How to validate email address field?

[vikysaran]

Hello,
give me some code to validate email field.
Also other validation code those are mostly used.

[Forsworn]

Cocoa with Love: Verifying that a string contains an email address using NSPredicate

[vikysaran]

Originally Posted by Forsworn

Cocoa with Love: Verifying that a string contains an email address using NSPredicate

Thanx for reply. I tried this-

NSString *email = textFieldemail.text;
    NSString *emailRegEx =
    @"(?:[a-z0-9!#$%\\&'*+/=?\\^_`{|}~-]+(?:\\.[a-z0-9!#$%\\&'*+/=?\\^_`{|}"
    @"~-]+)*|\"(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21\\x23-\\x5b\\x5d-\\"
    @"x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])*\")@(?:(?:[a-z0-9](?:[a-"
    @"z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\\[(?:(?:25[0-5"
    @"]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-"
    @"9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21"
    @"-\\x5a\\x53-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])+)\\])";
    
    NSPredicate *regExPredicate =
    [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegEx];
    BOOL myStringMatchesRegEx = [regExPredicate evaluateWithObject:email];

working great but not if letters are in caps. So how to edit this condition? Also i want user will be able to enter multiple email addresses saperated by ;

Reply soon

[shiva.0537]

Originally Posted by vikysaran

Thanx for reply. I tried this-

NSString *email = textFieldemail.text;
    NSString *emailRegEx =
    @"(?:[a-z0-9!#$%\\&'*+/=?\\^_`{|}~-]+(?:\\.[a-z0-9!#$%\\&'*+/=?\\^_`{|}"
    @"~-]+)*|\"(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21\\x23-\\x5b\\x5d-\\"
    @"x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])*\")@(?:(?:[a-z0-9](?:[a-"
    @"z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\\[(?:(?:25[0-5"
    @"]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-"
    @"9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21"
    @"-\\x5a\\x53-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])+)\\])";
    
    NSPredicate *regExPredicate =
    [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegEx];
    BOOL myStringMatchesRegEx = [regExPredicate evaluateWithObject:email];

working great but not if letters are in caps. So how to edit this condition? Also i want user will be able to enter multiple email addresses saperated by ;

Reply soon

Hi,

I am trying same thing but not working for me. Do i need to include any framework or import any class. I am not getting any error also.

Thank you
shiva

[vikysaran]

Originally Posted by vikysaran

Hi,

I am trying same thing but not working for me. Do i need to include any framework or import any class. I am not getting any error also.

Thank you
shiva

why not working? could you post the code you using?

[shiva.0537]

Originally Posted by vikysaran

why not working? could you post the code you using?

Hi,

NSString *email = emailTextField.text;
NSString *emailRegEx =
@"(?:[a-z0-9!#$%\\&'*+/=?\\^_`{|}~-]+(?:\\.[a-z0-9!#$%\\&'*+/=?\\^_`{|}"
@"~-]+)*|\"(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21\\x23-\\x5b\\x5d-\\"
@"x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])*\")@(??:[a-z0-9](?:[a-"
@"z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\\[(??:25[0-5"
@"]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-"
@"9][0-9]?|[a-z0-9-]*[a-z0-9]?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21"
@"-\\x5a\\x53-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])+)\\])";

NSPredicate *regExPredicate =[NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegEx];
BOOL myStringMatchesRegEx = [regExPredicate evaluateWithObject:email];
if(!myStringMatchesRegEx){
[self showAlertWithText:@"Please enter a valid email address"];
}

This is my code.
Could you please tell me, do i need to import any class or framework?

Thanks
shiva

[vikysaran]

email address should be is small letters. did you notice that?

[shiva.0537]

Originally Posted by vikysaran

email address should be is small letters. did you notice that?

NO,
Thank you for reminding me.

[Kris]

Originally Posted by shiva.0537

NO,
Thank you for reminding me.

You can simply use [email lowercaseString].

[subodh kumar]

hi

When i am editing email address again and then checking .it is returning false.

why
thanks

[vikysaran]

This should also work!...

    NSArray *validateAtSymbol = [txtLoginId.text componentsSeparatedByString:@"@"];
    NSArray *validateDotSymbol = [txtLoginId.text componentsSeparatedByString:@"."];
    if(([validateAtSymbol count] != 2) || ([validateDotSymbol count] < 2)) {
        
        UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:nil message:@"Invalid EMail Address" delegate:self cancelButtonTitle:nil otherButtonTitles:@"Ok", nil];
        [alertView show];
        [alertView release];
        whereClicked = 1;
        return;
    }