Current Week Start and End Date

Question

I want to get the current week start and end date and I also want to use the previous week start and end date and next week of the start and end date in current month.

Answer 1

Swift 3+: Simple solution with extension

extension Date {
    var startOfWeek: Date? {
        let gregorian = Calendar(identifier: .gregorian)
        guard let sunday = gregorian.date(from: gregorian.dateComponents([.yearForWeekOfYear, .weekOfYear], from: self)) else { return nil }
        return gregorian.date(byAdding: .day, value: 1, to: sunday)
    }

    var endOfWeek: Date? {
        let gregorian = Calendar(identifier: .gregorian)
        guard let sunday = gregorian.date(from: gregorian.dateComponents([.yearForWeekOfYear, .weekOfYear], from: self)) else { return nil }
        return gregorian.date(byAdding: .day, value: 7, to: sunday)
    }

    var yesterdayDate: Date? {
        return NSCalendar.current.date(byAdding: .day, value: -1, to: noon)!
    }

    var tommorowDate: Date? {
        return NSCalendar.current.date(byAdding: .day, value: 1, to: noon)!
    }

    var previousDate: Date? {
        let oneDay:Double = 60 * 60 * 24
        return self.addingTimeInterval(-(Double(oneDay)))
    }

    var nextDate: Date? {
        let oneDay:Double = 60 * 60 * 24
        return self.addingTimeInterval(oneDay)
    }

    var noon: Date {
        return NSCalendar.current.date(bySettingHour: 12, minute: 0, second: 0, of: self)!
    }

    var month: Int {
        return Calendar.current.component(.month,  from: self)
    }
}