCADErrorDomain Code=1019 "(null)" 2018-05-18 00:18:16.586150+0500 SevimFahrschuleMobile[11413:3650672] [EventKit] No object ID provided. Will not find out if the object exists.

But when I run this code again, it works. I am not getting. There is kind of similar question here but the solution there is to get authorization for reminders and then save event, ie

eventStore.requestAccess(to: .reminder) { (<#Bool#>, <#Error?#>) in
        <#code#>
    }

which sounds totally illogical to me.

Let me know if you see any reason for first time failure. Thanks

Answer 1

Add the following in Info.plist :

NSCalendarsUsageDescription
NSRemindersUsageDescription