iphone - Converting Country Codes to Country Names

Question

I need to convert a list of country codes to a country array. Here is what I have done so far.

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    pickerViewArray = [[NSMutableArray alloc] init]; //pickerViewArray is of type NSArray;
    pickerViewArray =[NSLocale ISOCountryCodes];
}

Answer 1

You can get an identifier for a country code with localeIdentifierFromComponents: and then get its displayName.

So to create an array with country names you can do:

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

for (NSString *countryCode in [NSLocale ISOCountryCodes])
{
    NSString *identifier = [NSLocale localeIdentifierFromComponents: [NSDictionary dictionaryWithObject: countryCode forKey: NSLocaleCountryCode]];
    NSString *country = [[NSLocale currentLocale] displayNameForKey: NSLocaleIdentifier value: identifier];
    [countries addObject: country];
}

To sort it alphabetically you can add

NSArray *sortedCountries = [countries sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];

Note that the sorted array is immutable.