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

First find the current date...

    let today = Date()
    let gregorian = Calendar(identifier: .gregorian)
    var weekdayComponents: DateComponents? = gregorian.dateComponents([.weekday], from: today)

Sunday = 1, Monday = 2, Tuesday = 3, Wednesday = 4, Thursday = 5, Friday = 6 and Saturday = 7.

    var componentsToSubtract = DateComponents()
    componentsToSubtract.day = (0 - (weekdayComponents?.weekday!)!) + 2

    beginningOfWeek = gregorian.date(byAdding: componentsToSubtract, to: today)

    var componentsToAdd: DateComponents? = gregorian.dateComponents([.day], from: beginningOfWeek!)
    componentsToAdd?.day = 6
    endOfWeek = gregorian.date(byAdding: componentsToAdd!, to: beginningOfWeek!)

    let components: DateComponents? = gregorian.dateComponents([.month], from: beginningOfWeek!)
    let month: Int? = components?.month

    let components1: DateComponents? = gregorian.dateComponents([.month], from: endOfWeek!)
    let month1: Int? = components1?.month

    print("\(month) - \(month1)")

    showDate(start:beginningOfWeek!, end:endOfWeek!, strtMn:month!, endMn:month1!)

func showDate(start:Date, end:Date, strtMn:Int, endMn:Int) {
    if strtMn == endMn{
        let formatter = DateFormatter()
        formatter.dateFormat = "MMM dd"
        let stringFromDate: String = formatter.string(from: start)

        let formatter1 = DateFormatter()
        formatter1.dateFormat = "dd"
        let stringFromDate1: String = formatter1.string(from: end)
        print("\(stringFromDate) - \(stringFromDate1)")
        lblDate.text = "\(stringFromDate) - \(stringFromDate1)"
    }
    else{
        let formatter = DateFormatter()
        formatter.dateFormat = "MMM dd"
        let stringFromDate: String = formatter.string(from: start)

        let formatter1 = DateFormatter()
        formatter1.dateFormat = "MMM dd"
        let stringFromDate1: String = formatter1.string(from: end)
        print("\(stringFromDate) - \(stringFromDate1)")
        lblDate.text = "\(stringFromDate) - \(stringFromDate1)"
    }
}

for next and previous ....

@IBAction func week_CalendarActionEvents(_ sender: UIButton) {

    let gregorian = Calendar(identifier: .gregorian)
    var offsetComponents = DateComponents()
    var nextStrtDate: Date?
    var nextEndDate: Date?
    var startDate: Date?
    var endDate: Date?

    startDate = beginningOfWeek
    endDate = endOfWeek

    if sender.tag == 1 {
        offsetComponents.day = -7
    }
    else if sender.tag == 2 {
        offsetComponents.day = 7
    }

    nextStrtDate = gregorian.date(byAdding: offsetComponents, to:startDate!)
    startDate = nextStrtDate
    beginningOfWeek = startDate

    nextEndDate = gregorian.date(byAdding: offsetComponents, to: endDate!)
    endDate = nextEndDate
    endOfWeek = endDate

    let components: DateComponents? = gregorian.dateComponents([.month], from: startDate!)
    let month: Int? = components?.month

    let components1: DateComponents? = gregorian.dateComponents([.month], from: endDate!)
    let month1: Int? = components1?.month

    print("\(month)- \(month1)")

    showDate(start:startDate!, end:endDate!, strtMn:month!, endMn:month1!)
}

Answer 2

//Begining of Week Date

- (NSDate*) beginingOfWeekOfDate{

    NSCalendar *tmpCalendar = [NSCalendar currentCalendar];
    NSDateComponents *components = [tmpCalendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitWeekOfYear|NSCalendarUnitWeekday fromDate:self];//get the required calendar units

    NSInteger weekday = tmpCalendar.firstWeekday;  
    components.weekday = weekday; //weekday
    components.hour = 0;
    components.minute = 0;
    components.second = 0;

    NSDate *fireDate = [tmpCalendar dateFromComponents:components];

    return fireDate;
}

//End of Week Date

-(NSDate *)endOfWeekFromDate{

    NSCalendar *tmpCalendar = [NSCalendar currentCalendar];
    NSDateComponents *components = [tmpCalendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitWeekOfYear|NSCalendarUnitWeekday fromDate:self];//get the required calendar units

    int weekday = 7; //Saturday
    if (tmpCalendar.firstWeekday != 1) {
        weekday = 1;
    }
    components.weekday = weekday;//weekday
    components.hour = 23;
    components.minute = 59;
    components.second = 59;

    NSDate *fireDate = [tmpCalendar dateFromComponents:components];

    return fireDate;
}

Answer 3

A Swift version

of vikingosegundo's answer:

let calendar = NSCalendar.currentCalendar()
var startOfTheWeek: NSDate?
var endOfWeek: NSDate!
var interval = NSTimeInterval(0)

calendar.rangeOfUnit(.WeekOfMonth, startDate: &startOfTheWeek, interval: &interval, forDate: NSDate())
endOfWeek = startOfTheWeek!.dateByAddingTimeInterval(interval - 1)

Answer 4

Here is a solution for the swift4, we can get all the days for the current week.

var calendar = Calendar(identifier: Calendar.Identifier.gregorian)
let today = calendar.startOfDay(for: Date())    
let dayOfWeek = calendar.component(.weekday, from: today) - calendar.firstWeekday
let weekdays = calendar.range(of: .weekday, in: .weekOfYear, for: today)!
let days = (weekdays.lowerBound ..< weekdays.upperBound)
                    .flatMap { calendar.date(byAdding: .day, value: $0 - dayOfWeek, to: today) }

Answer 5

Swift 4.2

If you want to show the current week dates, here is the code.

  override func viewDidLoad() {
        super.viewDidLoad()

        for dateIndex in 0..<7 {
            guard let startWeek = Date().startOfWeek else { return }
            let date = Calendar.current.date(byAdding: .day, value: dateIndex + 1, to: startWeek)
            print(date)
        }

}



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)
    }
}

Answer 6

Here is Swift 3 Version:-

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)
    }
}

You can get the week start date and end date like this :

let startWeek = Date().startOfWeek
let endWeek = Date().endOfWeek

print(startWeek ?? "not found start date")
print(endWeek ?? "not found end date")