Extension of Date to calculate days/seconds between two days.

DateExtension.swift

extension Date {
    
    func daysBetweenDates(start: Date, end: Date) -> Int {
        let days = Calendar.current.dateComponents([.day], from: start, to: end).day!
        let returnDays = days+1
        return returnDays
    }
    
    func secondsBetweenDates(start: Date, end: Date) -> Int {
        let seconds = Calendar.current.dateComponents([.second], from: start, to: end).second!
        return seconds
    }
}