如何获取 NSDocumentDirectory 中的目录列表？答案

【问题标题】：How to get the list of directores in NSDocumentDirectory?如何获取 NSDocumentDirectory 中的目录列表？
【发布时间】：2013-02-02 14:00:50
【问题描述】：

我在 NSDocumentDirectory 中创建了一些目录

if (![tbxCreateFolder.text isEqualToString:@""]) {
NSArray  *arrPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectoryStr = [arrPaths objectAtIndex:0]; // Get documents folder
NSString *dataPath = [documentsDirectoryStr stringByAppendingPathComponent:[NSString stringWithFormat:@"/%@",tbxCreateFolder.text]];

if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath]){

    NSError* error;
    if([[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:&error]){

        NSLog(@"success");
        //Perfrom DB Insertation
    }
    else
    {
        NSLog(@"[%@] ERROR: attempting to write create MyFolder directory", [self class]);
        NSAssert( FALSE, @"Failed to create directory maybe out of disk space?");
    }
}

}

现在我想获取我在文件夹中创建的目录列表，但响应是

NSArray *arrPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *basePathString = ([arrPaths count] > 0) ? [arrPaths objectAtIndex:0] : nil;
NSLog(@"dirContents %@",basePathString);

回复是：

/Users/amir/Library/Application Support/iPhone Simulator/6.1/Applications/7003E8D5-CCBB-4E54-896B-F4BD2F4D2CB1/Documents

【问题讨论】：

标签： ios objective-c nsfilemanager nsdocumentdirectory

【解决方案1】：

代码如下：

NSString *documentDirPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
// create directory named "test"
[[NSFileManager defaultManager] createDirectoryAtPath:[documentDirPath stringByAppendingPathComponent:@"test"] withIntermediateDirectories:YES attributes:nil error:nil];
// retrieved all directories
NSLog(@"%@", [[NSFileManager defaultManager] contentsOfDirectoryAtPath:documentDirPath error:nil]);

 NSArray *paths = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:documentDirPath error:nil];
 BOOL isDir = NO;
 for (NSString *path in paths) {
     if ([fileManager fileExistsAtPath:path isDirectory:&isDir] && isDir) {
         // path is directory
     }
}

【讨论】：

所有文件中的响应也是如此。但我只想获取目录名称。

【解决方案2】：

试试这个，

 NSArray *arrPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
 NSString *strFilePath = [[arrPath objectAtIndex:0] 
[[NSFileManager defaultManager] createDirectoryAtPath:[strFilePath stringByAppendingPathComponent:@"Sample"] withIntermediateDirectories:YES attributes:nil error:nil];

【讨论】：

【解决方案3】：

您始终可以像这样使用-fileExistsAtPath:isDirectory: 枚举顶级目录的内容：

NSFileManager *sharedFileManager = [NSFileManager defaultManager];
NSDirectoryEnumerator *files = [sharedFileManager enumeratorAtPath:yourPath];

for (NSString *path in files) {
    BOOL isDirectory = NO;
    [sharedFileManager fileExistsAtPath:path isDirectory:&isDirectory];
    if (isDirectory) {
        // you found a directory, so do what you will with it
    }
}

【讨论】：

【解决方案4】：

只需几行简单的代码就可以做到这一点

NSString *documentDirectoryPath = // Initialize with Documents path
BOOL isDir = NO;
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *files = [fileManager contentsOfDirectoryAtPath:documentDirectoryPath error:NULL];

NSMutableArray *directoriesPaths = [NSMutableArray array];
for (NSString *filePath in files) {
    if ([fileManager fileExistsAtPath:filePath isDirectory:&isDir] && isDir) {
        [directoriesPaths addObject:filePath];
    }
}

NSLog(@"directories %@", directoriesPaths);

【讨论】：

能否请您完成这行“NSString *documentDirectoryPath = // 使用文档路径初始化”
当然。您已经有了 Documents 目录的路径，在您的代码中是 basePathString。在你的下面添加我的代码，但在此之前将 NSString *documentDirectoryPath = // Initialize with Documents path 更改为 NSString *documentDirectoryPath = basePathString