Adding Camera node  provide us the point of view from which we view our scene. To add camera node we have to simply make the SCNCamera object and assign it to node’s camera property.

  let scene = SCNScene ()   // set up a scene
        
        // Add the geometry object , it will make a visible content on scene. Here we are using SCNBox type
        let boxShape = SCNBox.init(width: 1, height: 1, length: 1, chamferRadius: 0)
        
         boxShape.firstMaterial!.diffuse.contents = UIColor.redColor()  // this will add color to the geometry object
        
        let boxNode = SCNNode (geometry: boxShape)
        
        scene.rootNode.addChildNode(boxNode) // add boxNode as the child node to the scene's root node

        
     
       Add camera node to your Scene
       

 let camera = SCNCamera ()
        
        let cameraNode = SCNNode ()
        
        cameraNode.camera = camera
        
        cameraNode.position = SCNVector3Make(0, 0, 10) // set your camera position
        
        scene.rootNode.addChildNode(cameraNode)
        
        sceneView.scene = scene //add scene to your SCNView 
        
        sceneView.allowsCameraControl = true // this will change the point of view by a simple touch.