Returning from a function in a closure - xcode

Question

I need to get an array of events for a certain day in Swift. Because EKEventStore.requestAccessToEntityType is run asynchronously, I am using dispatch_group_notify to wait for the completion handler of EKEventStore.requestAccessToEntityType to complete so I can do something with it then return it. But I can't return from the function inside the closure I pass to dispatch_group_notify because it tries the return from the closure, not the function. Here is my code
class func eventsOn(date: NSDate) -> [Event] {
var events = [Event]()
var ekEvents = [EKEvent]()
var dispatch_group = dispatch_group_create()
dispatch_group_enter(dispatch_group)
Event.eventStore.requestAccessToEntityType(EKEntityTypeEvent, completion: {
gotAccess, error in
let cal = NSCalendar.currentCalendar()
var comps = cal.components(.CalendarUnitYear | .CalendarUnitMonth | .CalendarUnitDay, fromDate: date)
let aFewHoursAgo = NSDateComponents()
aFewHoursAgo.hour = -5
var daStartDate = cal.dateFromComponents(comps)!
daStartDate = cal.dateByAddingComponents(aFewHoursAgo, toDate: daStartDate, options: .allZeros)!
var aDay = NSDateComponents()
aDay.day = 1
var daEndDate = cal.dateByAddingComponents(aDay, toDate: daStartDate, options: .allZeros)!
daEndDate = daEndDate.dateByAddingTimeInterval(-1)!
let p = Event.eventStore.predicateForEventsWithStartDate(daStartDate, endDate: daEndDate, calendars: [Event.eventStore.defaultCalendarForNewEvents])
let tmp = Event.eventStore.eventsMatchingPredicate(p) as [EKEvent]?
if let _ = tmp {
ekEvents = tmp!
}
dispatch_group_leave(dispatch_group)
})
let queue = dispatch_get_global_queue(Int(QOS_CLASS_USER_INITIATED.value), 0)
dispatch_group_notify(dispatch_group, queue) {
println(ekEvents)
let ekEventId = Expression<String>("ekEventId")
let eventId = Expression<Int>("id")
for ekEvent in ekEvents {
let daEventId = Event.db["events"].filter(ekEventId == ekEvent.eventIdentifier).select(eventId).first![eventId]
events.append(Event.eventWithId(daEventId)!)
}
return events
}
}
So where I put return events inside of the block I passed to dispatch_group_notify it tries to return from the closure, but I'd like to return from the function. How can I do this?