title: Could not open file obj SceneKit
body: <p>I have the problem "Could not open obj file". I'm a beginner in iOS development.</p>
  
  <pre><code>func loadObj() {
      let url = URL(string: "http://ec2-34-212-108-22.us-west-2.compute.amazonaws.com/model/2018_02_28_22_48_43_ae16dacf5b0efe6985768ab1810f60fe_2018_02_28_22_48_43.obj")
      let idleScene = try! SCNScene(url:url!)
      let node = SCNNode()
      for child in idleScene.rootNode.childNodes {
          node.addChildNode(child)
      }
  </code></pre>