NSCoding and GameplayKit Classes

Question

In my game I have a NSCoding-conforming Combat class, which also uses GameplayKit's GKGridGraph and GKGridGraphNode objects, which do not conform to NSCoding. Is there a way to serialize/unserialize these objects?

Answer 1

As you've noted, there's no NSCoding support in these classes. (That'd make a good feature request to send to Apple, though.)

It should be possible, however, to create your own serialized representation of a graph when encoding your classes, then read that in and initialize new GKGraph and GKGraphNode objects accordingly in your init(coder:) implementation. Note that when doing so you'll have to carefully walk the graph yourself to capture all the node connections.