How get days name from two days in swift - ios

Question

I have two dates, date1 and date2 and I want days between date1 and date 2
Example:
let date1 = 28-May-2019,
let date2 = 31-May-2019
The expected output
[Tue, Web Thr, Fri]

Answer 1

let date1Str = "28-May-2019"
let date2Str = "31-May-2019"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd-MM-yyyy"
dateFormatter.locale = Locale(identifier: "en_US")
var date1 = dateFormatter.date(from:date1Str)!
var date2 = dateFormatter.date(from:date2Str)!
let dayFormatter = DateFormatter()
dayFormatter.dateFormat = "EEE"
while date1 <= date2 {
let dayInWeek = dayFormatter.string(from: date1)
print(dayInWeek)
date1 = Calendar.current.date(byAdding: .day, value: 1, to: date1)!
}

Answer 2

The following code gives you the days between two dates and should account for trickeries with the calendar.
let calendar = Calendar.current
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd-MMM-yyyy"
let dayFormatter = DateFormatter()
dayFormatter.dateFormat = "EEE"
let dateFrom = dateFormatter.date(from: "28-May-2019")!
let dateTo = dateFormatter.date(from: "31-May-2019")!
var days: [String] = []
var date = dateFrom
while date <= dateTo {
let day = dayFormatter.string(from: date)
days.append(day)
date = calendar.date(byAdding: .day, value: 1, to: date)!
}
print(days)

Answer 3

Try this -
func getWeekdays(dateOne firstDateStr: String, dateTwo secondDateStr: String) -> [String] {
let dateformatter = DateFormatter()
dateformatter.dateFormat = "dd-MMM-yyyy"
guard let firstDate = dateformatter.date(from: firstDateStr),
let secondDate = dateformatter.date(from: secondDateStr) else {
return []
}
let calendar = Calendar.current
let numberOfDays: Int
if firstDate > secondDate {
numberOfDays = (calendar.dateComponents([.day], from: secondDate, to: firstDate).day ?? 0)
} else {
numberOfDays = (calendar.dateComponents([.day], from: firstDate, to: secondDate).day ?? 0)
}
dateformatter.dateFormat = "EEE"
let days = (0...numberOfDays).compactMap { day -> String? in
if let date = calendar.date(byAdding: .day, value: day, to: firstDate) {
return dateformatter.string(from: date)
}
return nil
}
print(days)
return days
}