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  • Email Validation in iOS

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    While creating any Login or Registration UI in iOS we ask user to enter their email id. To avoid wrong data entry we can validate entered data by using a simple validation method. Below method will return you a BOOL value. Here it is:-

     -(BOOL)validateEmail: (NSString *) candidate {
        NSString *emailRegex = @"(?:[A-Za-z0-9!#$%\\&'*+/=?\\^_`{|}~-]+(?:\\.[A-Za-z0-9!#$%\\&'*+/=?\\^_`{|}" @"~-]+)*|\"(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21\\x23-\\x5b\\x5d-\\" @"x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])*\")@(?:(?:[A-Za-z0-9](?:[a-" @"z0-9-]*[A-Za-z0-9])?\\.)+[A-Za-z0-9](?:[A-Za-z0-9-]*[A-Za-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-Za-z0-9-]*[A-Za-z0-9]:(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21" @"-\\x5a\\x53-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])+)\\])";
    
        NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
    
        BOOL result = [emailTest evaluateWithObject:candidate];
    
        return result;
    }

    Happy Coding!!!

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