How do I find the number of days in given month and year using swift

Question

I want to find the total number days on given month and year. Example: I want to find total number of days on year = 2015, month = 7

Answer 1

In order to get number of days and all the dates on given month and year, try this.

func getAllDates(month: Int, year: Int) -> [Date] {
    let dateComponents = DateComponents(year: year, month: month)
    let calendar = Calendar.current
    let date = calendar.date(from: dateComponents)!

    let range = calendar.range(of: .day, in: .month, for: date)!
    let numDays = range.count
    let formatter = DateFormatter()
    formatter.dateFormat = "yyyy MM dd"
    formatter.timeZone = TimeZone(abbreviation: "GMT+0:00")
    var arrDates = [Date]()
    for day in 1...numDays {
        let dateString = "\(year) \(month) \(day)"
        if let date = formatter.date(from: dateString) {
            arrDates.append(date)
        }
    }

    return arrDates
}

Usage:

let arrDatesInGivenMonthYear = getAllDates(month: 1, year: 2018)
debugPrint(arrDatesInGivenMonthYear)
//Output: [2018-01-01 00:00:00 +0000, 2018-01-02 00:00:00 +0000, ... , 2018-01-31 00:00:00 +0000]

let numberOfDays = arrDatesInGivenMonthYear.count
debugPrint(numberOfDays)
//Output: 31