下載后移動文件

Question

我使用解析將一些文件下載到設備上，一切都很好，但是我想將文件從解析存儲它們的默認緩存目錄（/ Library / Caches / PFFileCache /）移動到更穩定的位置，說用戶文檔目錄。

我得到的本地化錯誤是：

Error: “7b54d8a0f1a64b710058d4408ca4d696_The%20Name%20of%20the%20Wind%2029-92.mp3” couldn’t be moved to “Documents” because either the former doesn't exist, or the folder containing the latter doesn't exist.

但是我確信兩者都存在。 這可能與名稱有關，因為當我從PFFile命名名稱時，文件名中沒有編碼的％20。

這是我的代碼塊：

    let cachedPFFile = object.object(forKey: "partAudio") as! PFFile
        print(cachedPFFile)
    let getCachedFilePath = cachedPFFile.getPathInBackground()
        getCachedFilePath.waitUntilFinished()
    let cachedFilePath = getCachedFilePath.result as! String
        print(cachedFilePath)

    let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
    let documentsDirectory = String(describing: paths[0])

    let saveDirectory = documentsDirectory.appending(cachedPFFile.name)

        print(documentsDirectory)
        print(saveDirectory)

    let fileManager = FileManager.default

    if fileManager.fileExists(atPath: saveDirectory) == false {

        do {
            try fileManager.moveItem(atPath: cachedFilePath, toPath: saveDirectory)
            print("Move successful")
        } catch let error {
            print("Error: \(error.localizedDescription)")
        }

    }

這是整個日志：

<PFFile: 0x608000458f00>
2017-02-20 18:42:35.430 ParseStarterProject-Swift[2260:55934] Warning: A long-running operation is being executed on the main thread. 
 Break on warnBlockingOperationOnMainThread() to debug.
/Users/Genie/Library/Developer/CoreSimulator/Devices/A2FB00CE-B018-4FDF-9635-35FD6678DF8D/data/Containers/Data/Application/BA7C112C-BECB-4734-8C67-A9CB84F0E1F3/Library/Caches/Parse/PFFileCache/7b54d8a0f1a64b710058d4408ca4d696_The%20Name%20of%20the%20Wind%2029-92.mp3
file:///Users/Genie/Library/Developer/CoreSimulator/Devices/A2FB00CE-B018-4FDF-9635-35FD6678DF8D/data/Containers/Data/Application/BA7C112C-BECB-4734-8C67-A9CB84F0E1F3/Documents/
file:///Users/Genie/Library/Developer/CoreSimulator/Devices/A2FB00CE-B018-4FDF-9635-35FD6678DF8D/data/Containers/Data/Application/BA7C112C-BECB-4734-8C67-A9CB84F0E1F3/Documents/7b54d8a0f1a64b710058d4408ca4d696_The Name of the Wind 29-92.mp3
Error: “7b54d8a0f1a64b710058d4408ca4d696_The%20Name%20of%20the%20Wind%2029-92.mp3” couldn’t be moved to “Documents” because either the former doesn't exist, or the folder containing the latter doesn't exist.

我對此感到困惑，因為文件和新目錄都存在？

盡管我不確定“ file：/// Users”，因為它在finder中不起作用，但必須使用真實路徑“ / Users”，我如何才能從“開始”中刪除“ file：//”串？？

另外，我一直在搜索SO，但沒有運氣如何在文件名的空格中添加％20，似乎沒有一個顯而易見的選項起作用。

Answer 1

您有線程問題。 您對“ waitUntilFinished”的整個想法是錯誤的。 您不能阻塞主線程，並且會收到警告告知您。 聽那個警告！

不要調用getFilePathInBackground ，也不要等待下載完成。 而是調用getFileInBackgroundWithBlock:然后在塊內繼續執行其余代碼，即移動文件。