On Wed, May 19, 2010 at 10:48 AM, Sai <jche...@gmail.com> wrote: > I have two questions: > 1. Look at the awakeFromNib method of Controller, my output of the retain > count to the console are > myModel retain count: 5 > controller retain count: 17 > both number are very surprised me, why is that? I suppose they should be 2 > or 1? > Can anyone explain please?
When you've just loaded a nib file, there can be all sorts of auxiliary stuff going on that you're not aware of (and can't really be aware of). To give an example off the top of my head, the nib-loading mechanism probably has a list of objects that it's going to send "awakeFromNib" to, which are held temporarily in an NSArray (which retains its contents). For this reason and many others, you should *never* rely on the retainCount to give you any useful information. Seriously, just don't even call that method, ever. All you need to do is make sure your alloc/copy/retain calls are each matched by a corresponding release/autorelease somewhere, which it looks like they are in your code (using properties helps a lot). > 2. No matter wether I quit the program from my iPhone simulator or I quit > the simulaor, none of the > dealloc method is invoked because there is no any NSLog output from the > deallocmethod to the console. > Why? I know this probably can be solved if I have the retain count as I > expected. This is normal behavior for both Cocoa apps on Mac OS X, and iPhone apps. Rather than manually freeing a lot of memory, byte by byte (which will all be freed in one fell swoop when the process exits anyway), an app that is quitting just quits, which is a lot faster. If there's something in particular you need to do when the app quits (saving some data or something) you should implement one of the UIApplicationDelegate methods that tells you when the application is about to terminate. -- // jack // http://nuthole.com // http://learncocoa.org _______________________________________________ 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
