在SwiftUI+RealityKit中调用AR Quick Look的方法？

在SwiftUI+RealityKit中，我通过WindowGroup成功调出AR Quick Look，但是无法将其关闭。如何才能关闭AR Quick Look？

WindowGroup：

import SwiftUI

struct ARQuickLookApp: App {
    var body: some Scene {
        WindowGroup {
            Content1View()
        }
    }
}

AR Quick Look：

import SwiftUI
import QuickLook
import RealityKit
import ARKit


struct Content1View: View {
    var body: some View {
        ARQLView1Controller()
    }
}

struct ARQLView1Controller: UIViewControllerRepresentable {
    func makeUIViewController(context: Context) -> some UIViewController {
        return UINavigationController.init(rootViewController: View1Controller())
    }
    func updateUIViewController(_ uiViewController: UIViewControllerType, context: Context) {
    }
}

class View1Controller: 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: "U1CrystalCell", ofType: "reality") else { fatalError("Couldn't find the supported input file.") }
        let url = URL(fileURLWithPath: path)
        return url as QLPreviewItem
    }
}