Извлечение сцены Reality Composer для ARQuickLook

От Apple Создание 3D-контента с помощью Reality Composer документ:

You can also save your composition to a .reality file for use as a lightweight AR Quick Look experience in your app or on the web. This allows users to place and preview content in the real world to get a quick sense of what it’s like.

To create a Reality file, choose File > Export > Export Project in the Reality Composer menu, and provide a name for the file. You use the Reality file that gets stored to disk just like you would use a USDZ file, as described in Previewing a Model with AR Quick Look.

Во время сборки Xcode компилирует ваш .rcproject в .reality файл, а AR Quick Look принимает элементы предварительного просмотра типа .reality. Вот пример, который использует AR Quick Look для предварительного просмотра Experience.rcproject, взятого из примера кода Apple Столешница SwiftStrike:

import UIKit
import QuickLook
import ARKit


class ViewController: UIViewController, QLPreviewControllerDataSource {

    override func viewDidAppear(_ animated: Bool) {
        let previewController = QLPreviewController()
        previewController.dataSource = self
        present(previewController, animated: true, completion: nil)
    }

    func numberOfPreviewItems(in controller: QLPreviewController) -> Int { return 1 }

    func previewController(_ controller: QLPreviewController, previewItemAt index: Int) -> QLPreviewItem {
        guard let path = Bundle.main.path(forResource: "Experience", ofType: "reality") else { fatalError("couldn't find the rcproject file.") }
        let url = URL(fileURLWithPath: path)
        let item = ARQuickLookPreviewItem(fileAt: url)
        return item
    }    
}