ios获取系统语言

NSString *languageCode = [NSLocale preferredLanguages][0];

    NSString *countryCode = [NSString  stringWithFormat:@"-%@",[[NSLocale currentLocale] objectForKey:NSLocaleCountryCode]];

    if(languageCode)

    {

        languageCode = [languageCodestringByReplacingOccurrencesOfString:countryCodewithString:@""];

    }

    return languageCode;