RealmSwift：需要公共init（）错误

import RealmSwift import Realm public class Card : Object { dynamic var username: String = "" dynamic var firstName: String = "" dynamic var lastName: String = "" convenience init?(dictionary: [String:Any]?) { guard let dictionary = dictionary , let username = dictionary["username"] as? String else { return else} self.init() self.username = username self.firstName = firstName self.lastName = lastName } required public init() { fatalError("init() has not been implemented") } required public init( realm: RLMRealm, schema: RLMObjectSchema) { fatalError("init(realm:schema:) has not been implemented") } required public init( value: Any, schema: RLMSchema) { fatalError("init(value:schema:) has not been implemented") } } 

根据build议，我做了variablesdynamicvariablesvar而不是var，并将它们初始化为空string。 最初，我只是init（）方便的init（）。 添加领域后，方便init（）根据build议调用self.init（）。 现在默认实现询问抛出

 (fatalError("init() has not been implemented") 

什么应该在所需的公共init（）？ 我是否必须重新初始化variables？

Answer 1

正如我在回答你的上一个问题时所提到的，通过切换你的init? 方法到一个方便的初始化方法，不再需要重写超类中所需的各种初始化方法。 您可以简单地从您的子类中移除三个required public init方法。

 public class Card : Object { dynamic var username: String = "" dynamic var firstName: String = "" dynamic var lastName: String = "" convenience init?(dictionary: [String:Any]?) { guard let dictionary = dictionary, let username = dictionary["username"] as? String, let firstName = dictionary["firstName"] as? String, let lastName = dictionary["lastName"] as? String else { return nil } self.init() self.username = username self.firstName = firstName self.lastName = lastName } }