Question

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

（假设文档目录路径正确）

Answer 1

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.
    }
}

如果它存在，我会留下你对错误做一些有用的事情。

Answer 2

如果要删除文件和目录本身，请在没有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
}

Answer 3

对于快速爱好者来说同样如此：

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)
}

Answer 4

大部分较旧的答案都让您使用contentsOfDirectoryAtPath:error:，但according to Apple：

＆＃34;指定文件或目录位置的首选方法是使用NSURL类＆＃34;

所以如果你想使用NSURL，你可以使用方法contentsOfDirectoryAtURL:includingPropertiesForKeys: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
        }
    }

Answer 5

Swift 4

  do {

        let destinationLocation:URL = ...

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

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

如何删除应用程序上指定目录中的所有文件？

5 个答案: