如何在swift中创建iCal事件并下载/导出.ics文件中的事件。我想要iPhone中的文件中的文件

import EventKit

let eventStore = EKEventStore()

// 请求访问日历权限
eventStore.requestAccess(to: .event) { (granted, error) in
    if granted && error == nil {
        let event = EKEvent(eventStore: eventStore)
        event.title = "My Event"
        event.startDate = Date()
        event.endDate = Date().addingTimeInterval(3600) // 事件持续1小时
        event.location = "Event Location"
        
        // 添加事件到日历
        event.calendar = eventStore.defaultCalendarForNewEvents
        
        do {
            try eventStore.save(event, span: .thisEvent)
            print("Event saved successfully.")
        } catch {
            print("Failed to save event with error: \(error.localizedDescription)")
        }
    } else {
        print("Access to calendar not granted.")
    }
}

let eventIdentifier = event.calendarItemIdentifier

// 根据标识符获取事件对象
let savedEvent = eventStore.event(withIdentifier: eventIdentifier)

if let savedEvent = savedEvent {
    do {
        // 创建日历文件导出器
        let exporter = EKEventExporter(eventStore: eventStore)
        let filePath = "path/to/save/ics/file.ics"
        
        // 导出事件为.ics文件
        try exporter.export(savedEvent, to: .file, with: nil, at: URL(fileURLWithPath: filePath))
        
        print("Event exported successfully.")
    } catch {
        print("Failed to export event with error: \(error.localizedDescription)")
    }
} else {
    print("Event not found.")
}

let fileURL = URL(fileURLWithPath: filePath)

let session = URLSession.shared
let task = session.downloadTask(with: fileURL) { (tempLocalURL, response, error) in
    if let tempLocalURL = tempLocalURL, error == nil {
        let documentsDirectoryURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
        let destinationURL = documentsDirectoryURL.appendingPathComponent(fileURL.lastPathComponent)
        
        do {
            // 将文件移动到Documents目录
            try FileManager.default.moveItem(at: tempLocalURL, to: destinationURL)
            print("File downloaded/exported successfully. Destination URL: \(destinationURL)")
        } catch {
            print("Failed to move file with error: \(error.localizedDescription)")
        }
    } else {
        print("Failed to download/export file with error: \(error?.localizedDescription ?? "")")
    }
}

task.resume()