Number of days between two NSDate objects

Question

I\'m trying to compare two days of NSDate objects, I used at the first time NSDateComponents to calculate difference between my two dates Objects, but it is working correct

Answer 1

For Swift 3:

Expanding from @masa's answer:

extension Calendar {
    func daysWithinEraFromDate(startDate: Date, endDate: Date) -> Int? {
        guard let startDay = ordinality(of: .day, in: .era, for: startDate) else {
            return nil
        }

        guard let endDay = ordinality(of: .day, in: .era, for: endDate) else {
            return nil
        }

        return endDay - startDay
    }
}