Yeartext1，Monthtext1和Monthtext1是UITextField

Yeartext1 , Monthtext1 and Monthtext1 are UITextField

可生成的是UILabel

resultlable is UILabel

    let dateFormatter = NSDateFormatter()

    dateFormatter.dateFormat = "dd-MM-yyyy"

    let GregorianDate = dateFormatter.dateFromString("\(Daytext1.text!)-\(Monthtext1.text!)-\(Yeartext1.text!)")

    let islamic = NSCalendar(identifier: NSCalendarIdentifierIslamicUmmAlQura)

    let components = islamic?.components(NSCalendarUnit(rawValue: UInt.max), fromDate: GregorianDate!)

    resultlable.text = "\(components!.year) - \(components!.month) - \(components!.day)"

它需要一个公历2015年5月10日，并且会给您伊斯兰日期1436年12月22日

It will take an Gregorian Date 5-10-2015 and it will give you the islamic date 1436 - 12 - 22

*一天出错的可能性很小

*There is a small probability of one day error

您可以检查此转换器 http://www.islamicfinder.org/Hcal/hdate_next.php

you can check this converter http://www.islamicfinder.org/Hcal/hdate_next.php