How do I use a realityview?

To use a RealityView in visionOS, you can follow these steps:

1. Create a New Project: Start by creating a new Xcode project using the VisionOS app template. This will automatically create a default scene that you can open in Reality Composer Pro.

2. Edit in Reality Composer Pro: Open the default scene in Reality Composer Pro. You can delete the default sphere and create an empty transform entity. Add an anchoring component to this entity, which will serve as the container for your object anchor.

3. Add Virtual Content: You can add various virtual content to your scene using Reality Composer Pro. For example, you can add a video dock preset or other 3D models to your scene. The inspector in Reality Composer Pro allows you to edit properties such as position and rotation of these entities.

4. Implement Object Tracking: To facilitate object tracking, you can introduce a new target named object and associate it with your anchoring component. You can use the RealityKit API to check the entity's isAnchored state and decide what to display in both cases.

5. Add SwiftUI Elements: With RealityView attachments, you can place SwiftUI elements on RealityKit anchor entities. Define the SwiftUI elements in the attachments section under RealityView, and then in the scene setup, find this UI entity and add it as a child node.

For more detailed steps and examples, you can refer to the following sessions from WWDC 2024:

• Explore object tracking for visionOS (09:38)
• Enhance the immersion of media viewing in custom environments (04:02)

These sessions provide comprehensive guidance on using Reality Composer Pro and RealityKit APIs to create and manage immersive experiences in visionOS.