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);   
    return [carTest evaluateWithObject:carNo];   
}