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有人能帮助我吗

我正在尝试使用 Swift 语言创建一个 IOS 应用程序，我需要使用回历（伊斯兰）日历

我尝试了很多次但我失败了:(

这是我的尝试

    let datenow = NSDate()
    let calendar = NSCalendar.currentCalendar()
    let components = calendar.components(NSCalendarUnit(UInt.max), fromDate: datenow)

    var gregorian = NSCalendar(identifier:NSIslamicCivilCalendar)
    var date = gregorian.dateFromComponents(components)

    println(date)

并且输出错误

   2576-04-25 09:05:08 +0000

我们在回历中是 1434 年而不是 2576 年！

4

5 回答 5

13

您正在混淆日历、日期和组件：

let datenow = NSDate() 
    // This is a point in time, independent of calendars
let calendar = NSCalendar.currentCalendar() 
    // System calendar, likely Gregorian 
let components = calendar.components(NSCalendarUnit(UInt.max), fromDate: datenow) 
    // Gregorian components

println("\(components.year)") // "2014"

var islamic = NSCalendar(identifier:NSIslamicCivilCalendar)! // Changed the variable name 
    // *** Note also NSCalendar(identifier:) now returns now returns an optional ***
var date = islamic.dateFromComponents(components) 
    // so you have asked to initialise the date as AH 2014

println(date) 
    // This is a point in time again, sometime in AH 2014, or AD 2576

您需要做的只是：

let datenow = NSDate()
let islamic = NSCalendar(identifier:NSIslamicCivilCalendar)!
let components = islamic.components(NSCalendarUnit(UInt.max), fromDate: datenow)
println("Date in system calendar:\(datenow), in Hijri:\(components.year)-\(components.month)-\(components.day)")
   //"Date in system calendar:2014-09-25 09:53:00 +0000, in Hijri:1435-11-30"

要获取格式化的字符串，而不仅仅是整数组件，您需要使用NSDateFormatter，这将允许您指定日历和日期以及格式。见这里。

更新

要根据要求将数字简单地音译为（东方）阿拉伯数字（因为 0...9 被称为（西方）阿拉伯数字以将它们与罗马数字区分开来），您可以使用：

let sWesternArabic = "\(components.day)-\(components.month)-\(components.year)"
let substituteEasternArabic = ["0":"٠", "1":"١", "2":"٢", "3":"٣", "4":"٤", "5":"٥", "6":"٦", "7":"٧", "8":"٨", "9":"٩"]
var sEasternArabic =  ""
for i in sWesternArabic {
    if let subs = substituteEasternArabic[String(i)] { // String(i) needed as i is a character
        sEasternArabic += subs
    } else {
        sEasternArabic += String(i)
    }
}

println("Western Arabic numerals = \(sWesternArabic), Eastern Arabic numerals = \(sEasternArabic)")
于 2014-09-25T09:56:40.427 回答
7

获取 Hajri 日期：

斯威夫特：

 let dateFor = DateFormatter()

 let hijriCalendar = Calendar.init(identifier: Calendar.Identifier.islamicCivil)
 dateFor.locale = Locale.init(identifier: "ar") // or "en" as you want to show numbers

 dateFor.calendar = hijriCalendar

 dateFor.dateFormat = "dd/MM/yyyy"
 print(dateFor.string(from: Date()))

对象-C：

NSCalendar *hijriCalendar2 = [[NSCalendar alloc]initWithCalendarIdentifier:NSCalendarIdentifierIslamicCivil];
NSDateFormatter * lastDate = [[NSDateFormatter alloc]init];

lastDate.calendar = hijriCalendar2;
[lastDate setDateFormat:@"dd/MM/yyyy HH:mm:ss"];

NSString * dateString = [lastDate stringFromDate:[NSDate date]];
于 2017-03-19T09:11:11.377 回答
4

谢谢@Grimxn，我也找到了一种显示阿拉伯数字的好方法

    let formatter = NSNumberFormatter()
    formatter.locale = NSLocale(localeIdentifier: "ar_SA")

    var date:String = "\(formatter.stringFromNumber(components.year))-\(formatter.stringFromNumber(components.month))-\(formatter.stringFromNumber(components.day))"

它将打印١-١١-١٤٣٤

于 2014-09-27T03:09:00.930 回答
4

Swift 3 & 4

let dateNow = DateFormatter()
let islamicCalendar = Calendar.init(identifier: Calendar.Identifier.islamicCivil)
dateNow.calendar = islamicCalendar
dateNow.locale = Locale.init(identifier: "ar_SA") // This is used to show numbers, day and month in arabic letters
dateNow.dateFormat = "EEE dd MMM yyyy"

print("\(dateNow.string(from: Date()))")

find out and place date format from: http://userguide.icu-project.org/formatparse/datetime

于 2017-08-01T23:43:31.397 回答
3

斯威夫特 5：

let hijriCalendar = Calendar(identifier: .islamicCivil)

let formatter = DateFormatter()
formatter.locale = Locale(identifier: "ar")
formatter.calendar = hijriCalendar
formatter.dateFormat = "dd/MM/yyyy"

print(formatter.string(from: Date()))
于 2020-07-21T13:47:24.130 回答