Swift 用户输入以更改通过点击生成的形状大小

我正在RealityKit中创建一个应用程序，它根据用户输入生成形状.例如，如果用户输入的半径为0.1米，形状(在我的例子中为球体)的半径将为0.1米，0.2、0.3等的逻辑相同.代码都可以工作，但我想让它在用户点击屏幕时显示球体.

以下是我为接受用户输入的页面编写的代码:

class UserInput: ObservableObject {
    @Published var score: Float = 0.0
}


struct PreviewView: View {
    @ObservedObject var input = UserInput()
    var body: some View {
        NavigationView {
            ZStack {
                Color.black
            
            VStack {
                Text("Change the radius of your AR sphere")
                    .foregroundColor(.white)
                Text("\(String(format: "%.1f", self.input.score)) meters")
                    .foregroundColor(.white)
                    .bold()
                    .font(.title)
                    .padding(10)
                Button(action: {self.input.score += 0.1})
                    {
                        Text("Increment by 0.1 meters")
                    }
                    .padding(10)
                
                Button(action: {self.input.score -= 0.1})
                    {
                        Text("Decrease by 0.1 meters")
                    }
                    .padding(10)
                NavigationLink(destination: Reality(input: self.input)) {
                    Text("View in AR")
                        .bold()
                        .padding(.top,30)
                }
            }
        }
        .ignoresSafeArea()
    }
}

以下是Reality ARView的代码:

struct Reality: UIViewRepresentable {
    @ObservedObject var input: UserInput
    func makeUIView(context: Context) -> ARView {
        let arView = ARView(frame: .zero)
        let model = ModelEntity(mesh: .generateSphere(radius: input.score))
        let anchor = AnchorEntity(plane: .horizontal)
        anchor.addChild(model)
        arView.scene.anchors.append(anchor)
        return arView
    }
    func updateUIView(_ uiView: ARView, context: Context) {}
}

当用户touch 屏幕时生成形状的例子有很多，这不是我的问题.我正在接受用户输入的事实使这一点变得困难.

以下是一些代码，它们可以执行我想要的操作，但不需要用户输入.它有一些内置的物理特性，我计划在用户输入开始工作后实现这些特性.

struct ARViewContainer: UIViewRepresentable {
    
    func makeUIView(context: Context) -> ARView {
        
        let arView = ARView(frame: .zero)
        
        let planeAnchorEntity = AnchorEntity(plane: .horizontal)
        let plane = ModelEntity(mesh: MeshResource.generatePlane(width: 1, depth: 1), materials: [SimpleMaterial(color: .white, isMetallic: true)])
        plane.physicsBody = PhysicsBodyComponent(massProperties: .init(mass: 1), material: .generate(friction: 1, restitution: 1), mode: .kinematic)
        plane.generateCollisionShapes(recursive: true)
        
        planeAnchorEntity.addChild(plane)
        arView.scene.anchors.append(planeAnchorEntity)
        
        arView.installGestures([.scale,.rotation], for: plane)
        arView.addGestureRecognizer(UITapGestureRecognizer(target: context.coordinator, action: #selector(Coordinator.handleTap)))
        
        context.coordinator.view = arView
        
        return arView
    }
    
    func makeCoordinator() -> Coordinator {
        Coordinator()
    }
    
    func updateUIView(_ uiView: ARView, context: Context) {}
}

下面是生成我想要在大小上可调的框的协调器类:

class Coordinator {
    
    weak var view: ARView?
    
    @objc func handleTap(_ recognizer: UITapGestureRecognizer) {
        
        guard let view = view else { return }
        let location =  recognizer.location(in: view)
        
        let results = view.raycast(from: location, allowing: .estimatedPlane, alignment: .horizontal)
        
        if let result = results.first {
            
           let anchorEntity = AnchorEntity(raycastResult: result)
            let box = ModelEntity(mesh: MeshResource.generateBox(size: 0.3),materials: [SimpleMaterial(color: .black, isMetallic: true)])
            box.physicsBody = PhysicsBodyComponent(massProperties: .init(mass: 0.5), material: .generate(), mode: .dynamic)
            box.generateCollisionShapes(recursive: true)
            
            box.position = simd_make_float3(0,0.7,0)
            //static means body cannot be moved
            //dynamic means it can move
            //kinematic means user moved the object
            anchorEntity.addChild(box)
            view.scene.anchors.append(anchorEntity)
        }
    }
}

我试着将这两个项目融合成我想要的，但我得到了各种各样的错误，我不知道如何修复，当我try 新的东西时，出现了一堆其他错误.我认为这可以归结为@ObservedObject，以及我有多个类/ struct 将我的项目与用户输入进行比较的事实.用户输入将进入协调器类，但最终是ARViewContainer实际呈现视图.

如果有人能帮我，我将不胜感激.