下载PDF并保存到“文件”在iPhone中，而不是应用程序数据，Swift [英] Download PDF and save to the "Files" in iPhone, not to the app data, Swift

问题描述

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中的Files文件夹中显示下载的pdf。

I tried downloading pdf files with the below code. Here it's storing in the app data. But I need to show the downloaded pdf in "Files" folder in iPhone.

    // 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？

推荐答案

以下是如何下载任何文件并保存到照片（如果图像文件）或文件（如果是pdf）

Here is how to download any files and save to Photos(if image file) or Files (if 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()

这篇关于下载PDF并保存到“文件”在iPhone中，而不是应用程序数据，Swift的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！