ios判断邮箱,手机号码，车牌号是否合法（正则表达）

/*邮箱验证 MODIFIED BY HELENSONG*/
-(BOOL)isValidateEmail:(NSString *)email
{
    NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
    return [emailTest evaluateWithObject:email];
}

/*手机号码验证 MODIFIED BY HELENSONG*/
-(BOOL) isValidateMobile:(NSString *)mobile
{
    //手机号以13， 15，18开头，八个 \d 数字字符
    NSString *phoneRegex = @"^((13[0-9])|(15[^4,\\D])|(18[0,0-9]))\\d{8}$";
    NSPredicate *phoneTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",phoneRegex];
//    NSLog(@"phoneTest is %@",phoneTest);
    return [phoneTest evaluateWithObject:mobile];
}

/*车牌号验证 MODIFIED BY HELENSONG*/ 
BOOL validateCarNo(NSString* carNo) 
{ 
    NSString *carRegex = @"^[A-Za-z]{1}[A-Za-z_0-9]{5}$"; 
    NSPredicate *carTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",carRegex]; 
    NSLog(@"carTest is %@",carTest);