无法使用 NSKeyedArchiver 存档自定义类对象

该方法应用于符合 NOT 的对象。NSKeyedArchiver.archivedData(withRootObject:)NSCodingCodable/Encodable/Decodable 如果希望对象实现协议，可以使用 和 类似实现相同的操作：CodableJSONEncoderJSONDecoder let car = Car(name: "Ferrari") if let encodedCarData: Data = try? JSONEncoder().encode(car) { let decodedCar = try? JSONDecoder().decode(Car.self, from: encodedCarData) }

如果您希望改用 ，可以使用以下示例：

NSKeyedArchiver class Car: NSObject, NSSecureCoding {

static var supportsSecureCoding: Bool { return true }

var name: String

init(name: String) {
    self.name = name
}

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

func encode(with aCoder: NSCoder) {
    aCoder.encode(name, forKey: "name")
}

}

let car = Car(name: "Ferrari") if let encodedCarData = try? NSKeyedArchiver.archivedData(withRootObject: car, requiringSecureCoding: false) { let decodedCar = try NSKeyedUnarchiver.unarchivedObject(ofClass: Car.self, from: encodedCarData) } 您还应注意，在 iOS 12.0 中已弃用，您应该改用。archivedData(withRootObject:)+archivedDataWithRootObject:requiringSecureCoding:error: