iPhone:NSFilemanager fileExistsAtPath:isDirectory:无法正常工作？

Question

我正在为越狱的iPhone开发应用程序.我正在尝试只获取文件夹的目录.所以我这样做:

NSArray *contentOfFolder = [[NSFileManager defaultManager] directoryContentsAtPath:path];
NSLog(@"contentOfFolder: %@", contentOfFolder);
directoriesOfFolder = [[NSMutableArray alloc] initWithCapacity:100];
for (NSString *aPath in contentOfFolder) {
    NSLog(@"apath: %@", aPath);

    BOOL isDir;
if ([[NSFileManager defaultManager] fileExistsAtPath:aPath isDirectory:&isDir] &&isDir)
    {
        [directoriesOfFolder addObject:aPath];
        NSLog(@"directoriesOfFolder %@", directoriesOfFolder);
    }
}
NSLog(@"dirctories %@", directoriesOfFolder);

但看看我得到了什么.当我得到文件夹的内容一切都很好:

2009-07-28 23:23:35.930 Drowser [573:207] new path/private/var 2009-07-28 23:23:35.945 Drowser [573:207] contentOfFolder :( Keychains,"Managed Preferences",MobileDevice,备份,缓存,数据库,ea,空,文件夹,lib,本地,锁,日志,日志,移动,消息,首选项,根,运行,后台打印,藏匿,tmp,虚拟机

但是之后:

2009-07-28 23:23:35.950 Drowser [573:207] apath:Keychains 2009-07-28 23:23:35.954 Drowser [573:207] apath:Managed Preferences 2009-07-28 23:23:35.959 Drowser [573:207] apath:MobileDevice 2009-07-28 23:23:35.984 Drowser [573:207] apath:backups 2009-07-28 23:23:35.993 Drowser [573:207] apath:cache 2009-07- 28 23:23:36.002 Drowser [573:207] apath:db 2009-07-28 23:23:36.011 Drowser [573:207] apath:ea 2009-07-28 23:23:36.019 Drowser [573:207] apath:empty 2009-07-28 23:23:36.028 Drowser [573:207] apath:folders 2009-07-28 23:23:36.037 Drowser [573:207] apath:lib 2009-07-28 23:23: 36.046 Drowser [573:207] directoriesOfFolder(lib)

只有"lib"!被识别为文件夹.怎么可能？其他人也是文件夹.我通过SSH确认了它.

有没有人有想法？难道我做错了什么？

Answer 1

这是一个非常容易犯的错误,但它也很容易修复.枚举目录的内容只会为您提供项目的名称,而不是项目的完整路径.你必须自己构建完整的路径.那你在哪里:

for (NSString *aPath in contentOfFolder) {
  NSLog(@"apath: %@", aPath);

  BOOL isDir;
  if ([[NSFileManager defaultManager] fileExistsAtPath:aPath isDirectory:&isDir] &&isDir) {
    [directoriesOfFolder addObject:aPath];
    NSLog(@"directoriesOfFolder %@", directoriesOfFolder);
  }
}

你应该有这个:

for (NSString *aPath in contentOfFolder) {
  NSString * fullPath = [path stringByAppendingPathComponent:aPath];

  BOOL isDir;
  if ([[NSFileManager defaultManager] fileExistsAtPath:fullPath isDirectory:&isDir] &&isDir) {
    [directoriesOfFolder addObject: fullPath];
  }
}