Scenekit detecting User tapped object

Question

I recently started using scenekit for scenekit in iOS 8. I am facing difficulty in detecting whether the user has tapped or pressed on the object. Is there any way to do tha

Answer 1

Add a tap gesture to the object and check whether it is a SCNNode()

     @objc func tapGestureRec(sender: UIPanGestureRecognizer? = nil){
            let location: CGPoint = (sender?.location(in: self.view))!
            let hits = self.sceneKitView.hitTest(location, options: nil)
            if let tappedNode : SCNNode = hits.first?.node {
                ...
            }
     }

Answer 2

See the documentation for the hitTest method. Call that from wherever you're handling touch events to get a list of 3D scene objects/locations "under" a 2D screen point.

Answer 3

An easy way to get sample code that shows the hitTest in action is to create a sample app using the Game template in XCode6. Create a new project, select the "Game" template.

The hitTest code should be there in the implementation of:

- (void) handleTap:(UIGestureRecognizer*)gestureRecognize