Make a (deep) copy of an Object that conforms to Codable

问题

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.

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

回答1:

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
    }

}

来源：https://stackoverflow.com/questions/46900984/make-a-deep-copy-of-an-object-that-conforms-to-codable