Can I control Reality Composer behaviors in RealityKit? - swift

Question

I would like to make a button using SwiftUI. When the button is pressed, the model will hide. I have already read the tutorial in this link (Creating a Trigger), but I don't know how to control it programmatically.
Here is my code:
struct VocabView : View {
#State private var arView = ARView(frame: .zero)
var body: some View {
ZStack{
ARViewContainer(arView: $arView)
.ignoresSafeArea()
VStack {
Button("hide") {
hide()
}
}
}
}
func hide() {
let demoScene = try! Experience1.loadDemo()
if arView.scene.anchors.count > 0 {
if arView.scene.anchors[0].isAnchored {
demoScene.notifications.hide.post()
}
}
}
}
struct ARViewContainer2: UIViewRepresentable {
#Binding var arView: ARView
func makeUIView(context: Context) -> ARView {
let demoScene = try! Experience1.loadDemo()
DispatchQueue.main.async {
arView.scene.anchors.append(demoScene)
}
return arView
}
}
Here is the configuration in Reality Composer:

Answer 1

You are loading your model twice – at first in makeUIView() method and secondly in hide() method. Try my version.
import SwiftUI
import RealityKit
struct ContentView : View {
#State private var arView = ARView(frame: .zero)
#State private var scene = try! Experience.loadBox()
var body: some View {
ZStack{
ARViewContainer(arView: $arView, scene: $scene)
.ignoresSafeArea()
VStack {
Spacer()
Button("Hide Model") { hideModel() }
}
}
}
private func hideModel() {
if arView.scene.anchors.count > 0 {
if arView.scene.anchors[0].isAnchored {
scene.notifications.notify.post()
}
}
}
}
struct ARViewContainer : UIViewRepresentable {
#Binding var arView: ARView
#Binding var scene: Experience.Box
func makeUIView(context: Context) -> ARView {
arView.scene.anchors.append(scene)
return arView
}
func updateUIView(_ view: ARView, context: Context) { }
}