切换到iOS 16的最低部署目标应该可以解决这个问题，因为根据https://developer.apple.com/documentation/avfoundation/capture_setup/accessing_the_camera_while_multitasking，这些要求已经被删除
文档并不完全准确，因为它只适用于具有舞台管理器可用的iPad。
下面是一个示例应用程序：

import Foundation
import AVKit

/// Camera Permission Check
/// Requires iPad with Stage Manager Support
/// e.g. iPad Pro (11-inch) 4th generation with iOS 16.1
///
/// Containing app must have iOS deployment target 16.0
class CameraPermissionCheck {
    
    let captureSession = AVCaptureSession()
    init() {
        // Configure the capture session.
        captureSession.beginConfiguration()
        if captureSession.isMultitaskingCameraAccessSupported {
            // Enable using the camera in multitasking modes.
            captureSession.isMultitaskingCameraAccessEnabled = true
            print("MultiTasking Camera Access Enabled")
        }
        captureSession.commitConfiguration()

        // Start the capture session.
        DispatchQueue.global().async {
            self.captureSession.startRunning()
        }
    }
}

它将向控制台打印MultiTasking Camera Access Enabled。