iphone - 获取文档目录中的目录数组

Question

我正在尝试返回应用程序的 Documents 目录中存在的目录列表。我能够得到一个包含给定扩展名的所有文件（例如 .txt 文件或 .png 文件）的数组，并且能够返回所有内容（包括目录）。当我只想返回目录时会出现问题。有没有一种简单的方法可以做到这一点？

这是我返回所有 .txt 文件的代码：

- (ViewController *) init {
    if (self = [super init]) self.title = @"Text Files";

    // get the list of .txt files
    directoryList = [[[[NSFileManager defaultManager] directoryContentsAtPath:DOCUMENTS_FOLDER] 
                      pathsMatchingExtensions:[NSArray arrayWithObjects:@".txt", nil]] retain];
    NSLog(@"%@", directoryList);

    return self;
}

对于所有文件

- (ViewController *) init {
    if (self = [super init]) self.title = @"Text Files";

    // get the list of all files and directories
    directoryList = [[[NSFileManager defaultManager] directoryContentsAtPath:DOCUMENTS_FOLDER] retain];

    NSLog(@"%@", directoryList);

    return self;
}

Answer 1

尝试这个：

- (ViewController *) init {
    if (self = [super init]) self.title = @"Text Files";

    // get the list of all files and directories
    NSFileManager *fM = [NSFileManager defaultManager];
    fileList = [[fM directoryContentsAtPath:DOCUMENTS_FOLDER] retain];
    NSMutableArray *directoryList = [[NSMutableArray alloc] init];
    for(NSString *file in fileList) {
        NSString *path = [DOCUMENTS_FOLDER stringByAppendingPathComponent:file];
        BOOL isDir = NO;
        [fM fileExistsAtPath:path isDirectory:(&isDir)];
        if(isDir) {
            [directoryList addObject:file];
        }
    }

    NSLog(@"%@", directoryList);

    return self;
}

Answer 2

Mrueg 写了这一切，除了一件事

fileList = [[fM directoryContentsAtPath:DOCUMENTS_FOLDER];

替换为

fileList = [fileManager contentsOfDirectoryAtPath:filePath error:nil];