如何在SceneKit SWIFT中添加对象

I have 2 files that I imported from Blender(3D design program) they are both .dae specifically they are "CampusField1.dae" CampusField is the ground/floor of the game and "Bob.dae" is the Man/character. My question is when I set CampusField1 as the scene how do I get "Bob" in the scene too. And the other question is lets say I export the .dae from blender now I put the file in the game... every things good but then is the animation for Bob already attached to the Bob.dae file or do I have to export something else from blender so that I can run the animation because I don't know what the animation ID would be or how to actually make it run and to actually make Bob do something. I have 2 files that I imported from Blender(3D