How to detect whether an OS X application is already launched

Question

Normally an application bundle on OS X can only be started once, however by simply copying the bundle the same application can be launched twice. What\'s the best strategy t

Answer 1

detect if application with same bundleID is running, activate it and close what starts.

- (id)init method of < NSApplicationDelegate >

    NSArray *apps = [NSRunningApplication runningApplicationsWithBundleIdentifier:[[NSBundle mainBundle] bundleIdentifier]];
    if ([apps count] > 1)
    {
        NSRunningApplication *curApp = [NSRunningApplication currentApplication];
        for (NSRunningApplication *app in apps)
        {
            if(app != curApp)
            {
                [app activateWithOptions:NSApplicationActivateAllWindows|NSApplicationActivateIgnoringOtherApps];
                break;
            }
        }
        [NSApp terminate:nil];
        return nil;
    }