下载PDF并保存到iPhone中的“文件”，而不是应用程序数据Swift

我尝试使用以下代码下载pdf文件。 它存储在应用数据中。 但是我需要在iPhone的“Files”文件夹中显示下载的pdf。

// Create destination URL let documentsUrl:URL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first as URL! let destinationFileUrl = documentsUrl.appendingPathComponent("downloadedFile.jpg") //Create URL to the source file you want to download let fileURL = URL(string: "http://swift-lang.org/guides/tutorial.pdf") let sessionConfig = URLSessionConfiguration.default let session = URLSession(configuration: sessionConfig) let request = URLRequest(url:fileURL!) let task = session.downloadTask(with: request) { (tempLocalUrl, response, error) in if let tempLocalUrl = tempLocalUrl, error == nil { // Success if let statusCode = (response as? HTTPURLResponse)?.statusCode { print("Successfully downloaded. Status code: \(statusCode)") } do { try FileManager.default.copyItem(at: tempLocalUrl, to: destinationFileUrl) } catch (let writeError) { print("Error creating a file \(destinationFileUrl) : \(writeError)") } } else { print("Error took place while downloading a file. Error description: %@", error?.localizedDescription ?? ""); } } task.resume() 

可能吗？？

Answer 1

以下是如何下载任何文件并保存到照片（如果是图像文件）或文件（如果是pdf）

 let urlString = "your file url" let url = URL(string: urlString) let fileName = String((url!.lastPathComponent)) as NSString // Create destination URL let documentsUrl:URL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first as URL! let destinationFileUrl = documentsUrl.appendingPathComponent("\(fileName)") //Create URL to the source file you want to download let fileURL = URL(string: urlString) let sessionConfig = URLSessionConfiguration.default let session = URLSession(configuration: sessionConfig) let request = URLRequest(url:fileURL!) let task = session.downloadTask(with: request) { (tempLocalUrl, response, error) in if let tempLocalUrl = tempLocalUrl, error == nil { // Success if let statusCode = (response as? HTTPURLResponse)?.statusCode { print("Successfully downloaded. Status code: \(statusCode)") } do { try FileManager.default.copyItem(at: tempLocalUrl, to: destinationFileUrl) do { //Show UIActivityViewController to save the downloaded file let contents = try FileManager.default.contentsOfDirectory(at: documentsUrl, includingPropertiesForKeys: nil, options: .skipsHiddenFiles) for indexx in 0..