问题
- bookmarkDataWithOptions:includingResourceValuesForKeys:relativeToURL:error:
Documentation states:
This method returns bookmark data that can later be resolved into a URL object for a file even if the user moves or renames it (if the volume format on which the file resides supports doing so).
My question is, how can I query if a volume supports this feature?
From trial and error it seems only (internal?) hard drives support it, but I am looking for some kind of sure test like a NSURLVolumeSupports???Key.
NSURLVolumeSupportsPersistentIDsKey looks like a good candidate, but I failed to find any docs or google-info about it. Any hints?
来源：https://stackoverflow.com/questions/33464056/how-to-determine-a-volume-supports-resolving-bookmarks-to-renamed-or-moved-files