如何删除应用程序中指定目录下的所有文件？

发布于 2024-08-20 13:18:48 字数 133 浏览 4 评论 0原文

给定一个目录 [[self filesDirectory] stringByAppendingPathComponent:@"Photos/"] 如何删除此文件夹中的所有文件？

（假设正确的文档目录路径）

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我也只是我 2024-08-27 13:18:49

NSFileManager *fm = [NSFileManager defaultManager];
NSString *directory = [[self documentsDirectory] stringByAppendingPathComponent:@"Photos/"];
NSError *error = nil;
for (NSString *file in [fm contentsOfDirectoryAtPath:directory error:&error]) {
    BOOL success = [fm removeItemAtPath:[NSString stringWithFormat:@"%@%@", directory, file] error:&error];
    if (!success || error) {
        // it failed.
    }
}

如果错误存在，我会让您对错误执行一些有用的操作。

NSFileManager *fm = [NSFileManager defaultManager];
NSString *directory = [[self documentsDirectory] stringByAppendingPathComponent:@"Photos/"];
NSError *error = nil;
for (NSString *file in [fm contentsOfDirectoryAtPath:directory error:&error]) {
    BOOL success = [fm removeItemAtPath:[NSString stringWithFormat:@"%@%@", directory, file] error:&error];
    if (!success || error) {
        // it failed.
    }
}

I leave it up to you to do something useful with the error if it exists.

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梦纸 2024-08-27 13:18:49

如果您想删除文件和目录本身，请在不使用 for 循环的情况下使用它

NSFileManager *fm = [NSFileManager defaultManager];
NSString *directory = [[self documentsDirectory] stringByAppendingPathComponent:@"Photos"];
NSError *error = nil;
BOOL success = [fm removeItemAtPath:cacheImageDirectory error:&error];
if (!success || error) {
    // something went wrong
}

if you want to remove files and the directory itself then use it without for loop

NSFileManager *fm = [NSFileManager defaultManager];
NSString *directory = [[self documentsDirectory] stringByAppendingPathComponent:@"Photos"];
NSError *error = nil;
BOOL success = [fm removeItemAtPath:cacheImageDirectory error:&error];
if (!success || error) {
    // something went wrong
}

回复收藏 0 原文

倥絔 2024-08-27 13:18:49

对于快速爱好者来说也是如此：

let fm = FileManager.default
do {
  let folderPath = "...my/folder/path"
  let paths = try fm.contentsOfDirectory(atPath: folderPath)
  for path in paths
  {
    try fm.removeItem(atPath: "\(folderPath)/\(path)")
  }
} catch {
  print(error.localizedDescription)
}

same for swift lovers:

let fm = FileManager.default
do {
  let folderPath = "...my/folder/path"
  let paths = try fm.contentsOfDirectory(atPath: folderPath)
  for path in paths
  {
    try fm.removeItem(atPath: "\(folderPath)/\(path)")
  }
} catch {
  print(error.localizedDescription)
}

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流心雨 2024-08-27 13:18:49

大多数较旧的答案都让您使用 contentsOfDirectoryAtPath:error: ，它可以工作，但是根据 Apple：

“指定文件或目录位置的首选方法是使用 NSURL 类”

因此如果您想使用 NSURL 来代替，您可以使用方法 contentsOfDirectoryAtURL:includePropertiesForKeys:options:error: 所以它看起来像这样：

NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray<NSURL*> *urls = [fileManager contentsOfDirectoryAtURL:directoryURL includingPropertiesForKeys:@[NSURLNameKey, NSURLIsDirectoryKey] options:NSDirectoryEnumerationSkipsHiddenFiles error:nil];

    for (NSURL *url in urls)
    {
        NSError *error = nil;
        BOOL success = [fileManager removeItemAtURL:url error:error];
        if (!success || error) {
            // something went wrong
        }
    }

Most of the older answers have you use contentsOfDirectoryAtPath:error: which will work, but according to Apple:

"The preferred way to specify the location of a file or directory is to use the NSURL class"

so if you want to use NSURL instead you can use the method contentsOfDirectoryAtURL:includingPropertiesForKeys:options:error: so it would look something like this:

NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray<NSURL*> *urls = [fileManager contentsOfDirectoryAtURL:directoryURL includingPropertiesForKeys:@[NSURLNameKey, NSURLIsDirectoryKey] options:NSDirectoryEnumerationSkipsHiddenFiles error:nil];

    for (NSURL *url in urls)
    {
        NSError *error = nil;
        BOOL success = [fileManager removeItemAtURL:url error:error];
        if (!success || error) {
            // something went wrong
        }
    }

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好倦 2024-08-27 13:18:49

斯威夫特4

  do {

        let destinationLocation:URL = ...

        if FileManager.default.fileExists(atPath: destinationLocation.path) {
            try! FileManager.default.removeItem(at: destinationLocation)
        }

    } catch {
    print("Error \(error.localizedDescription)")
    }

Swift 4

  do {

        let destinationLocation:URL = ...

        if FileManager.default.fileExists(atPath: destinationLocation.path) {
            try! FileManager.default.removeItem(at: destinationLocation)
        }

    } catch {
    print("Error \(error.localizedDescription)")
    }

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~没有更多了~