Swift filter by NSDate object property - ios

Question

I would like to filter my custom objects with a date property.
For example:
class Event
{
let dateFrom: NSDate!
let dateTo: NSDate!
init(dateFrom: NSDate, dateTo: NSDate) {
self.dateFrom = dateFrom
self.dateTo = dateTo
}
}
Now i have a List of maybe 500 Events, and i just want to show the Events for a specific date. I could loop through all Objects, and create a new Array of Objects, but could i also use a filter?
Ill tried something like this:
let specificEvents = eventList.filter( { return $0.dateFrom > date } )
Where date is a NSDate Object for a specific date, but i am not able to use the > operater.
Is there an easy way to get all the events for a specific date, where the date is between the dateFrom and dateTo period?

Answer 1

Thanks to Martin for pointing me into the right direction.
Here is an answer if someone else is looking how to solve this in Swift:
Add an Extension to NSDate:
public func <(a: NSDate, b: NSDate) -> Bool {
return a.compare(b) == NSComparisonResult.OrderedAscending
}
public func ==(a: NSDate, b: NSDate) -> Bool {
return a.compare(b) == NSComparisonResult.OrderedSame
}
extension NSDate: Comparable { }
So you are able to use the < and > operator for NSDate comparison.
var date = dateFormatter.dateFromString(dateString)
var dateTomorrow = date?.dateByAddingTimeInterval(NSTimeInterval(60*60*24)) // add one Day
eventsToday = allEvents.filter( { return $0.dateFrom >= date && $0.dateTo < dateTomorrow} )

Answer 2

For Swift 3.x update :-
extension Date: Comparable{
public static func <(a: Date, b: Date) -> Bool{
return a.compare(b) == ComparisonResult.orderedAscending
}
static public func ==(a: Date, b: Date) -> Bool {
return a.compare(b) == ComparisonResult.orderedSame
}
}