在 Swift 中从 documentDirectory 中删除所有文件

Question

我正在制作一个音频应用程序，用户可以使用FileManager下载本地存储到documentDirectory的文件。

接下来，我想允许用户使用按钮删除所有文件。在文档中，有一种删除项目的方法。

这是我的代码：

@IBAction func deleteDirectoryButton(_ sender: Any) {
let documentsUrl =  FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
do {
try FileManager.default.removeItem(at: documentsUrl, includingPropertiesForKeys: nil, options: [])
} catch let error {
print(error)
}
}

不幸的是，这不会构建错误Ambiguous reference to member 'removeItem(atPath:)'。

有没有更好的方法来访问documentDirectory并一举从目录中删除所有文件？

Answer 1

首先，发生错误是因为 API 的签名错误。它只是没有其他参数removeItem(at:)。

第二个问题是您要删除Documents目录本身，而不是不鼓励您这样做的目录中的文件。

您必须获取目录的内容并添加检查，例如仅删除MP3文件。更好的解决方案是使用子文件夹。

let documentsUrl =  FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
do {
let fileURLs = try FileManager.default.contentsOfDirectory(at: documentsUrl,
includingPropertiesForKeys: nil,
options: .skipsHiddenFiles)
for fileURL in fileURLs where fileURL.pathExtension == "mp3" {
try FileManager.default.removeItem(at: fileURL)   
}
} catch  { print(error) }

旁注：强烈建议始终使用与 URL 相关的 APIFileManager。

Answer 2

试试这个

func clearAllFiles() {
let fileManager = FileManager.default

let paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first!

print("Directory: (paths)")

do {
let fileName = try fileManager.contentsOfDirectory(atPath: paths)

for file in fileName {
// For each file in the directory, create full path and delete the file
let filePath = URL(fileURLWithPath: paths).appendingPathComponent(file).absoluteURL
try fileManager.removeItem(at: filePath)
}
} catch let error {
print(error)
}
}

Answer 3

只需使用如下代码

将文档目录中的音频文件另存为

func getDocumentsDirectory() -> URL
{
//Get Basic URL
let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
/// Enter a Directory Name in which files will be saved
let dataPath1 = documentsDirectory.appendingPathComponent("folder_name_enter")
let dataPath = dataPath1.appendingPathComponent("folder inside directory if required (name)")
//Handler
do
{
try FileManager.default.createDirectory(atPath: dataPath.path, withIntermediateDirectories: true, attributes: nil)
}
catch let error as NSError
{
print("Error creating directory: (error.localizedDescription)")
}
return dataPath
}

删除

func clearAllFilesFromTempDirectory()
{
let fileManager = FileManager.default
let dirPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
let tempDirPath = dirPath.appending("/folder_name/(inside_directoryName)")
do {
let folderPath = tempDirPath
let paths = try fileManager.contentsOfDirectory(atPath: tempDirPath)
for path in paths
{
try fileManager.removeItem(atPath: "(folderPath)/(path)")
}
}
catch let error as NSError
{
print(error.localizedDescription)
}
}

保存方法

getDocumentsDirectory().appendingPathComponent("(audioName).wav")

删除方法

/// Just call
clearAllFilesFromTempDirectory

Answer 4

这是我的扩展，用于从目录中删除所有文件和缓存。

// MARK: - FileManager extensions
extension FileManager {

/// Remove all files and caches from directory.
public static func removeAllFilesDirectory() {
let fileManager = FileManager()
let mainPaths = [
FileManager.default.urls(for: .applicationSupportDirectory, in: .userDomainMask).map(.path)[0],
FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask).map(.path)[0]
]
mainPaths.forEach { mainPath in
do {
let content = try fileManager.contentsOfDirectory(atPath: mainPath)
content.forEach { file in
do {
try fileManager.removeItem(atPath: URL(fileURLWithPath: mainPath).appendingPathComponent(file).path)
} catch {
// Crashlytics.crashlytics().record(error: error)
}
}
} catch {
// Crashlytics.crashlytics().record(error: error)
}
}
}
}

Answer 5

Swift 5

删除整个文件夹：

如果您想删除整个文件夹，只需执行以下操作：

func deleteFolder(_ folderName: String, completion: () -> Void) {
let fileManager = FileManager.default
let directory = fileManager.cachesDirectory().appendingPathComponent(folderName)
_ = try? fileManager.removeItem(at: directory)
completion()
}

根据名称删除某些文件：

这将遍历所有文件并删除所有包含

func removeFiles(containing: String, completion: () -> Void) {
let fileManager = FileManager.default
let directory = fileManager.cachesDirectory()

if let fileNames = try? fileManager.contentsOfDirectory(atPath: directory.path) {
for file in fileNames {
if file.contains(containing) {
let filePath = URL(fileURLWithPath: directory.path).appendingPathComponent(file).absoluteURL
_ = try? fileManager.removeItem(at: filePath)
}
}
}
completion()
}