I've come up with an applucation design that works better than my previous suggestion of psuedo-polling launchedApplications. Rather, the relaunch application subscribes to NSWorkspace's notification center, and waits until it gaurantees that its owner-Application has terminated. If you want the entire program plus a demo program which uses this, go to:
http://they.dontexist.org/relaunch.zip (source is included, plus a universal binary of the demo in action, feel free to use it all you want) Here is the entire code for relaunch.app: #import <Cocoa/Cocoa.h> @interface tizzy : NSObject { NSString *appPath; } - (void) gotQuitMessage:(NSNotification*)theNotification; @end #import "tizzy.h" @implementation tizzy // in the .nib this object must be included (though feel free to delete the NSWindow in there) // though im sure theres non-GUI workarounds, too - (id) init { // create the appPath which we are waiting for to quit if (self = [super init]) { [[[NSWorkspace sharedWorkspace] notificationCenter] addObserver:self selector:@selector(gotQuitMessage:) name:NSWorkspaceDidTerminateApplicationNotification object:nil]; appPath = [[[NSProcessInfo processInfo] arguments] objectAtIndex:0]; // we are relaunching whatever application this one lies inside of // so we use a loop to get rid of everything except BigApp.app in this: // BigApp.app/Contents/Resources/relauncher.app/Contents/MacOS/relauncher at least) int i; for (i = 0; i < 6; i++) appPath = [appPath stringByDeletingLastPathComponent]; ( [appPath retain]; } return self; } // when we get the notification, relaunch the app at appPath and quit this one! // unfortunately, i still cant figure out how to give focus to that "parent" application. - (void) gotQuitMessage:(NSNotification*)theNotification { NSString *theQuittingApp = [[theNotification userInfo] valueForKey:@"NSApplicationPath"]; if ([appPath isEqualToString:theQuittingApp]) { [[NSWorkspace sharedWorkspace] launchApplication:appPath]; [NSApp terminate:self]; } } @end On Mon, Mar 3, 2008 at 4:22 PM, Michael Ash <[EMAIL PROTECTED]> wrote: > On Mon, Mar 3, 2008 at 2:43 PM, Steven Degutis <[EMAIL PROTECTED]> wrote: > > Perhaps a small application like relaunch.app could be imbedded into > > your relaunchable application, where all it pretty much does is serve > > as a buffer by relaunching your application reliably (through Cocoa > > methods) after your app calls it the same way you mentioned above. > > > > [[NSWorkspace sharedWorkspace] > launchApplication:relauncherExecutablePath]; > > [NSApp terminate:self]; > > > > Then the relaunch.app program uses a method which calls itself > > continuously (like a loop that wont make your app unresponsive), which > > does a check to see if the original app is still running using > > NSWorkspace's -launchedApplications, and only after it sees your app > > end, then it will run the app again and terminate itself. This ensures > > that your app opens only after it ends first. And doing this would be > > quite easy, using two methods, -awakeFromNib and your custom method > > -hasAppEnded. The former would launch the second one immediately, and > > do nothing else, and the second one would do the check, and at the > > end, if it is still running (hasnt quit and run the new app) it would > > launch itself with [self performSelector:@selector(hasAppEnded) > > withObject:nil afterDelay:1.0]; or something. This is what I would do > > anyway. 1.0 might be too long or too short for a real application, > > though. > > The best way is to write a little program like this (error checking > removed for brevity, typed in mail client, caveat emptor): > > int main(int argc, char **argv) > { > char dummy; > read(STDIN_FILENO, &dummy, 1); > > [NSAutoreleasePool new]; > NSURL *url = [NSURL fileURLWithPath:[NSString > stringWithUTF8String:argv[1]]]; > LSOpenCFURLRef((CFURLRef)url, NULL); > > return 0; > } > > Then invoke it using an NSTask in the main app: > > NSTask *task = [[NSTask alloc] init]; > [task setLaunchPath:pathToHelper]; > [task setArguments:[NSArray arrayWithObject:[[NSBundle mainBundle] > bundlePath]]]; > [task setStandardInput:[NSPipe pipe]]; > [task launch]; > > And then quit the app. The subtask will block in the read waiting for > data on the pipe which will never come. When your app terminates, the > write end of the pipe closes, unblocking the read in the subtask. The > subtask then relaunches your app using the URL you gave it as a > parameter. It's fast, easy to use, and requires no polling or messy > shell scripts. > > Mike > > > _______________________________________________ > > 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/sephknows%40gmail.com > > This email sent to [EMAIL PROTECTED] > _______________________________________________ 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 [EMAIL PROTECTED]
