iOS 将电话号码转换为国际格式

Question

在我的 iOS 应用程序中，我必须转换电话号码(在联系人中获取)并将其转换为国际格式(以使用外部库自动发送 SMS)。我看到了libPhoneNumber但问题是我们必须输入国家代码，而且该应用程序必须在所有(几乎)国家/地区运行，所以我不知道用户的国家/地区是什么。

这是图书馆的工作方式:

let phoneUtil = NBPhoneNumberUtil()
let phoneNumberConverted = try phoneUtil.parse("0665268242", defaultRegion: "FR") // So I don't know the country of the user here
print(try? phoneUtil.format(phoneNumberConverted, numberFormat: NBEPhoneNumberFormat.INTERNATIONAL))

Answer 1

formattedPhoneNumberSubstring 采用部分电话号码字符串并将其格式化为格式正确的国际号码的开头，例如“16463”变为“+1 646-3”。

NSString *formattedPhoneNumberSubstring(NSString *phoneNumber) {
NBPhoneNumberUtil *phoneUtil = [NBPhoneNumberUtil sharedInstance];
phoneNumber = [phoneUtil normalizeDigitsOnly:phoneNumber];
NSString *nationalNumber;
NSNumber *countryCode = [phoneUtil extractCountryCode:phoneNumber nationalNumber:&nationalNumber];
if ([countryCode isEqualToNumber:@0])
    return phoneNumber;

NSString *regionCode = [[phoneUtil regionCodeFromCountryCode:countryCode] objectAtIndex:0];
NSString *paddedNationalNumber = [nationalNumber stringByPaddingToLength:15 withString:@"0" startingAtIndex:0];
NSString *formatted;
NSString *formattedSubstr;
for (int i=0; i < paddedNationalNumber.length; i++) {
    NSError *error = nil;
    formattedSubstr = [phoneUtil format:[phoneUtil parse:[paddedNationalNumber substringToIndex:i] defaultRegion:regionCode error:&error]
                           numberFormat:NBEPhoneNumberFormatINTERNATIONAL error:&error];
    if (getExtraCharacters(formattedSubstr) > getExtraCharacters(formatted)) // extra characters means more formatted
        formatted = formattedSubstr;
}

// Preparing the buffer for phoneNumber
unichar phoneNumberBuffer[phoneNumber.length+1];
[phoneNumber getCharacters:phoneNumberBuffer range:NSMakeRange(0, phoneNumber.length)];

// Preparing the buffer for formatted
unichar formattedBuffer[formatted.length+1];
[formatted getCharacters:formattedBuffer range:NSMakeRange(0, formatted.length)];

int j=0;
for(int i = 0; i < phoneNumber.length && j < formatted.length; i++) {
    while(formattedBuffer[j] != phoneNumberBuffer[i]) j++;
    j++;
}

return [formatted substringToIndex:j];