iOS 获取国家列表、转json

    NSLocale *locale = [NSLocale currentLocale];

    

    NSArray *countryArray = [NSLocale ISOCountryCodes];

    NSMutableDictionary *objectDic = [[NSMutableDictionary alloc] init];

    for (NSString *countryCode in countryArray)

    {

        NSString *displayNameString = [locale displayNameForKey:NSLocaleCountryCode value:countryCode];

        [objectDic setObject:displayNameString forKey:countryCode];

    }

    NSString *jsonString = [objectDic jsonStringEncoded];

    NSLog(@"json：%@",jsonString);

    NSLog(@"%@",objectDic);