从任何语言转换数字字符串，同时保留前导零

I have a number string that is in Arabic language, I want to convert it to English, I use this:

我有一个阿拉伯语的数字字符串,我想将其转换为英语,我用这个:

let arabicPhoneNumber = "٠١٠١٢٣٤٥٦٧٨٩"
let formatter = NumberFormatter()
formatter.locale = Locale(identifier: "EN")
if let number = formatter.number(from: arabicPhoneNumber)?.stringValue {
    print(number) //deletes leading zero
}

the problem is it deletes the leading zero and I want to preserve it as this is a phone number. is there a way to convert phone number string from Arabic to English without losing leading zeros ??

问题是它删除了前导零,我想保留它,因为这是一个电话号码。有没有办法将电话号码字符串从阿拉伯语转换为英语而不会丢失前导零?

2 个解决方案

#1

Instead of converting the string to a number, you can do a "transliteration" to the Latin script, using CFStringTransform() from the Foundation library:

您可以使用Foundation库中的CFStringTransform(),而不是将字符串转换为数字,而是对Latin脚本执行“音译”:

let arabicPhoneNumber = "٠١٠١٢٣٤٥٦٧٨٩"

// We need a CFMutableString and a CFRange:
let cfstr = NSMutableString(string: arabicPhoneNumber) as CFMutableString
var range = CFRange(location: 0, length: CFStringGetLength(cfstr))

// Do the transliteration (this mutates `cfstr`):
CFStringTransform(cfstr, &range, kCFStringTransformToLatin, false)

// Convert result back to a Swift string:
let phoneNumber = cfstr as String

print(phoneNumber) // 010123456789

This preserves all digits as well as possible separators.

这将保留所有数字以及可能的分隔符。

Remark: The above example (from the question) contains "Arabic Indic" digits, for example ١ = U+0661 = "ARABIC-INDIC DIGIT ONE". These are correctly transliterated on macOS 10.12 and iOS 10.

备注:以上示例(来自问题)包含“阿拉伯语印度”数字,例如1 = U + 0661 =“ARABIC-INDIC DIGIT ONE”。这些是在macOS 10.12和iOS 10上正确音译的。

On earlier OS versions,

在早期的OS版本中,

CFStringTransform(cfstr, &range, kCFStringTransformLatinArabic, true)
CFStringTransform(cfstr, &range, kCFStringTransformStripCombiningMarks, false)

worked correctly in my tests to convert arabic digits to latin.

在我的测试中正确工作将阿拉伯数字转换为拉丁语。

#2

swift 4.0

 func convertToEnDigits(_ digits: String) -> String {
    // We need a CFMutableString and a CFRange:
    let cfstr = NSMutableString(string: digits) as CFMutableString
    var range = CFRange(location: 0, length: CFStringGetLength(cfstr))
    // Do the transliteration (this mutates `cfstr`):
    CFStringTransform(cfstr, &range, kCFStringTransformToLatin, false)
    // Convert result back to a Swift string:
    return (cfstr as String)
}

#1