Email validation on textField in iOS

Question

In iOS App, how to add Email validation on UITextField?

Answer 1

perfect validation for email. try this.

- (BOOL)validateEmailWithString:(NSString*)checkString
{

    NSString *laxString = @".+@([A-Za-z0-9-]+\\.)+[A-Za-z]{2}[A-Za-z]*";
    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", laxString];
    return [emailTest evaluateWithObject:checkString];
}