title: ARKit - How to get the specific node in sceneview?
body: <p>I'm new in ARKit. I want to get a specific node in sceneview to interactive with that node. This is my code:</p>
  
  <pre><code>@objc func moveNode(_ gesture: UIPanGestureRecognizer) {
  
      if !isRotating{
  
          //1. Get The Current Touch Point
          let currentTouchPoint = gesture.location(in: self.sceneView)
  
          //2. Get The Next Feature Point Etc
          guard let hitTest = self.sceneView.hitTest(currentTouchPoint, types: .existingPlane).first else { return }
  
          //3. Convert To World Coordinates
          let worldTransform = hitTest.worldTransform
  
          //4. Set The New Position
          let newPosition = SCNVector3(worldTransform.columns.3.x, worldTransform.columns.3.y, worldTransform.columns.3.z)
  
          //5. Apply To The Node
          self.sceneView.scene.rootNode.enumerateChildNodes{ (node, _) in
              //**********************************************************
              // how to detect which node is active to interactive here???
              node.simdPosition = float3(newPosition.x, newPosition.y, newPosition.z)
              //**********************************************************
          }
      }
  }
  </code></pre>
  
  <p>How to detect which node is active to interactive in ** code block? Thank you.</p>