获取文档目录中的目录数组 [英] Get array of directories in documents directory

问题描述

我正在尝试返回应用程序的Documents目录中的目录列表。我能够获得一个包含给定扩展名的所有文件的数组（例如.txt文件或.png文件），并且能够返回所有内容（包括目录）。当我想只返回目录时出现问题。有一个简单的方法吗？

I am trying to return the list of directories present in an app's Documents directory. I am able to get an array containing all files of a given extension (eg .txt files or .png files) and am able to return all contents (including directories). The problem arises when I want to return only the directories. Is there a simple way of doing this?

这是我的返回所有.txt文件的代码：

Here is my code for returning all .txt files:

- (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;
}

和所有文件

- (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;
}

推荐答案

试试这个：

- (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;
}

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