> On Nov 7, 2016, at 10:46 AM, Richard Charles <rcharles...@gmail.com> wrote: > > [doc performSelector:@selector(updateChangeCount:) > withObject:@(NSChangeUndone) > afterDelay:0];
That one definitely won’t work. The parameter to updateChangeCount: is an integer (enum) value, not an object reference, but you’re calling it with an NSNumber object. The value actually passed to the method will be a garbage value based on the raw address* of the NSNumber object. If you want to use a delayed-perform to call a method that takes a non-object parameter, you have to create a new method that makes the call you want, then invoke _that_ method using a delayed perform. (Or you could just do things the modern way, with dispatch_async and a block.) —Jens * I’m aware that small integers don’t turn into real NSNumber objects on the heap, rather a tagged pointer, but the result is the same: a pointer that will result in a garbage value when interpreted as an integer. _______________________________________________ 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
