Hi Gregory, The method [NSDate date] returns an autoreleased object, which has been dealloced by the time your NSTimer fires.
I'd recommend reading the documentation on memory management, starting with: http://developer.apple.com/documentation/Cocoa/Conceptual/MemoryMgmt/MemoryMgmt.html Best wishes, Hamish On Wed, Mar 12, 2008 at 8:56 PM, Gregory Short <[EMAIL PROTECTED]> wrote: > Howdy all, first-time poster here. I'm pretty new to Objective-C and > it's associated run-time environment, so I apologize if this is a > total newbie question that has been answered before (I couldn't find > anything, but I might not know where to look.) > My problem is this: I have an NSTimer which I set up in my NSView's - > awakeFromNib method. Also in -awakeFromNib, I set create an NSDate > object as part of the NSView. This all works fine. The problem is, > when my timer fires, if I try to do anything at all with the NSDate > object I created before, the program chokes. Here's the relevant > portion of the code (I've stripped out what appears to be irrelevant; > if anyone wants to see more, that's fine.) > > BlobView.h: > > @interface BlobView : NSOpenGLView > { > NSTimer* updateTimer; > NSDate* lastUpdate; > } > > - (void) updateTimer: (NSTimer *) timer; > > @end > > > > BlobView.m: > > @implementation BlobView > > - (void) awakeFromNib { > lastUpdate = [NSDate date]; > NSLog(@"%lf", [lastUpdate timeIntervalSinceNow]); // This works fine > > updateTimer = [NSTimer scheduledTimerWithTimeInterval: 1.0 / 30.0 > target: self > selector: @selector(updateTimer:) > userInfo: nil > repeats: YES]; > } > > - (void) updateTimer: (NSTimer *) timer { > NSLog(@"%lf", [lastUpdate timeIntervalSinceNow]); // This produces a > SIGBUS > } > > @end > _______________________________________________ > > Cocoa-dev mailing list ([email protected]) > > 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/hamish%40gmail.com > > This email sent to [EMAIL PROTECTED] > _______________________________________________ Cocoa-dev mailing list ([email protected]) 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]
