I have an NSStatusItem app that I’ve had to migrate to a sandboxed app for
release in the MAS. In its preferences window, there is a checkbox for “Launch
at login”. If I launch the app with no preferences set (i.e. defaults delete
my.bundle.identifier, rm ~/Library/Container/my.bundleIdentifier), open the
preferences and check the login checkbox. the app behaves as expected in that
the checkbox gets checked and if I logout/login, the app is launched. If I open
the app’s preferences now, the checkbox is checked as it should be, but if I
uncheck it and then check it again, I get a second instance of my app in the
menu bar. Clearing the preferences again, starts the cycle over. The really odd
thing is that I’ve only noticed this on a brand new MB Pro 15”. I also have an
iMac that is ~2010 and another MB Pro ~2008, neither of which exhibit this
behavior. All machines are running Yosemite. I’ve yet to test this on older
OS’s. I never get more than two instances no matter how many times I
uncheck/check the checkbox. Now there are actually two separate processes, Top
shows two different PID’s. I thought Launch Services was supposed to prevent
this. Since this is a sandboxed app, I added a helper app to the project which
launches the app depending on if the checkbox was checked. I’ve added code to
that helper to check if the app is already running. (look through
NSRunningApplications and check for my bundle identifier). This doesn’t prevent
the second instance from occurring. So anyone have any ideas why this might be
happening?
On a side note. how does one debug the helper app within the context of the
main application? I can launch the helper app through its subproject and step
through it with the debugger. If I have the main app already running when I do
this, the helper quits without attempting to launch another instance of the
main app. But I don’t even get NSLogs from the helper when its running from the
main app.
Here is the code in the window controller for the preferences window:
(IBAction)toggleLoginStatus:(NSButton*)sender{
if(!SMLoginItemSetEnabled((__bridge
CFStringRef)@“my.bundle.Identifier", (BOOL)[sender state])){
NSLog(@“Crap!");
}
}
Here is the code for the helper app:
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
NSString * path;
BOOL alreadyRunning = NO;
NSArray *running = [[NSWorkspace sharedWorkspace] runningApplications];
for (NSRunningApplication *app in running) {
if ([[app bundleIdentifier]
isEqualToString:@“my.bundle.Identifier"]) {
alreadyRunning = YES;
}
}
if(!alreadyRunning){
path = [[[[[[NSBundle mainBundle] bundlePath]
stringByDeletingLastPathComponent]
stringByDeletingLastPathComponent]
stringByDeletingLastPathComponent]
stringByDeletingLastPathComponent];
[[NSWorkspace sharedWorkspace] launchApplication:path];
}
[NSApp terminate:nil];
}
-
(And a slight rant:
The LSSharedFileList method worked just perfectly to create a startup
item. Such a shame I had to dump perfectly good working code because of
sandboxing.)
Thanks
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