如何在swift中使用CFURLCreateFromFileSystemRepresentation？

import CoreFoundation

func CFURLCreateFromFileSystemRepresentation(_ allocator: CFAllocator?, _ buffer: UnsafePointer<UInt8>, _ bufLen: CFIndex, _ isDirectory: Bool) -> CFURL?

import CoreFoundation

// 创建文件系统表示的缓冲区
let filePath: String = "/path/to/file.txt"
let fileSystemRepresentation = (filePath as NSString).fileSystemRepresentation

// 创建CFURL对象
let url = CFURLCreateFromFileSystemRepresentation(kCFAllocatorDefault, fileSystemRepresentation, Int(strlen(fileSystemRepresentation)), false)

// 使用CFURL对象
if let url = url {
    // 获取URL的字符串表示
    let urlString = CFURLGetString(url) as String
    print("URL: \(urlString)")
    
    // 获取URL的文件系统路径表示
    let fileSystemPath = CFURLCopyFileSystemPath(url, .cfurlposixPathStyle) as String
    print("File System Path: \(fileSystemPath)")
} else {
    print("Failed to create CFURL object.")
}