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下载PDF并保存到iPhone中的“文件”,而不是应用程序数据,Swift

download pdf file swift ios

Rashid KC · 技术社区 · 6 年前

我试着用下面的代码下载pdf文件。在这里,它存储在应用程序中的数据。但我需要在 “文件” iPhone中的文件夹。

    // 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()

有可能吗??

1 回复 | 直到 6 年前

Rashid KC 6 年前

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..<contents.count {
                        if contents[indexx].lastPathComponent == destinationFileUrl.lastPathComponent {
                            let activityViewController = UIActivityViewController(activityItems: [contents[indexx]], applicationActivities: nil)
                            self.present(activityViewController, animated: true, completion: nil)
                        }
                    }
                }
                catch (let err) {
                    print("error: \(err)")
                }
            } 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()