Presentations are not currently supported in Volumetric contexts

Question

Created Feb ’24

Replies 4

Boosts 0

Views 1.1k

Participants 4

I'm getting this error in the debugger ("Presentations are not currently supported in Volumetric contexts.") in VisionOS when I try to present an alert in a Volume. What's the correct way to present a modal alert in a volumetric window group? I'm using Xcode 15.3 Beta 3 with Apple Vision Pro (1.1) simulator.

This is also preventing me from using the RevenueCat paywall UI since it also returns this error.

var body: some Scene {
    WindowGroup {
        SheilaAppView()
            .presentPaywallIfNeeded(
                requiredEntitlementIdentifier: "access",
                purchaseCompleted: { customerInfo in
                    print("Purchase completed: \(customerInfo.entitlements)")
                },
                restoreCompleted: { customerInfo in
                    // Paywall will be dismissed automatically if "pro" is now active.
                    print("Purchases restored: \(customerInfo.entitlements)")
                }
            )
    }.windowStyle(.volumetric)
}

Answered by Vision Pro Engineer in 782108022

Presentations are supported from a WindowGroup with a windowStyle of .plain or .automatic. Consider adding a UI affordance to your volumetric window that creates a non-volumetric WindowGroup to present your additional UI.

ImmersiveAlertApp.swift

struct ImmersivePresentationApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView()
        }
        
        WindowGroup(id: "nonVolumetricWindow") {
            SomeView()
                .padding()
        }
        .windowResizability(.contentSize)

        ImmersiveSpace(id: "ImmersiveSpace") {
            ImmersiveView()
        }
    }
}

ImmersiveView.swift

struct ImmersiveView: View {
    @Environment(\.openWindow) var openWindow
    let buttonAttachmentId = "button"
    
    var body: some View {
        RealityView { content, attachments  in
            if let buttonAttachment = attachments.entity(for: buttonAttachmentId) {
                buttonAttachment.position = [0, 1.3, -1.0]
                content.add(buttonAttachment)
            }
        }
        attachments: {
            Attachment(id: buttonAttachmentId){
                Button("Open non-volumetric window"){
                    openWindow(id: "nonVolumetricWindow")
                }
                .glassBackgroundEffect()
            }
        }
    }
}

SomeView.swift

struct SomeView: View {
    @State private var showAlert = false
    var body: some View {
        VStack {
            Text("Look a non-volumetric window.")
            Button("Show alert") {
                showAlert = true
            }
            .alert(isPresented: $showAlert) {
                Alert(
                    title: Text("Lorem ipsum dolor"),
                    message: Text("Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor.")
                )
            }
        }
    }
}

Boost

Answer 1

Vision Pro Engineer OP

Apple

Mar ’24

Recommended

Presentations are supported from a WindowGroup with a windowStyle of .plain or .automatic. Consider adding a UI affordance to your volumetric window that creates a non-volumetric WindowGroup to present your additional UI.

ImmersiveAlertApp.swift

struct ImmersivePresentationApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView()
        }
        
        WindowGroup(id: "nonVolumetricWindow") {
            SomeView()
                .padding()
        }
        .windowResizability(.contentSize)

        ImmersiveSpace(id: "ImmersiveSpace") {
            ImmersiveView()
        }
    }
}

ImmersiveView.swift

struct ImmersiveView: View {
    @Environment(\.openWindow) var openWindow
    let buttonAttachmentId = "button"
    
    var body: some View {
        RealityView { content, attachments  in
            if let buttonAttachment = attachments.entity(for: buttonAttachmentId) {
                buttonAttachment.position = [0, 1.3, -1.0]
                content.add(buttonAttachment)
            }
        }
        attachments: {
            Attachment(id: buttonAttachmentId){
                Button("Open non-volumetric window"){
                    openWindow(id: "nonVolumetricWindow")
                }
                .glassBackgroundEffect()
            }
        }
    }
}

SomeView.swift

struct SomeView: View {
    @State private var showAlert = false
    var body: some View {
        VStack {
            Text("Look a non-volumetric window.")
            Button("Show alert") {
                showAlert = true
            }
            .alert(isPresented: $showAlert) {
                Alert(
                    title: Text("Lorem ipsum dolor"),
                    message: Text("Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor.")
                )
            }
        }
    }
}

1

Answer 2

softwarebyeugene OP

Mar ’24

Thanks. It's a shame that Apple's documentation doesn't call out this limitation. I was hoping it was a bug. :)

0

Answer 3

warpling OP

May ’24

It's strange and inconsistent that requesting permissions can display alerts from volumetric contexts just fine but displaying a purchase screen (or rating prompt) isn't possible without a window. I hope this is improved upon in the future so we don't have to break immersion with windows!

0

Answer 4

pbartolome OP

Jul ’24

This is an issue when for example showing an immersive space that has system SwiftUI entities which can present view, like for example a password textfield with a keyboard which has a "Passwords" button, that button will try to present the Passwords UI and therefore triggering this error

0