Swift 4.2 - Cocoapods: Adding and accessing scnassets in resource_bundles

Question

Attempting to create a cocoapod that utilizes an .scnassets folder. The folder is imported into Resources without any problems with the children objects, but I can't find a way to load the .dae files into an SCNScene. From my understanding there may be a problem with how XCode converts .dae into .scn assets.

.podspec includes:

  s.resource_bundles = {
      'ARUtilsScenes' => ['ARUtils/Assets/ARScenes.scnassets']
   }

which properly loads the ARScenes.scnassets into Resources folder. I'm attempting to load a scene inside of my Pod (inside the pod and not a project that uses the pod, and have tried a variety of methods):

let arrowScene = SCNScene(named: "arrow.dae")

let arrowScene = SCNScene(named: "Resources/ARScenes.scnassets/arrow.dae")

let arrowScene = SCNScene(named: "arrow.dae", inDirectory: "Resources/ARScenes.scnassets", options: nil)

I've tried a variety of file/folder names, and am able to load images but I'm not able to get a .dae loaded as an SCNScene. Do I need to add .xib files to my resource_bundles, or is there some other way to ensure .scnassets folder properly compiles these .dae to .scn as well as make them available for loading into an SCNScene?

Answer 1

Suppose ZARKit is your framework distributed in CocoaPods.

.podspec includes:

s.resource_bundles = {
      'ARUtilsScenes' => ['ARUtils/Assets/ARScenes.scnassets']
   }

then you should do this

let bundle = Bundle(for: #Your Class#.self).
let resourcePath = bundle.path(forResource: <#T##String?#>, ofType: <#T##String?#>)
let resourceBundle = Bundle(path: resourcePath)

let url = resourceBundle.url(forResource: "ARScenes.scnassets/<#YourResourceName-arrow#>", withExtension: "<#scn#>")
let arrowScene = SCNScene(url: url)

---

edit: by Z. Bagley

Accepted answer, but this was the actual code I used:

        // find bundle based on existing class in pod
        let frameworkBundle = Bundle(for: ARUtilsClass.self) //ARUtilsClass is an empty class, Pod is only extensions for existing classes
        // append the scenes bundle, scnassets, and scn/dae
        let arrowURL = frameworkBundle.resourceURL?.appendingPathComponent("ARUtilsScenes.bundle/ARScenes.scnassets/newArrow.scn")
        // create a node in parent
        var arrow = SCNNode()
        do {
            // get arrow scene from bundle
            let bundleArrowScene = try SCNScene(url: (arrowURL)!, options: nil)
            // add arrow node from scene
            arrow = bundleArrowScene.rootNode.childNode(withName: "arrow", recursively: true)!
        } catch {
            print("failed to find arrow resource")
        }