swift3 – Swift 3 Xcode 8 – SwiftValue encodeWithCoder –

required init(coder decoder: NSCoder) {
    super.init()

    createdDate = decoder.decodeObject(forKey: "created_date") as? Date
    userId = decoder.decodeInteger(forKey: "user_id")
}

func encode(with aCoder: NSCoder) {
    aCoder.encode(createdDate,forKey: "created_date")
    aCoder.encode(userId,forKey: "user_id")
}

这是Swift 3中nscoding协议的正确方法名称,但应用程序崩溃时出现错误SwiftValue encodeWithCoder – 无法识别的选择器发送到实例

显然这种方法不可用,为什么不被认可？

参考文献https://developer.apple.com/reference/foundation/nscoding

这是我制作的归档方法

func encodeObject(_ defaults:UserDefaults,object:NSCoding?,key:String) {
    if (object != nil) {
        let encodedObject = NSKeyedArchiver.archivedData(withRootObject: object)
        defaults.set(encodedObject,forKey: key)
    } else {
        defaults.removeObject(forKey: key)
    }
}