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ios8nscodingnskeyedarchiverscenekit

SceneKit and NSKeyedArchiver

I am trying to archive my SceneKit scene for saving using NSKeyedArchiver. This is so I can save the scene allowing me to restore it at a later date. I am finding that the restored scene seems to ignore/lose the SCNTransformConstraints I have added to various SCNNodes. This results is the nodes being placed in the wrong place.

I am wondering if this is by design or a bug? Or am I doing something wrong?

Any pointers would be appreciated.

Solution

  • SCNTransformConstraints works with a block provided by the client of the API. Blocks can't be archived with NSKeyedArchiver. You need to archive another object instead that is be able to reconstruct the block and re-assign the transform constraint.