On Mar 8, 2011, at 9:42 AM, Gordon Apple wrote:
> Class A: NSObject, has methods:
>
> - (void)foo:(Notification*)notification {
> ...
> }
>
> - (void)addObservers {
> [[NSNotificationCenter defaultCenter] addObserver:self
> selector:@selector(foo:)
> name:notificationName
> object:nil];
> }
>
>
> Class B: subclass of A. This is the class used.
>
> Notification sent from elsewhere. Console:
>
> -[NSCFString foo:]: unrecognized selector sent to instance 0x69807c0
>
>
> Is this due to confusion of of which class received the notification? Or is
> this a compiler/linker bug? I even tried declaring foo in A’s headers, to
> no avail. This same overall procedure is used elsewhere (without
> subclassing), with no problems. What am I missing?
>
>
>
That's a classic memory management problem.
Most likely, you're forgetting to unregister your observer when you are
deallocating it (resulting in a notification center to have a stale pointer
that is later reused by an NSString).
Glenn Andreas gandr...@gandreas.com
The most merciful thing in the world ... is the inability of the human mind to
correlate all its contents - HPL
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