Using SwiftUI together with Unity

On visionOS, it is possible to use SwiftUI together with a Unity application built for mixed reality (Immersive Space). The Samples contain a SwiftUI sample that demonstrates one approach.

For detailed information, please review the comments in the following files in the sample:

• SwiftUIDriver.cs
  • A MonoBehaviour that drives the interop with SwiftUI. It uses DllImport to access methods defined in Swift.
• SwiftUISamplePlugin.swift
  • Swift code that interfaces with SwiftUIDriver to provide the ability to pass information back and forth between C# and Swift.
• SwiftUISampleInjectedScene.swift
  • A Swift type that defines a SwiftUI Scene that is injected into the top-level App's Scenes. Swift files ending in ...InjectedScene.swift are automatically injected, removing the need to modify the generated the top-level App.
• HelloWorldContentView.swift
  • A Swift View that is used by the WindowGroup defined in SwiftUISampleInjectedScene. This file is in a directory called SwiftAppSupport. All Swift files under a SwiftAppSupport directory will be made available in the top-level App (instead of UnityFramework in the Xcode project).

By using an approach similar to the sample, you can take advantage of SwiftUI for platform-native UI in separate windows while displaying 3D content from Unity in a volumetric window.

Mixing SwiftUI elements with Unity-managed content in a single volumetric window is not supported.