iOS列表現有目錄

Question

我已經獲取文檔目錄的路徑並在裏面創建一些目錄。我已經知道如何檢查目錄是否存在，刪除它或其文件，但是，我如何列出目錄？謝謝。

的文件列表，我用：

int Count; 
    NSString *path; 
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
    path = [[paths objectAtIndex:0] stringByAppendingPathComponent:@"SomeDirectoryName"]; 
    NSArray *directoryContent = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:path error:NULL]; 
    for (Count = 0; Count < (int)[directoryContent count]; Count++) 
    { 
     NSLog(@"File %d: %@", (Count + 1), [directoryContent objectAtIndex:Count]); 
    } 

Answer 1

例如，這種方法將刪除應用程序的臨時目錄中的所有文件：

- (void)cleatTmpDirectory 
{ 
    // Create a local file manager instance 
    NSFileManager *localFileManager = [[NSFileManager alloc] init]; 
    NSURL *directoryToScan = [NSURL fileURLWithPath:[self applicationTmpDirectory]]; 

    NSDirectoryEnumerator *dirEnumerator = 
    [[localFileManager enumeratorAtURL:directoryToScan 
      includingPropertiesForKeys:[NSArray arrayWithObjects:NSURLIsDirectoryKey,nil] 
           options: NSDirectoryEnumerationSkipsHiddenFiles    | 
     NSDirectoryEnumerationSkipsSubdirectoryDescendants | 
     NSDirectoryEnumerationSkipsPackageDescendants 
          errorHandler:nil] retain]; 

    NSError *error; 
    // Enumerate the dirEnumerator results, each value is stored in allURLs 
    for (NSURL *theURL in dirEnumerator) 
    { 
     // Retrieve whether a directory. 
     NSNumber *isDirectory; 
     [theURL getResourceValue:&isDirectory forKey:NSURLIsDirectoryKey error:NULL]; 

     if ([isDirectory boolValue] == NO) 
     { 
      [localFileManager removeItemAtURL:theURL error:&error]; 
     } 
    } 

    // Release the localFileManager. 
    [localFileManager release]; 
} 

你可以找到你應該使用NSDirectoryEnumerator *dirEnumerator，並傳遞給它的初始化方法適合keys，然後您將使用它。

Answer 2

使用由NSFileManager的-enumeratorAtPath:方法返回的NSDirectoryEnumerator。