制作符合Codable的对象的(深层)副本 [英] Make a (deep) copy of an Object that conforms to Codable

问题描述

我有一个对象，该对象从Realm继承了Object，并符合Codable的要求，以便在与API通讯时与JSON相互转换.

I have an object that subclasses Object from Realm, and conforms to Codable in order to convert to and from JSON when talking to an API.

如何利用Codable协议进行深拷贝(包括子对象)?

How can I make a deep copy (include children objects) by leveraging the Codable protocol?

推荐答案

这将利用Codable协议对对象进行深层复制.正如@ itai-ferber所提到的，与NSCopying相比，它将有很高的开销.

This will make a deep copy of an object leveraging the Codable protocol. As mentioned by @itai-ferber it will have a high overhead when compared to NSCopying.

class MyObject: Object, Codable {

    /* details omitted */
    var children = List<ChildObject>()

    func copy() throws -> MyObject {
        let data = try JSONEncoder().encode(self)
        let copy = try JSONDecoder().decode(MyObject.self, from: data)
        return copy
    }

}

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