NSFilePath = / var / mobile / Applications / xxx无法完成操作。不允许操作

Question

我有越狱iphone和越狱itouch。我想要的是在设备上列出已安装的应用程序。它在iphone上很成功，但它在itouch中失败了。相同的代码，但结果不同，这让我很烦恼。

NSFileManager* fileManager = [NSFileManager defaultManager];
for (NSString *path in [fileManager contentsOfDirectoryAtPath:@"/var/mobile/Applications" error:NULL]) 
{
  NSError *error;

  for (NSString *subPath in [fileManager contentsOfDirectoryAtPath:[NSString stringWithFormat:@"/var/mobile/Applications/%@",path] error:&error]) 
  {
    NSLog(@"@\n",subPath);
    if ([subPath hasSuffix:@".app"])
    {
        NSString* infoplist = [NSString stringWithFormat:@"/var/mobile/Applications/%@/%@/Info.plist", path, subPath];
        NSDictionary* dict = [NSDictionary dictionaryWithContentsOfFile:infoplist];

        if ([dict objectForKey:@"CFBundleDisplayName"]) 
        {
            NSString *str = [dict objectForKey:@"CFBundleDisplayName"];
            NSLog(@"%@",str);
            textView.text = [NSString stringWithFormat:@"%@\n%@",textView.text,str];
        }
    }
}

NSLog(@"%@",[error description]);