Xamarin iOS EventStore.Getcalendars returning 0 - ios

Question

I am having an issue where either the reminder calendar or event calendar, depending on which displays the popup first, creates multiple calendars and does not save any of the events/reminders. I have the properties set in the plist. Below is the code I am using to request access for the events and reminders:
var calendarEvent = await ANApi.FetchCalendarInfoAsync(AppCore.CurrentAppInfo.AppId);
calendarEvent.Count();
foreach (var calEvent in calendarEvent.ToList())
{
if (calEvent.Type == 1)
{
AppEvent.Current.EventStore.RequestAccess(EKEntityType.Event, (bool granted, NSError err) =>
{
if (granted)
{
lock (_lock)
{
CreateCalendar(EKEntityType.Event);
CreateEvent(calEvent);
}
}
});
}
else
{
AppEvent.Current.EventStore.RequestAccess(EKEntityType.Reminder, (bool remGranted, NSError remErr) =>
{
if (remGranted)
{
lock (_lock)
{
CreateCalendar(EKEntityType.Reminder);
CreateReminder(calEvent);
}
}
});
}
}
The code works fine if I am only receiving events or reminders, but since I am receiving both events and reminders, it is failing to create my calendars properly.
This is how I am creating the calendars:
public void CreateCalendar(EKEntityType type)
{
bool calExists = false;
var appName = NSBundle.MainBundle.ObjectForInfoDictionary("CFBundleDisplayName");
//This returns 0 calendars, depending on which event's request was displayed first.
EKCalendar[] calendars = AppEvent.Current.EventStore.GetCalendars(type);
foreach (EKCalendar cal in calendars)
{
if (type == EKEntityType.Event)
{
if (PersistentLayer.Instance.GetString(Constant.CALENDAR_ID) == null)
calExists = false;
else if (cal.CalendarIdentifier == PersistentLayer.Instance.GetString(Constant.CALENDAR_ID))
calExists = true;
}
else
{
if (PersistentLayer.Instance.GetString(Constant.REMINDER_CALENDAR_ID) == null)
calExists = false;
else if (cal.CalendarIdentifier == PersistentLayer.Instance.GetString(Constant.REMINDER_CALENDAR_ID))
calExists = true;
}
}
//Create a Calendar based on the App's name. If name cannot be found use App Calendar
if (!calExists)
{
EKCalendar calendar = EKCalendar.Create(type, AppEvent.Current.EventStore);
if (appName != null)
calendar.Title = appName.ToString();
else
calendar.Title = "App";
EKSource localSource = null;
foreach (EKSource source in AppEvent.Current.EventStore.Sources)
{
if (source.SourceType == EKSourceType.CalDav)
{
localSource = source;
break;
}
}
if (localSource == null)
return;
calendar.Source = localSource;
calendar.CGColor = new CGColor(255, 255, 0);
NSError calError;
AppEvent.Current.EventStore.SaveCalendar(calendar, true, out calError);
if (calError != null)
{
this.SimpleAlert("Error saving Calender", calError.ToString(), "OK", null);
return;
}
//Store the calendar Id so we can use it when saving events
if (type == EKEntityType.Event)
PersistentLayer.Instance.Edit().PutString(Constant.CALENDAR_ID, calendar.CalendarIdentifier);
else
PersistentLayer.Instance.Edit().PutString(Constant.REMINDER_CALENDAR_ID, calendar.CalendarIdentifier);
}
}
I believe that there is some sort of race condition going on, but I have not been able to figure it out. I tried multiple things to try and get it to work, but I have not had any success.
Thanks

Answer 1

I ended up figuring it out. First, I broke the code up and created all the reminders received followed by the events.
At first, this gave me a Error Domain=EKCADErrorDomain Code=1010 when trying to create the events. The way I solved this was to reset the event store. Once I did this, the Calendars created properly, for both reminders and events, and both events and reminders were added to their respective calendars.