On May 11, 2011, at 4:02 PM, Martin Batholdy wrote: > My program consists of a menu item and is NSUIagent - so it is hidden in the > Mac OS app-bar.
I'm not familiar with "NSUIagent" and search of the docs don't produce any hits. Did you mean LSUIElement? I also assume that "menu item" refers to a status item and that "Mac OS app-bar" means the Dock. Using precise terminology is necessary for people to be able to help you. > Now what surprises me is that I am able to open several instances of this > program. > Every time I click on the app-file a new symbol appears and I have a new > instance of my program running. Are you sure you have a new instance rather than just a second status item? Does Activity Monitor show two processes for your app? > How can I prevent this? > (so that system-wide you can only have one instance of the program running) You almost certainly mean "session-wide", not "system-wide", since other users can be logged in to other sessions via Fast User Switching. Anyway, this is the default. Launch Services will not normally launch a second instance of your app. (The Finder uses Launch Services when you double-click an icon.) So, I suspect that you are creating a second status item in response to the events and corresponding delegate method calls that occur when your app is double-clicked a second time. In what method are you creating the status item? Regards, Ken _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
