iOS Swift 3 以编程方式将文件复制到 iCloud Drive [英] iOS Swift 3 Copy File to iCloud Drive Programatically

问题描述

我有文档下载选项.当用户从我的应用程序下载文档时，我需要将其存储到已安装在用户移动设备中的用户 iCloud Drive.我已经在 web 和 Xcode 中配置了 iCloud，但问题是我无法正确地将文件复制到 iCloud Drive.文件已成功下载，也已移至 iCloud，但文件不会出现在 iCloud Drive 应用程序中.这是我尝试过的代码:

In my I'm having documents download option. When users downloading documents from my app I need to store it to users iCloud Drive which was install in users mobile already. I have configured iCloud in both web and in Xcode, but problem is I'm not able to copy files to iCloud Drive correctly. File was downloaded successfully, and also it moving to iCloud but files won't appearing in iCloud Drive App. Here is my tried code:

<key>NSUbiquitousContainers</key>
    <dict>
        <key>iCloud.MyAppBundleIdentifier</key>
        <dict>
            <key>NSUbiquitousContainerIsDocumentScopePublic</key>
            <true/>
            <key>NSUbiquitousContainerName</key>
            <string>iCloudDriveDemo</string>
            <key>NSUbiquitousContainerSupportedFolderLevels</key>
            <string>Any</string>
        </dict>
    </dict>

这是我的 iCloud 存储代码:

And Here is My iCloud Storage Code:

func DownloadDocumnt()
    {
        print("Selected URL: (self.SelectedDownloadURL)")
        let fileURL = URL(string: "(self.SelectedDownloadURL)")!

        let documentsUrl:URL =  FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first as URL!
        let destinationFileUrl = documentsUrl.appendingPathComponent("Libra-(self.SelectedDownloadFileName)")

        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
            {
                if let statusCode = (response as? HTTPURLResponse)?.statusCode
                {
                    print("Successfully downloaded. Status code: (statusCode)")
                }
                do
                {
                    if(FileManager.default.fileExists(atPath: destinationFileUrl.path))
                    {
                        try FileManager.default.removeItem(at: destinationFileUrl)
                        try FileManager.default.copyItem(at: tempLocalUrl, to: destinationFileUrl)
                    }
                    else
                    {
                        try FileManager.default.copyItem(at: tempLocalUrl, to: destinationFileUrl)
                    }

                    if let iCloudDocumentsURL = FileManager.default.url(forUbiquityContainerIdentifier: nil)?.appendingPathComponent("Documents")
                    {

                        if(!FileManager.default.fileExists(atPath: iCloudDocumentsURL.path, isDirectory: nil))
                        {
                            try FileManager.default.createDirectory(at: iCloudDocumentsURL, withIntermediateDirectories: true, attributes: nil)
                        }
                    }

                    let iCloudDocumentsURL = FileManager.default.url(forUbiquityContainerIdentifier: nil)?.appendingPathComponent("Documents").appendingPathComponent("Libra-(self.SelectedDownloadFileName)")

                    if let iCloudDocumentsURL = iCloudDocumentsURL
                    {
                        var isDir:ObjCBool = false
                        if(FileManager.default.fileExists(atPath: iCloudDocumentsURL.path, isDirectory: &isDir))
                        {
                            try FileManager.default.removeItem(at: iCloudDocumentsURL)
                            try FileManager.default.copyItem(at: tempLocalUrl, to: iCloudDocumentsURL)
                        }
                        else
                        {
                            try FileManager.default.copyItem(at: destinationFileUrl, to: iCloudDocumentsURL)
                        }
                    }

                }
                catch (let writeError)
                {
                    print("Error creating a file (destinationFileUrl) : (writeError)")
                }
            }
            else
            {
                print("Error took place while downloading a file. Error description");
            }
        }
        task.resume()
    }

推荐答案

当我遇到这个问题时最有用的文章之一是在以下链接:

One of the most useful articles when I was having this issue was at the following link:

技术问答 QA1893 更新 iCloud Drive 的 iCloud 容器元数据

我还非常小心地删除并重新添加了我的 info.plist 条目.这似乎是有效的.我最初从在线资源中复制并粘贴了条目.似乎密钥不完全正确或包含一些导致它们无法识别的隐藏字符.

I also deleted and re-added my info.plist entries VERY CAREFULLY. That is what seemed to work. I originally copied and pasted the entries from an online resource. It seems that the keys were not exactly correct or contained some hidden characters which caused them not to be recognized.

在 iCloud Drive 中启用文档存储

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