Here is the code snippets.
struct RealityViewTestView: View {
@State private var texts: [String] = []
var body: some View {
RealityView { content, attachments in
} update: { content, attachments in
for text in texts {
if let textEntity = attachments.entity(for: text) {
textEntity.position.x = Float.random(in: -0.1...0.1)
content.add(textEntity)
}
}
} attachments: {
ForEach(texts, id: \.self) { text in
Attachment(id: text) {
Text(text)
.padding()
.glassBackgroundEffect()
}
}
}
.toolbar {
ToolbarItem {
Button("Add") {
texts.append(String(UUID().uuidString.prefix(6)))
}
}
ToolbarItem {
Button("Remove") {
texts.remove(at: Int.random(in: 0..<texts.count))
}
}
}
}
}
struct RealityViewTestView: View {
@State private var texts: [String] = []
@State private var entities: [Entity] = []
var body: some View {
RealityView { content, attachments in
} update: { content, attachments in
// for text in texts {
// if let textEntity = attachments.entity(for: text) {
// textEntity.position.x = Float.random(in: -0.1...0.1)
// content.add(textEntity)
// }
// }
for entity in entities {
content.add(entity)
}
} attachments: {
ForEach(texts, id: \.self) { text in
Attachment(id: text) {
Text(text)
.padding()
.glassBackgroundEffect()
}
}
}
.toolbar {
ToolbarItem {
Button("Add") {
//texts.append(String(UUID().uuidString.prefix(6)))
let m = ModelEntity(mesh: .generateSphere(radius: 0.1), materials: [SimpleMaterial(color: .white, isMetallic: false)])
m.position.x = Float.random(in: -0.2...0.2)
entities.append(m)
}
}
ToolbarItem {
Button("Remove") {
//texts.remove(at: Int.random(in: 0..<texts.count))
entities.removeLast()
}
}
}
}
}
About the first code snippet, when I remove an element from the texts, why content can automatically remove the corresponding entity? And about the second code snippet, content do not automatically remove the corresponding entity. I am very curious.
NahtanMak
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Post
Replies
Boosts
Views
Activity
When using ARView of RealityKit, I can code like this let results = arView.raycast(from: point, allowing: .estimatedPlane, alignment: .any) to get the 3D position of where I tap on the plane. In iOS 18, we can use RealityView and I found that unproject(_:from:to:ontoPlane:) may implement the same function, but I don't know how to set the ontoPlane parameter.
Can someone help me with some code snippets?
Here is a code snippet about AVPlayer.
avPlayer.addPeriodicTimeObserver(forInterval: CMTime(value: 1, timescale: 60), queue: .main) { [weak self] _ in
// Call main actor-isolated instance methods
}
Xcode shows warnings that Call to main actor-isolated instance method '***' in a synchronous nonisolated context; this is an error in the Swift 6 language mode. How can I fix this?
avPlayer.addPeriodicTimeObserver(forInterval: CMTime(value: 1, timescale: 60), queue: .main) { [weak self] _ in
Task { @MainActor in
// Call main actor-isolated instance methods
}
}
Can I use this solution above? But it seems switching actors frequently can slow down performance.
I like the roundedBorder style, but I want to make it more round like a capsule. How to do this?
If I got a file or a file URL, how to judge it is a spatial photo, a panorama photo or a spatial video? Apple's Photo app can do it.
I want to create a ModelEntity that can glow like lightsaber in Star wars. Here is the video
https://x.com/devtom7/status/1819743159213031453/
I found that the app AirDraw can export users' draw scenes to a USDZ file. So how can I implement this function using RealityKit?