이메일 & 비밀번호 유효성 검사 func login(user: String, pass: String) { let emailRegEx = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}" let emailTest = NSPredicate(format:"SELF MATCHES %@", emailRegEx) let emailValid: Bool = emailTest.evaluate(with: user) let passValid: Bool = (pass != "" && pass.count >= 6) if (emailValid && passValid) { let foodListVC = self.storyboard?.instantiateViewController(ident..