nscoder swift 无法发送到 NSCoder 类的抽象对象

Question

我正在尝试通过SymSpell实现自动更正

我已经在容器应用程序中创建了字典，应该保存它并从键盘扩展中读取它

字典包含一个dictionaryItem对象，需要被NSCoder序列化才能保存

我尝试将方法添加到对象，但出现错误“init(coder adecoder nscoder) swift cannot be sent to an abstract object of class NSCoder”

required init(coder aDecoder: NSCoder) {
   if let suggestions = aDecoder.decodeObjectForKey("suggestions") as? [Int] {
      self.suggestions = suggestions
  }
      if let count = aDecoder.decodeObjectForKey("count") as? Int {
         self.count = count
      }
}
func encodeWithCoder(aCoder: NSCoder) {
     if let count = self.count as? Int {
        aCoder.encodeObject(count, forKey: "count")
     }
    if let suggestions = self.suggestions as? [Int] {
        aCoder.encodeObject(suggestions, forKey: "suggestions")
     }
}

任何想法如何解决这个问题？

Answer 1

import Foundation

class SuggestionModel: NSObject, NSCoding {
    var suggestions: [Int]?
    var count : Int?

    required init(coder aDecoder: NSCoder) {
        self.suggestions = aDecoder.decodeObjectForKey("suggestions") as? [Int]
        self.count = aDecoder.decodeObjectForKey("count") as? Int
        super.init()
    }

    func encodeWithCoder(aCoder: NSCoder) {
        aCoder.encodeObject(self.count, forKey: "count")
        aCoder.encodeObject(self.suggestions, forKey: "suggestions")
    }

    override init() {
        super.init()
    }
}