無法使用對象映射器swift 3.0的領域012

Question

我使用Realm與對象映射器進行JSON解析。當我創建使用兩種對象映射器和境界比我得到一個模型類編譯錯誤

error:must call a designated initializer of the superclass 'QuestionSet'

import ObjectMapper 
import RealmSwift 

class QuestionSet: Object, Mappable { 

    //MARK:- Properties 
    dynamic var id:Int = 0 
    dynamic var title:String? 
    dynamic var shortTitle:String? 
    dynamic var desc:String? 
    dynamic var isOriginalExam:Bool = false 
    dynamic var isMCQ:Bool = false 
    dynamic var url:String? 

    //Impl. of Mappable protocol 
    required convenience init?(map: Map) { 
     self.init() 
    } 

    //mapping the json keys with properties 
    public func mapping(map: Map) { 
     id   <- map["id"] 
     title  <- map["title"] 
     shortTitle <- map["short_title"] 
     desc  <- map["description"] 
     isMCQ <- map["mc"] 
     url  <- map["url"] 
     isOriginalExam <- map["original_pruefung"] 
    } 
} 

如果我用super.init（）在init方法比我得到的編譯錯誤

案例1：

//Impl. of Mappable protocol 
required convenience init?(map: Map) { 
    self.init() 
} 

error:must call a designated initializer of the superclass 'QuestionSet'

情況2：

//Impl. of Mappable protocol 
required convenience init?(map: Map) { 
    super.init() 
} 

Convenience initializer for 'QuestionSet' must delegate (with 'self.init') rather than chaining to a superclass initializer (with 'super.init')

情況3：

//Impl. of Mappable protocol 
required convenience init?(map: Map) { 
    super.init() 
    self.init() 
} 

error 1: must call a designated initializer of the superclass 'QuestionSet'

Initializer cannot both delegate ('self.init') and chain to a superclass initializer ('super.init')

Convenience initializer for 'QuestionSet' must delegate (with 'self.init') rather than chaining to a superclass initializer (with 'super.init')

Answer 1

我用這個模式：

我有一個BaseObject，我所有的領域對象從

open class BaseObject: Object, StaticMappable { 

    public class func objectForMapping(map: Map) -> BaseMappable? { 
     return self.init() 
    } 

    public func mapping(map: Map) { 
     //for subclasses 
    } 
} 

繼承然後你的類應該是這樣的：

import ObjectMapper 
import RealmSwift 

class QuestionSet: BaseObject { 

    //MARK:- Properties 
    dynamic var id:Int = 0 
    dynamic var title:String? 
    dynamic var shortTitle:String? 
    dynamic var desc:String? 
    dynamic var isOriginalExam:Bool = false 
    dynamic var isMCQ:Bool = false 
    dynamic var url:String? 

    //mapping the json keys with properties 
    public func mapping(map: Map) { 
     id   <- map["id"] 
     title  <- map["title"] 
     shortTitle <- map["short_title"] 
     desc  <- map["description"] 
     isMCQ <- map["mc"] 
     url  <- map["url"] 
     isOriginalExam <- map["original_pruefung"] 
    } 
}