swift4领域模型-覆盖描述(java toString()等效)

我有个问题。我正在尝试重写描述方法以按需要打印参考值。我读到这相当于Java toString()方法(我是swift新手)

问题是,它不起作用,我找不到任何解决方案。我完全按照示例中的方法来做。。我做错了什么?

这是我的代码:

import Foundation
import RealmSwift

@objcMembers class Patient: Object{

    //toString()
    override var description: String{
        return "Patient: Ref nr: \(self.referenceNumber), First name: \(self.firstName), Surname: \(self.surname) Email:  \(self.email)"
    }

    var patientId:Int{
        return self.patientId
    }
    dynamic var referenceNumber: String = ""
    dynamic var firstName:String = ""
    dynamic var surname:String = ""
    dynamic var email:String = ""

    convenience init(referenceNumber:String, firstName:String, surname:String, email:String) {
        self.init()
        self.referenceNumber = referenceNumber
        self.firstName = firstName
        self.surname = surname
        self.email = email
    }

现在,每当我尝试打印时:(我发布了更多代码,以防史密斯的错误早于打印)

var patient: Results<Patient>!

override func viewDidLoad() {
    super.viewDidLoad();

    let realm = RealmService.shared.realm
    let patient = realm.objects(Patient.self) //tocheck: can I get only one element from Realm and set to store only 1 element?

    //HERE IT GOES WRONG
    print(patient) //case 1
    print(patient.description) //case 2
}

它在控制台中打印:(在两种情况下相同)

Results<Patient> <0x7fccaaf03b90> (
    [0] Patient {
        referenceNumber = 231321;
        firstName = James;
        surname = Rodriguez;
        email = jr@lalalla.pl;
    }
)

为什么?