我正在 SwiftUI 应用程序中使用 researchkit 进行一项研究。每次我调用研究工具包任务时，应用程序都会崩溃并显示以下错误：

*** 由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因：“-[SwiftUI.AppDelegate 窗口]：无法识别的选择器发送到实例 0x600000c511c0” 以 NSException 类型的未捕获异常终止

我目前有一些时间调试。代码如下：

struct activityView: UIViewControllerRepresentable {
var activity: activity
var onCompleted: (Bool) -> Void

func makeUIViewController(context: Context) -> ORKTaskViewController {
    let result: ORKTaskViewController
    switch activity {
    case .survey:
        result = ORKTaskViewController(task: StudyTasks.surveyTask,taskRun: NSUUID() as UUID)
    
    case .microphone:
        result = ORKTaskViewController(task: StudyTasks.microphonetask,taskRun: NSUUID() as UUID)
        
        do {
            let defaultFileManager = FileManager.default
            
            // Identify the documents directory.
            let documentsDirectory = try defaultFileManager.url(for: .documentDirectory,in: .userDomainmask,appropriateFor: nil,create: false)
            
            // Create a directory based on the `taskRunUUID` to store output from the task.
            let outputDirectory = documentsDirectory.appendingPathComponent(result.taskRunUUID.uuidString)
            try defaultFileManager.createDirectory(at: outputDirectory,withIntermediateDirectories: true,attributes: nil)
            
            result.outputDirectory = outputDirectory
        } catch let error as NSError {
            fatalError("The output directory for the task with UUID: \(result.taskRunUUID.uuidString) could not be created. Error: \(error.localizedDescription)")
        }
        
    case .tapping:
        result = ORKTaskViewController(task: StudyTasks.tappingTask,taskRun: NSUUID() as UUID)
    
    case .trailmaking:
        result = ORKTaskViewController(task: StudyTasks.trailmakingTask,taskRun: NSUUID() as UUID)
    }
    result.view.window?.tintColor = UIColor(named: "accentColor")
    return result
}

func updateUIViewController(_ uiViewController: ORKTaskViewController,context: Context) {
    uiViewController.delegate = context.coordinator
}

func makeCoordinator() -> Coordinator {
    Coordinator(onCompleted: onCompleted)
}

class Coordinator: NSObject,ORKTaskViewControllerDelegate {
    var onCompleted: (Bool) -> Void

    init(onCompleted: @escaping (Bool) -> Void) {
        self.onCompleted = onCompleted
    }

    public func taskViewController(_ taskViewController: ORKTaskViewController,didFinishWith reason: ORKTaskViewControllerFinishReason,error: Error?) {
        self.onCompleted(reason == .completed)
    }
    
    func taskViewController(_ taskViewController: ORKTaskViewController,viewControllerFor step: ORKStep) -> ORKStepViewController? {
        return nil
    }
}

}