iphone - Monotouch EventKit-无法检索EventIdentifier

我正在使用在这里找到的示例:http://docs.xamarin.com/guides/ios/platform_features/introduction_to_eventkit#4.3.creating-an-event-programmatically

我问Xamarin，他们说我应该使用EventIdentifier而不是CalendarItemIdentifier-但是，当您按照他们说的方式(startDate，endDate和Calendar)查找事件时

日历项目没有EventIdentifier属性，而且我不确定如何将其强制转换或应该在该处执行的操作。

这是我正在做的基本示例。问题是，当我去通过标识符查找事件时，该事件不存在，因为它是CalendarItemIdentifier而不是EventIdentifier

public string CreateDefaultEvent ()
        {
            // Creating an event for demonstration purposes
            // This is the sample code from your website to create an event programmatically
            EKEvent newEvent = EKEvent.FromStore ( Application.AppEventStore );
            // set the alarm for 10 minutes from now
            newEvent.AddAlarm ( EKAlarm.FromDate ( DateTime.Now.AddMinutes ( 10 ) ) );
            // make the event start 20 minutes from now and last 30 minutes
            newEvent.StartDate = DateTime.Now.AddMinutes ( 20 );
            newEvent.EndDate = DateTime.Now.AddMinutes ( 50 );
            newEvent.Title = "Get outside and do some exercise!";
            newEvent.Notes = "This is your motivational event to go and do 30 minutes of exercise. Super important. Do this.";
            newEvent.Calendar = Application.AppEventStore.DefaultCalendarForNewEvents;

            NSError e;
            Application.AppEventStore.SaveEvent ( newEvent, EKSpan.ThisEvent, out e );
            Console.WriteLine ("Event Saved, ID: " + newEvent.CalendarItemIdentifier);
            return newEvent.CalendarItemIdentifier;
        }

        public string RetrieveCreatedEvent (string _eventIdentifier)
        {
            // We will just return the event's notes to see if we got a valid event
            EKEvent savedEvent = Application.AppEventStore.EventFromIdentifier (_eventIdentifier);
            return savedEvent.Notes;
        }

提前致谢!

最佳答案

当您去参加 Activity 时，您必须这样做:

NSPredicate query = Util.MyEventStore.PredicateForEvents (Util.DateTimeToNSDate(startDate), Util.DateTimeToNSDate(endDate), null);
//EKCalendarItem[] eventArrary = Util.MyEventStore.EventsMatching (query);
EKEvent[] eventArrary = Util.MyEventStore.EventsMatching (query);

我不知道为什么我最初将其转换为EKCalendarItem[]，但是，您必须使用EKEvent

关于iphone - Monotouch EventKit-无法检索EventIdentifier，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/15696959/