Email Regular expression issue while using special characters

Question

I have created the following regular expression for validating my email

- (BOOL)isValidEmail
{
    BOOL stricterFilter = YES;
    NSString *stricterFilterString = @"[A-Z0-9a-z\\._%+-]+@([A-Za-z0-9-]+\\.)+[A-Za-z]{2,4}";
    NSString *laxString = @".+@([A-Za-z0-9]+\\.)+[A-Za-z]{2}[A-Za-z]*";
    NSString *emailRegex = stricterFilter ? stricterFilterString : laxString;
    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
    return [emailTest evaluateWithObject:self];
}

But it fails when i enter following:

b. !@#$%^ bfv@mn.cn

Is there any issue with my regular expression?

You pretty much cannot validate email addresses... the only way to know for sure is to send out a confirmation email. — luk2302, Dec 28 '15 at 12:23
feel free to try to validate email addresses and be in a world of pain - go ahead and try the other regex — luk2302, Dec 28 '15 at 12:29
while "horst@bayern" is a valid email address that you would currently reject - do not even try. — luk2302, Dec 28 '15 at 12:30

score 0 · Answer 1 · answered Dec 28 '15 at 12:26

0

Try this. It's work perfect for me.

 NSString *mailreg=@"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
NSPredicate *mailtest=[NSPredicate predicateWithFormat:@"SELF MATCHES %@",mailreg];
return [mailtest evaluateWithObject:checkString];

answered Dec 28 '15 at 12:26

kb920

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Email Regular expression issue while using special characters

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