NSString Email check

- (BOOL)checkEmail

{

    const char *tmp = [self cStringUsingEncoding:NSUTF8StringEncoding];

    if (self.length != strlen(tmp))

    {

        return NO;

    }

    

    //이메일 형식 문법으로 했는지 체크한다

    NSString *check = @"([0-9a-zA-Z_-]+)@([0-9a-zA-Z_-]+)(\\.[0-9a-zA-Z_-]+){1,2}";

    NSRange match = [self rangeOfString:check options:NSRegularExpressionSearch];

    if (NSNotFound == match.location)

    {

        return NO;

    }

    return YES;

}