如何在Swift 2.0中将结构保存到NSUserDefaults [英] How to save struct to NSUserDefaults in Swift 2.0

问题描述

我有一个名为Jar的结构，我想将它们的数组保存到NSUserDefaults中.这是jar结构代码:

I have a struct named Jarand I would like to save an array of them to NSUserDefaults. Here is the jar struct code:

struct Jar {

    let name: String
    let amount: Int

    init(name: String, amount: Int){
        self.name = name
        self.amount = amount
    }
}

我相信我将需要将其转换为NSObject才能保存它. (因为您不能将结构直接保存到NSUserDefaults中).我的问题是: 如何将结构数组转换为NSObject?和如何将NSObject转换回结构数组.

I belive that I will need to convert this to an NSObject to be able to save it. (Because you can't save a struct directly to NSUserDefaults). My questions are: How do I convert an array of structs to an NSObject? and How to convert an NSObject back at an array of structs.

推荐答案

此解决方案的灵感来自@DuncanC.我编写了与自定义类编码和解码类似的方式.

This solution is inspired by @Duncan C. I wrote it more familiar way as we do in case Custom Class encoding and decoding.

public struct IRDriver {

  public var name: String?
  public var amount: Int?

  public init() {

  }

  // Decode
  public init(dictionary: Dictionary<String, AnyObject>){
    name = dictionary["name"] as? String
    amount = dictionary["amount"] as? Int
  }

  // Encode
  public func encode() -> Dictionary<String, AnyObject> {

    var dictionary : Dictionary = Dictionary<String, AnyObject>()
    dictionary["name"] = name
    dictionary["amount"] = amount
    return dictionary
  }

}

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