iOS-具有日期类型属性的非归档NSSecureCoding对象

EventNotificationInfo

对象的实例

   @objc(EventNotificationInfo)
    class EventNotificationInfo: NSObject, NSSecureCoding {
        public var name: String
        public var startTime: Date
        public var hexColor: String

         init(name: String, startTime: Date, hexColor: String) {
            self.name = name
            self.startTime = startTime
            self.hexColor = hexColor
        }

        private  struct Keys {
            static var name: String = "name"
            static let startTime: String = "startTime"
            static let hexColor: String = "hexColor"
        }

        static var supportsSecureCoding: Bool = true

        func encode(with coder: NSCoder) {
            coder.encode(name, forKey: Keys.name)
            coder.encode(startTime, forKey: Keys.startTime)
            coder.encode(hexColor, forKey: Keys.hexColor)
        }

        required init?(coder: NSCoder) {
            guard let name = coder.decodeObject(forKey: Keys.name) as? String  else {
                return nil
            }

            guard let startTime = coder.decodeObject(forKey: Keys.startTime) as? Date else {
                print("You are here")
                return nil
            }

            guard let color = coder.decodeObject(forKey: Keys.hexColor) as? String  else {
                return nil
            }
            self.name = name
            self.startTime = startTime
            self.hexColor = color
        }
    }

使用以下代码，我归档并取消归档上述对象

let event = EventNotificationInfo(name: "Hello from California",
                                        startTime:Date(),
                                        hexColor: "000000")

当xCode到达我在最后一行设置的断点（

unArchive

variable）时，会发生致命错误。这是控制台的消息

let eventInfo  = try? NSKeyedArchiver.archivedData(withRootObject: event, requiringSecureCoding: false)


let unArchive = try! NSKeyedUnarchiver.unarchivedObject(ofClass: TPEventNotificationInfo.self, from: eventInfo!)

有什么问题吗？如何取消此对象的归档？

---

信息：我使用了

String

类型的

startTime

。而且进展顺利

根据：

重写

init（coder:）

的对象必须解码任何包含的 使用

decodeObjectOfClass:forKey:

方法的对象。例如：

let obj=decoder.decodeObject（of:MyClass.self，forKey:“myKey”）

您应该在

init（coder:）

的实现中这样做

另外，不要使用

try

，您应该将其包装在一个

do

/

catch

中，以便查看是否发生错误

You are here.
Fatal error: 'try!' expression unexpectedly raised an error: Error Domain=NSCocoaErrorDomain Code=4864 "value for key 'startTime' was of unexpected class 'NSDate'. Allowed classes are '{(
    EventNotificationInfo
)}'." UserInfo={NSDebugDescription=value for key 'startTime' was of unexpected class 'NSDate'. Allowed classes are '{(
    EventNotificationInfo
)}'.}: file

guard let startTime = coder.decodeObject(of: NSDate.self, forKey: Keys.startTime) as Date? else {
    return nil
}