ios - 将自定义词典保存为用户默认值

Question

struct AllItemsData {
    var DSTBID: String!
    var CCAS: String!
    var BCAS: String!
}

这是我创建类型数组的结构AllItemsDataArray = [AllItemsData()]

添加一些数据后，现在我想将其存储到用户默认值中。

我是这样做的:

AllItemsDataArray.removeFirst()

let archivedArray = NSKeyedArchiver.archivedData(withRootObject: All_ItemsDataArray)
            print(archivedArray)
            preference.set(archivedArray, forKey: allItemsDataKey)

但是错误是这样的:

ios[1540:537869] -[_SwiftValue encodeWithCoder:]: unrecognized selector sent to instance 0x15d1e200

崩溃发生前数组中的值是:

AllItemsData(DSTBID: GGGGGGGGGGGG, CCAS: , BCAS: )
AllItemsData(DSTBID: HHHHHHHHHHHH, CCAS: , BCAS: )

Answer 1

您需要为您的对象实现 NSCoding 协议(protocol)，并使用 class 而不是 struct

class AllItemsData: NSObject, NSCoding {
    var DSTBID: String!
    var CCAS: String!
    var BCAS: String!

    required convenience init?(coder decoder: NSCoder) {
        let DSTBID = decoder.decodeObjectForKey("DSTBID") as? String,
        let CCAS = decoder.decodeObjectForKey("CCAS") as? String,
        let BCAS = decoder.decodeObjectForKey("BCAS") as? [String]

        self.init(
            DSTBID: DSTBID,
            CCAS: CCAS,
            BCAS: BCAS
        )
    }

    func encodeWithCoder(coder: NSCoder) {
        coder.encodeObject(self.DSTBID, forKey: "DSTBID")
        coder.encodeObject(self.CCAS, forKey: "CCAS")
        coder.encodeInt(Int32(self.BCAS), forKey: "BCAS")
    }
}