Swift 在 RealityKit 中查找特定模型的 findEntity(named：) 方法的替代方法

所以我几天前问了一个问题，哪个安迪爵士好心answered分.所以我一直在玩弄答案，虽然我能够实现一个解决方案，但它是不完整的，因为他使用的方法是使用RealityKit的findEntity(named:).而我用现实composer 来回答我自己的问题.

Problem #1: 100 method doesn't work on Reality Composer when you have multiple objects.所以我意识到使用findEntity(名:)方法不起作用.因为场景中的所有对象都被命名为"simpBld_root"，所以无法触发我想要触发的内容.

Problem #2: When using the parenting notation, I am doing a trial and error because I don't really understand what is what.个 我如何调用每个对象？这也是我自己不能正确理解从现实composer 那里调用什么的结果，因为我不认为我真的理解父母符号在现实composer 中是如何应用的.下面的图片是我在控制台上打印的工作场景.

下面是我制作的一个示例，其中我使用了Child[0]，而不是Andy的findEntity解决方案(名为:)

以下是我在使用findEntity()方法时try 的代码，但该方法不起作用:

let redBoardModelEntity =  cubesAnchor.redBoard?.findEntity(named: "simpBld_root") as! ModelEntity
let greenCubeModelEntity =  cubesAnchor.greenCube?.findEntity(named: "simpBld_root") as! ModelEntity
let blueCubeModelEntity =  cubesAnchor.blueCube?.findEntity(named: "simpBld_root") as! ModelEntity

这就是我最终得到的，起作用的，也就是说，它显示了所有的物体和整个东西被拖在一起.[见下面的图片，后跟代码]

import UIKit
import RealityKit

class ViewController: UIViewController {
    @IBOutlet var arView: ARView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
                
        let boxAnchor = try! Experience.loadBox()
        arView.scene.anchors.append(boxAnchor)            
    
        let cubesAnchor = try! Experience.loadCubes()
        arView.scene.anchors.append(cubesAnchor)
        print (cubesAnchor)
        cubesAnchor.actions.behavior.onAction = handleTapOnEntity(_:)            
        
        let redModel =  cubesAnchor.children[0].children[0]
                  
        let group = ModelEntity() as ModelEntity & HasCollision
        group.addChild(redModel)
        // group.addChild(blueCubeModelEntity)
        // group.addChild(greenCubeModelEntity)
        
        group.generateCollisionShapes(recursive: false)
        self.arView.installGestures(.all, for: group)
        
        let shape = ShapeResource.generateBox(width: 1, height: 1, depth: 1)
        let collision = CollisionComponent(shapes: [shape],
                                             mode: .trigger,                                               
                                           filter: .sensor)
        group.components.set(collision)
        
        let anchor = AnchorEntity()
        anchor.addChild(group)
        anchor.scale = [5,5,5]
        arView.scene.anchors.append(anchor)            
        
        DispatchQueue.main.asyncAfter(deadline: .now() + 2.0){
            // self.arView.scene.anchors.removeAll()
            let coneAnchor = try! Experience.loadCone()
            self.arView.scene.anchors.append(coneAnchor)
            coneAnchor.actions.behavior.onAction = handleTapOnEntity(_:)                    
            // print(cubesAnchor)                
        }                          
        
        boxAnchor.actions.behavior.onAction = handleTapOnEntity(_:)
            
        func handleTapOnEntity(_ entity: Entity?){
            guard let entity = entity else { return }
            
           // self.myEntity = entity
           // self.myEntity?.isEnabled = false    
        }            
    }
}