macOS How to get notification of rerun application

[DeDMakar]

How to get notification of rerun application that is namely being started from the icon? Because the program is automatically started upon OS log.

 

[satyam90]

Use named mutex objects.
First create a named musted object as the first step in ur application. Check if mutex already available or not. Handle it accordingly.

 

[DeDMakar]

Can you give an example or a link to the documentation? Thank you.

 

[kainjow]

Are you trying to get notifications of when another application launches?

 

[DeDMakar]

No. The program starts up automatically upon system logon, and the icon appears in the system tray (near clock). A user may not notice the icon , thus he/she starts the program manually, and then pops up program's main window.

 

[lee1210]

Check out NSApplication's -applicationShouldHandleReopen:hasVisibleWindows:
By default, if you return YES from this method, the default reopen behavior will be performed. If you don't want this, you can use this method to do what you want instead, and return NO.

http://developer.apple.com/document...licationShouldHandleReopen:hasVisibleWindows:

-Lee

 

[DeDMakar]

Example: http://www.cocoabuilder.com/archive/message/cocoa/2001/7/8/41850

- (BOOL)applicationShouldHandleReopen:(NSApplication *)sender
hasVisibleWindows:(BOOL)flag

{
    NSBeep();
    NSLog(@"Hi");

    return YES;
}

And in awakeFromNib in the same class

[NSApp setDelegate:self];