Cocoa URL bookmark triggered by events

Question

Is it possible to listen to some notification that triggers upon file modification, such as rename or move?

Currently, I created a bookmark to a file, stored its last modified date (thanks to this great post: Keep a reference to a file after it has moved in objective-c?), and then my application sets a timer that compares the bookmark's URL's last modified date, and acts upon changes.

My question is - is it possible to listen to some event, perhaps some mechanism similar to NSWorkspaceDidPerformFileOperationNotification, in order to monitor my directory's modifications, instead of using a timer?

Thanks, Nili

Answer 1

There are several ways to accomplish your goal:

• NSFileCoordinator together with an Object that implement NSFilePresenter
• File Systems Events to listen for changes of your file or directory
• File monitoring using Grand Central Dispatch

To watch a single file, you'll probably be most happy with NSFileCoordinator.