How to check whether the email is in valid format or not?

Question

I am using the following code to check the validation of my email which is entered in the uitextfield. But it is returning true when I enter [email protected] it is not returning false.

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];

Anyone can suggest me ?

There are many discussions about using regular expressions for validating email addresses, for example here: http://stackoverflow.com/questions/201323/using-a-regular-expression-to-validate-an-email-address. - Also `[email protected]` looks "well-formed" to me (but I may be wrong!) and matches the regular expression. Why do you expect to get false? — Martin R, Apr 02 '14 at 07:42
But I don't need the [email protected]. I need like [email protected] — Sharme, Apr 02 '14 at 07:48

score 1 · Answer 1 · answered Apr 02 '14 at 07:40

1

Email validation for ios code.

- (BOOL)validateEmailWithString:(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];
}

Textfield delegate

- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    [textField resignFirstResponder];

    if ([self validateEmailWithString:textField.text])
    {
        Nslog(@"Valid");
    }
    else
    {
        Nslog(@"Not Valid");
    }

}

answered Apr 02 '14 at 07:40

Kirit Modi

23,155
15
89
112

I am using the same code. I don't want another .com in the email address and should return as false. I need like [email protected] – Sharme Apr 02 '14 at 07:46
Why do you want to exclude .com.com? – lootsch Apr 02 '14 at 07:48
1

*m.com.com* is a (possible) subdomain of com.com – lootsch Apr 02 '14 at 07:51

score 1 · Accepted Answer · answered Apr 02 '14 at 08:12

Don't exclude the domain m.com.com, as it's a possible subdomain of com.com (wich maybe looks strange, but is a valid - and btw. real - domain).

If you still want to exclude all subdomains (saying: only allow one . after @) you would exclude email addresses like:

So, you maybe don't want to exclude them.

How to check whether the email is in valid format or not?

2 Answers2