swift-calendar-manager.swift

struct CalendarRange {
	let month: Int
	let year: Int
	let daysInMonth: Int
}

static func getCalendarRange(withStartDate startDate: Date, withEndDate endDate: Date) -> [CalendarRange] {

	let months = Calendar.current.dateComponents([.month], from: startDate, to: endDate).month ?? 1

	var result: [CalendarRange] = []
	for d in 0...months {
		let dateToAdd = Calendar.current.date(byAdding: .month, value: (d * -1), to: endDate)!
		let components = Calendar.current.dateComponents([.month, .year], from: dateToAdd)

		var days: Int
		if d == 0 {
			days = CalendarManager.getDay(for: endDate)
		} else {
			days = CalendarManager.getDaysInMonth(for: dateToAdd)
		}

		result.append(CalendarRange(month: components.month!, year: components.year!, daysInMonth: days))
	}

	return result
}