EKEvent event.eventIdentifier 未删除

Question

我正在尝试删除我在日历中保存的带有事件 ID 的事件，但它会删除另一个事件，有时它不会删除任何内容。

我在创建事件时将 eventId 保存在领域数据库中，并在我想删除但它不起作用时读取它。

我尝试在实际设备上运行它，使用数组而不是字典，将跨度更改为.futureEvents，但仍然不起作用

我用于创建事件并保存到领域数据库的代码

/// function exits in another class
func addEventToCalendar(userName: String, userDate: Date) {

    let userDefaults = UserDefaults.standard

    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) Birthday"
            event.startDate = userDate
            event.endDate = userDate
            event.notes = "Happy Birthday!"
            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: .thisEvent, commit: true)

            } catch let error as NSError {
                print("error: \(error)")
            }
            let eventId = event.eventIdentifier ?? "nil-id"

            userDefaults.setValue(eventId, forKey: "eventId")
            print(eventId)

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

//saving it in a view controller class
@IBAction func okBtnPressed(_ sender: UIButton) {

let eventId = UserDefaults.standard.string(forKey: "eventId") ?? "no-id"

            //// saving data to device
            let newItem = Item()
            newItem.userImageName = String(describing: 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)
}

事件ID成功保存在领域数据库中。

从日历中删除事件的功能

func removeEvent(id: String) {
    let store = EKEventStore()

    store.requestAccess(to: .event) { (granted, error) in
        if !granted { return }
        // checking if event exists
        if let eventToRemove = store.event(withIdentifier: id) {
            do {
                print("removing: \(id)")
                try store.remove(eventToRemove, span: .thisEvent, commit: true)
                print("event removed sucessfully")
            } catch let error as NSError {
                print("error: \(error)")
            }

        } else {
            print("event doesnt exist.")
        }

    }
}

这就是我删除它的方法

var eventIDS = [Int: String]()

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
// inserting evenIds to dictionary to access it in remove function
// I used an array but it gave me the same problem
if let item = itemsObject?[indexPath.row] {
    eventIDS[indexPath.row] = item.eventId
}

}
// then I call remove function when swipe taps on cell
removeEvent(id: self.eventIDS[indexPath.row] ?? "")

有时我会成功删除事件，但它会删除不同的 事件，有时我会收到以下错误

Error getting event with identifier 2BD633CA-BBEA-47CD-8410-40BCE6362A5C:98D9EAF2-D5EF-420F-B769-7F02B7795E54: Error Domain=EKCADErrorDomain Code=1010 "(null)"
event doesnt exist.

Answer 1

我想通了。因为eventStore.requestAccess(to: .event) 是异步的，所以我在id 存在之前将事件id 保存在数据库中。

所以我必须声明函数以接受完成处理程序并在完成处理程序内返回值。

//// 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)
        }
        
    }
    
}

然后像这样使用它

 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()
                    }