从 Document 目录中的目录中删除文件？

Question

我创建了一个临时目录来存储一些文件：

//MARK: -create save delete from directory
func createTempDirectoryToStoreFile(){
    var error: NSError?
    let paths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)
    let documentsDirectory: AnyObject = paths[0]
    tempPath = documentsDirectory.stringByAppendingPathComponent("Temp")

    if (!NSFileManager.defaultManager().fileExistsAtPath(tempPath!)) {

        NSFileManager.defaultManager() .createDirectoryAtPath(tempPath!, withIntermediateDirectories: false, attributes: nil, error: &error)
   }
}

没关系，现在我想删除目录中的所有文件...我试过如下：

func clearAllFilesFromTempDirectory(){

    var error: NSErrorPointer = nil
    let dirPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as! String
    var tempDirPath = dirPath.stringByAppendingPathComponent("Temp")
    var directoryContents: NSArray = fileManager.contentsOfDirectoryAtPath(tempDirPath, error: error)!

    if error == nil {
        for path in directoryContents {
            let fullPath = dirPath.stringByAppendingPathComponent(path as! String)
            let removeSuccess = fileManager.removeItemAtPath(fullPath, error: nil)
        }
    }else{

        println("seomthing went worng \(error)")
    }
}

我注意到文件仍然存在...我做错了什么？

Answer 1

两件事，使用 temp 目录，然后将错误传递给 fileManager.removeItemAtPath 并将其放在 if 中以查看失败的原因。此外，您不应该检查是否设置了错误，而是检查方法是否具有 return 数据。

func clearAllFilesFromTempDirectory(){

    var error: NSErrorPointer = nil
    let dirPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as! String
    var tempDirPath = dirPath.stringByAppendingPathComponent("Temp")
    var directoryContents: NSArray = fileManager.contentsOfDirectoryAtPath(tempDirPath, error: error)?

    if directoryContents != nil {
        for path in directoryContents {
            let fullPath = dirPath.stringByAppendingPathComponent(path as! String)
            if fileManager.removeItemAtPath(fullPath, error: error) == false {
                println("Could not delete file: \(error)")
            }
        }
    } else {
        println("Could not retrieve directory: \(error)")
    }
}

要获得正确的临时目录，请使用 NSTemporaryDirectory()

Answer 2

如果有人需要最新的 Swift / Xcode 版本：这里是一个从临时文件夹中删除所有文件的示例：

Swift 2.x:

func clearTempFolder() {
    let fileManager = NSFileManager.defaultManager()
    let tempFolderPath = NSTemporaryDirectory()
    do {
        let filePaths = try fileManager.contentsOfDirectoryAtPath(tempFolderPath)
        for filePath in filePaths {
            try fileManager.removeItemAtPath(tempFolderPath + filePath)
        }
    } catch {
        print("Could not clear temp folder: \(error)")
    }
}

Swift 3.x 和 Swift 4:

func clearTempFolder() {
    let fileManager = FileManager.default
    let tempFolderPath = NSTemporaryDirectory()
    do {
        let filePaths = try fileManager.contentsOfDirectory(atPath: tempFolderPath)
        for filePath in filePaths {
            try fileManager.removeItem(atPath: tempFolderPath + filePath)
        }
    } catch {
        print("Could not clear temp folder: \(error)")
    }
}

Answer 3

Swift 3:

 func clearTempFolder() {
    let fileManager = FileManager.default
    let tempFolderPath = NSTemporaryDirectory()

    do {
        let filePaths = try fileManager.contentsOfDirectory(atPath: tempFolderPath)
        for filePath in filePaths {
            try fileManager.removeItem(atPath: NSTemporaryDirectory() + filePath)
        }
    } catch let error as NSError {
        print("Could not clear temp folder: \(error.debugDescription)")
    }
}

Answer 4

Swift 4.0 示例从文档目录中的示例文件夹“diskcache”中删除所有文件。我发现上面的示例不清楚，因为它们使用了 NSTemporaryDirectory() + filePath 而不是 "url" 样式。为了您的方便：

    func clearDiskCache() {
        let fileManager = FileManager.default
        let myDocuments = fileManager.urls(for: .documentDirectory, in: .userDomainMask).first!
        let diskCacheStorageBaseUrl = myDocuments.appendingPathComponent("diskCache")
        guard let filePaths = try? fileManager.contentsOfDirectory(at: diskCacheStorageBaseUrl, includingPropertiesForKeys: nil, options: []) else { return }
        for filePath in filePaths {
            try? fileManager.removeItem(at: filePath)
        }
    }

Answer 5

使用文件

https://github.com/JohnSundell/Files

    do {
        for folder:Folder in (FileSystem().documentFolder?.subfolders)! {
            try folder.delete()
        }
    } catch _ {
        print("Error")
    }

Answer 6

在文档目录中创建临时文件夹 (Swift 4)

func getDocumentsDirectory() -> URL {
        //        let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
        //        return paths[0]

        let fileManager = FileManager.default
        if let tDocumentDirectory = fileManager.urls(for: .documentDirectory, in: .userDomainMask).first {
            let filePath =  tDocumentDirectory.appendingPathComponent("MY_TEMP")
            if !fileManager.fileExists(atPath: filePath.path) {
                do {
                    try fileManager.createDirectory(atPath: filePath.path, withIntermediateDirectories: true, attributes: nil)
                } catch {
                    NSLog("Couldn't create folder in document directory")
                    NSLog("==> Document directory is: \(filePath)")
                    return fileManager.urls(for: .documentDirectory, in: .userDomainMask).first!
                }
            }

            NSLog("==> Document directory is: \(filePath)")
            return filePath
        }
        return fileManager.urls(for: .documentDirectory, in: .userDomainMask).first!
    }

从临时目录中删除文件：(Swift 4)

func clearAllFilesFromTempDirectory(){        
        let fileManager = FileManager.default
        do {
            let strTempPath = getDocumentsDirectory().path
            let filePaths = try fileManager.contentsOfDirectory(atPath: strTempPath)
            for filePath in filePaths {
                try fileManager.removeItem(atPath: strTempPath + "/" + filePath)
            }
        } catch {
            print("Could not clear temp folder: \(error)")
        }
    }

Answer 7

从文档目录中删除所有文件：Swift 4

func clearAllFile() {
    let fileManager = FileManager.default
    let myDocuments = fileManager.urls(for: .documentDirectory, in: .userDomainMask).first!
    do {
        try fileManager.removeItem(at: myDocuments)
    } catch {
        return
    }
}

Answer 8

经过研究，我找到了这个完美的解决方案，

您可以删除所有文件和文件夹，这将跳过隐藏文件（例如，.DS_Store）

func clearCache(){
    let fileManager = FileManager.default
    do {
        let documentDirectoryURL = try fileManager.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: false)
        let fileURLs = try fileManager.contentsOfDirectory(at: documentDirectoryURL, includingPropertiesForKeys: nil, options: .skipsHiddenFiles)
        for url in fileURLs {
           try fileManager.removeItem(at: url)
        }
    } catch {
        print(error)
    }
}

Answer 9

从应用文档文件夹中删除文件的简单功能。

func removeItem(_ relativeFilePath: String) {
    guard let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first else { return }
    let absoluteFilePath = documentsDirectory.appendingPathComponent(relativeFilePath)
    try? FileManager.default.removeItem(at: absoluteFilePath)
}

用法：

removeItem("path/to/file.txt")

从 Document 目录中的目录中删除文件？

Delete files from directory inside Document directory?

nsfilemanager

ios

nsdocumentdirectory

swift