Get country code from country name in IOS

A Swift 4 updated version of @Daxesh Nagar solution:

private func locale(for fullCountryName : String) -> String {
    var locales : String = ""
    for localeCode in NSLocale.isoCountryCodes {
        let identifier = NSLocale(localeIdentifier: localeCode)
        let countryName = identifier.displayName(forKey: NSLocale.Key.countryCode, value: localeCode)
        if fullCountryName.lowercased() == countryName?.lowercased() {
            return localeCode as! String
        }
    }
    return locales
}

For this Input as fullCountryName

"United Kingdom"

It will return the country code as follows

"GB"

Hope it helps you guys!

Jef's answer helped here, with slight additions.

NSArray *countryCodes = [NSLocale ISOCountryCodes];
NSMutableArray *countries = [NSMutableArray arrayWithCapacity:[countryCodes count]];

for (NSString *countryCode in countryCodes)
{
    NSString *identifier = [NSLocale localeIdentifierFromComponents: [NSDictionary dictionaryWithObject: countryCode forKey: NSLocaleCountryCode]];
    NSString *country = [[[NSLocale alloc] initWithLocaleIdentifier:@"en_UK"] displayNameForKey: NSLocaleIdentifier value: identifier];
    [countries addObject: country];
}

NSDictionary *codeForCountryDictionary = [[NSDictionary alloc] initWithObjects:countryCodes forKeys:countries];

Now go through the 'codeForCountryDictionary' with the name of the country for which you require the code, for example,

NSLog(@"%@",[codeForCountryDictionary objectForKey:@"Spain"]);

would yield the result as 'ES', which is the 2 letter country code for spain.

In the Swift you will use this code

extension NSLocale {
    class func locales1(countryName1 : String) -> String {
        var locales : String = ""
        for localeCode in NSLocale.ISOCountryCodes() {
            let countryName = NSLocale.systemLocale().displayNameForKey(NSLocaleCountryCode, value: localeCode)!
            if countryName1.lowercaseString == countryName.lowercaseString {
                return localeCode as! String
            }
        }
        return locales
    }


}

Get the data:

strP2countrycode = NSLocale.locales1("PASS_COUNTRYNAME")