Dear Experts,
We are required to remove our NSFilePresenters from the NSFileCoordinator when the app goes to the background and re-add them when it returns to the foreground.
Does this mean that when we foreground, we need to manually check if our files have been modified, deleted, or moved in the meantime? Or is there some mechanism in NSFilePresenter/NSFileCoordinator that will report any such changes to us?
Detecting that a file has been modified or deleted is not difficult, but I don't think it's possible to detect that it has moved. Changes to directories are also difficult.
Any advice? What does UIDocument do in this case?