swift - 如何释放 RealityKit ARView()？

Question

我无法发布我的 RealityKit ARView()从内存里。

我知道 ARKit + SceneKit 有(是？)类似的问题——有这样的解决方法:https://stackoverflow.com/a/53919730/7826293
不幸的是，这并没有解决我的问题。

上述解决方案通过手动删除所有“可疑”内容来工作。这正是我在更大范围内所做的:

class ViewController_ARViewMemoryTest: UIViewController {

    var arView: ARView?

    init() {
        super.init(nibName: nil, bundle: nil)
        arView = ARView(frame: .zero)
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    deinit {
        doEverythingThatsNeeded()
    }

    public func doEverythingThatsNeeded() {
        self.arView?.session.pause()
        self.arView?.session.delegate = nil
        self.arView?.removeFromSuperview()
        // Quite a few more removals and resets here, ie. for Combines AnyCancellables
        self.arView = nil
    }

}

我也从外部调用 doEverythingThatsNeeded() :

aRViewMemoryTest?.doEverythingThatsNeeded()
aRViewMemoryTest?.arView = nil
aRViewMemoryTest = nil

这个问题似乎与我在 SwiftUI 中包装了我的 ARView 或 UIViewController 的事实无关 UIViewRepresentable/ UIViewControllerRepresentable .

我相信这一定是一个错误，我几个月前已经提交了一份报告。但是，在 Apple 修复潜在问题之前，我希望有帮助的解决方法。

非常感谢!

Answer 1

如果您使用的是 SwiftUI，请尝试以下代码:

import SwiftUI
import RealityKit

struct ContentView : View {

    var body: some View {
        return ARViewContainer().edgesIgnoringSafeArea(.all)
    }
}

struct ARViewContainer: UIViewRepresentable {

    func updateUIView(_ uiView: ARView,
                       context: UIViewRepresentableContext<ARViewContainer>) {

        uiView.removeFromSuperview()
    }

    func makeUIView(context: Context) -> ARView {

        let arView = ARView(frame: .zero)
        let boxAnchor = try! Experience.loadBox()
        arView.scene.anchors.append(boxAnchor)
        return arView
    }
}

...如果您使用 UIKit，请使用以下代码:

import UIKit
import RealityKit

class ViewController: UIViewController {

    var arView: ARView? = ARView(frame: .zero)

    deinit {
        removingView()
    }

    func addingView() {
        self.arView?.frame = .init(x: 0, y: 0, width: 300, height: 700)
        self.view.addSubview(arView!)
    }

    func removingView() {
        self.arView?.session.pause()
        self.arView?.session.delegate = nil
        self.arView?.scene.anchors.removeAll()
        self.arView?.removeFromSuperview()
        self.arView?.window?.resignKey()
        self.arView = nil
    }

    override func viewDidLoad() {
        super.viewDidLoad()            
        addingView()

        let boxAnchor = try! Experience.loadBox()
        arView?.scene.anchors.append(boxAnchor)

        removingView()
    }
}