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Email Validation in Objective-C (based on emailregex.com)
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| static NSString * BLVFormFieldValidator_EmailRegex = @"(?i)(?:[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])+)\\])"; |
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Sample emails for unit tests:
self.validEmails = @[ @"[email protected]", @"1234567890123456789012345678901234567890123456789012345678901234@iana.org", @"\"first\\\"last\"@iana.org", @"\"first@last\"@iana.org", @"\"first\\last\"@iana.org", @"first.last@[12.34.56.78]", @"first.last@x23456789012345678901234567890123456789012345678901234567890123.iana.org", @"[email protected]", @"[email protected]", @"\"first\\last\"@iana.org", @"\"Abc\\@def\"@iana.org", @"[email protected]", @"customer/[email protected]", @"[email protected]", @"!def!xyz%a[email protected]", @"[email protected]", @"[email protected]", @"[email protected]", @"[email protected]", @"[email protected]", @"[email protected]", @"[email protected]", @"[email protected]", @"t*[email protected]", @"[email protected]", @"{_test_}@iana.org", @"customer/[email protected]", @"\"Austin@Powers\"@iana.org", @"[email protected]", @"[email protected]", @"[email protected]", @"[email protected]", @"[email protected]", @"[email protected]" ]; self.invalidEmails = @[ @"[email protected],com", @"first\\@[email protected]", @"first.last", @"[email protected]", @"[email protected]", @"[email protected]", @"\"first\"last\"@iana.org", @"first\\@[email protected]", @"first.last@", @"first.last@[.12.34.56.78]", @"first.last@[12.34.56.789]", @"[email protected]", @"[email protected]", @"abc\\@[email protected]", @"abc\\@iana.org", @"Doug\\ \\\"Ace\\\"\\ [email protected]", @"@iana.org", @"doug@", @"[email protected]", @"()[]\\;:,><@iana.org", @"test@.", @"NotAnEmail" ];