Как получить массив временных интервалов 30 минут между двумя датами

Question

Например:- startDate:- 20-08-2018 10:00 AM endDate:- 20-08-2018 14:30

Выходные данные:- ["10:00 AM", "10:30 AM", "11:00 AM", "11:30 AM", "12:00PM", "12:30 PM", "13:00 PM" "," 01:30 PM "," 14:00 PM "," 02:30 PM "]

var fromTime: Date = getFromTime fromTime = fromTime.addingTimeInterval (-1800)

    guard let toTime:Date  = timeFormat.date(from:endTime) else {
        return nil
    }

    var dateByAddingThirtyMinute : Date!
    let timeinterval : TimeInterval = toTime.timeIntervalSince(fromTime)
    let numberOfIntervals : Double = timeinterval / 3600;

    var timeArrayAM = [String]()
    var timeArrayPM = [String]()

    for _ in stride(from: 0, to: Int(numberOfIntervals * 2), by: 1) {

        dateByAddingThirtyMinute = fromTime.addingTimeInterval(1800)
        fromTime = dateByAddingThirtyMinute

        if let dateString = dateByAddingThirtyMinute.format(with: "hh:mm a") as? String {

            // print("Time after 30 min = \(dateString)")

            if temp == 0 {

                let time = dateString
                guard let getStopTime = timeFormat.date(from: time) else {

                    return nil
                }

                var stopTime = getStopTime

                var date = Date()
                date = date.addingTimeInterval(TimeInterval(advanceTimeInterval*60))
                let calendar = Calendar.current

                let year = calendar.component(.year, from: date)
                let month = calendar.component(.month, from: date)
                let day = calendar.component(.day, from: date)
                let hour = calendar.component(.hour, from: stopTime)
                let minute = calendar.component(.minute, from: stopTime)

                stopTime = calendar.date(bySetting: .year, value: year, of: stopTime)!
                stopTime = calendar.date(bySetting: .month, value: month, of: stopTime)!
                stopTime = calendar.date(bySetting: .day, value: day, of: stopTime)!
                stopTime = calendar.date(bySetting: .hour, value: hour, of: stopTime)!
                stopTime = calendar.date(bySetting: .minute, value: minute, of: stopTime)!

                let timeDifference = calendar.dateComponents([.hour, .minute], from: stopTime, to: date)

                // print_debug("************************************")
                // print(timeDifference.hour, timeDifference.minute)
                if timeDifference.hour! < 0 || timeDifference.minute! < 0 || (timeDifference.hour! == 0 && timeDifference.minute! == 0 ) {
                    showFirstTime = dateString
                    temp = 1
                }
                // print_debug("************************************")
            }

Answer 1

Вы можете сделать это,

var array: [String] = []

let formatter = DateFormatter()
formatter.dateFormat = "dd-MM-yyyy hh:mm a"

let formatter2 = DateFormatter()
formatter2.dateFormat = "hh:mm a"

let startDate = "20-08-2018 10:00 AM"
let endDate = "20-08-2018 02:30 PM"

let date1 = formatter.date(from: startDate)
let date2 = formatter.date(from: endDate)

var i = 1
while true {
    let date = date1?.addingTimeInterval(TimeInterval(i*30*60))
    let string = formatter2.string(from: date!)

    if date! >= date2! {
        break;
    }

    i += 1
    array.append(string)
}
print(array)

Выход выше, есть,

["10:30 AM", "11:00 AM", "11:30 AM", "12:00 PM", "12:30 PM", "01:00 PM", "01:30 PM", "02:00 PM", "02:30 PM"]

Answer 2

Получите 30-минутный интервал между двумя свиданиями.

переопределить функцию viewDidLoad() {

        super.viewDidLoad()

        // Do any additional setup after loading the view.
        setTimeArray()
    }
func setTimeArray(){
        var array: [String] = []
        let formatter = DateFormatter()
        formatter.dateFormat = "dd-MM-yyyy HH:mm"
        let formatter2 = DateFormatter()
        formatter2.dateFormat = "hh:mm a"
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "dd-MM-yyyy"
        let dt = Date()
        let nxtDt = dt.getNextDate()
        let Curdate = dt.DateToString(Formatter: "dd-MM-yyyy")
        let Nxtdate = nxtDt.DateToString(Formatter: "dd-MM-yyyy")
        let startDate = "\(Curdate) 10:00"
        let endDate = "\(Nxtdate) 00:00"

        let date1 = formatter.date(from: startDate)
        let date2 = formatter.date(from: endDate)
        let interval = 30
        let string = formatter2.string(from: date1!)
        array.append(string)
        var i = 1
        while true {
            let date = date1?.addingTimeInterval(TimeInterval(i*interval!*60))
            let string = formatter2.string(from: date!)

            if date! >= date2! {
                break;
            }

            i += 1
            array.append(string)
        }
    }

Выход:

["10:00 AM", "10:30 AM", "11:00 AM", "11:30 AM", "12:00 PM", "12:30 PM", "01:00 PM", "01:30 PM", "02:00 PM", "02:30 PM", "03:00 PM", "03:30 PM", "04:00 PM", "04:30 PM", "05:00 PM", "05:30 PM", "06:00 PM", "06:30 PM", "07:00 PM", "07:30 PM", "08:00 PM", "08:30 PM", "09:00 PM", "09:30 PM", "10:00 PM", "10:30 PM", "11:00 PM", "11:30 PM"]