How to Accept/Decline Ekevent Invitation

EKEvent accept invitation

Turns out, after doing some more research, that all of these apps are just displaying the EKEventViewController. What I had mistaken as customization was actually view tints.

How can I display the details of a EKEvent invitation within my app using EKEventViewController?

I finally solved it. It looks like apart from Calendar permission I need also to add into the info.plist Contacts permission.

Privacy - Contacts Usage Description

Is there a way to modify my attendance status using iOS EventKit?

I just used EventKitUI and it works.

EKEvent event.eventIdentifier not removing

I figured it out. Because eventStore.requestAccess(to: .event) is asynchronous, I was saving the event id in the database before the id existed.

So I had to declare the function to accept a completion handler and return the value inside the completion handler.

//// adding events to calendar
func addEventToCalendar(userName: String, userDate: Date, completion: @escaping (String?)->()) {
    
    let userDefaults = UserDefaults.standard
    var eventId = ""
    
    let eventStore: EKEventStore = EKEventStore()
    eventStore.requestAccess(to: .event) { (granted, error) in

        if (granted) && (error == nil) {
            print("granted \(granted)")
            print("error \(String(describing: error))")

            let event: EKEvent = EKEvent(eventStore: eventStore)
            event.title = "\(userName) \(NSLocalizedString("birthday", comment: "birthday"))"
            event.startDate = userDate
            event.endDate = userDate
            event.notes = NSLocalizedString("happyBirthday", comment: "happyBirthday")
            event.isAllDay = true
            event.calendar = eventStore.defaultCalendarForNewEvents
            let ekrules: EKRecurrenceRule = EKRecurrenceRule.init(recurrenceWith: .yearly, interval: 1, end: nil)
            event.recurrenceRules = [ekrules]
            //event.addAlarm(EKAlarm(absoluteDate: event.startDate))
            //sets alert 00:00 on day of event
            event.addAlarm(EKAlarm(relativeOffset: 0))
            
            do {
                
                try eventStore.save(event, span: .futureEvents, commit: true)
                eventId = event.eventIdentifier ?? "no-Id"
                print("Event has been saved with id \(String(describing: eventId))")
                userDefaults.setValue(eventId, forKey: "eventId")
                
            } catch let error as NSError {
                print("error: \(error)")
            }
            completion(eventId)

        } else {
            print("error not granted: \(String(describing: error))")
            completion(nil)
        }
        
    }
    
}

and then use it like so

 addEventToCalendar(userName: uName, userDate: uDate) { (eventIdentifier) in
                
                if let eventId = eventIdentifier {
                    print("Event add birthday id \(eventId)")
                    //// saving data to device
                    
// run on main thread to avoid 'RLMException', reason: 'Realm accessed from incorrect thread.'
                    DispatchQueue.main.async {
                        
                        let newItem = Item()
                        newItem.userImageName = String(describing: self.userImageUrl)
                        newItem.userName = uName
                        newItem.isYearPresent = uYearPresent
                        newItem.userDOB = uDOB
                        newItem.color = UIColor.init(randomFlatColorOf: .dark).hexValue()
                        newItem.daysRemaining = daysRemain
                        newItem.eventId = eventId

                        self.save(item: newItem)
                        
                        // review app
                        self.review()
                    }

EventKit : Is there any way to remove Invitees from EKEventEditViewController

I presume your talking about the displaying of the invitees and repeat options
from EKEventEditViewController?

Having looked at the current API for EKEventEditViewController it doesn't look like there is a way.

However, you could create a custom view controller that replicated the look of the EKEventEditViewController minus the event options you are not interested. You'd need to construct the interface, code the view controller and a delegate interface. It's more effort than using EKEventEditViewController but I can't see you achieving what you want any other way.

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