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PONSNotificationCenter Scope definition
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copied!<p>So I'm new to NSNotifications, I am wondering what the scope is. I.e. If I have an Application Delegate Class, and it is the receiver of a notification:</p> <pre><code>-(id)init { [ super init]; if (!self) return nil; // Add to our notification [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(receiveUpdateRequest:) name:@"RequestStatusUpdate" object:nil]; return self; } </code></pre> <p>And has this method run on receive:</p> <pre><code>- (void) receiveUpdateRequest:(NSNotification *) notification { // Check the Notification Name if ([[notification name] isEqualToString:@"RequestStatusUpdate"]){ NSLog (@"Recieved Update Status!"); } else { NSLog(@"Recieved Notification: %@",[notification name]); } } </code></pre> <p>Can I post a notification like so:</p> <pre><code>[[NSNotificationCenter defaultCenter] postNotificationName:@"RequestStatusUpdate" object:self]; </code></pre> <p>From another object instance any where in my App?</p> <p>Even for instance an object that instantiated by virtue of a NIB being loaded:</p> <pre><code>summaryWindow = [[SummaryWindowController alloc] initWithWindowNibName:@"SummaryWindow" owner:globalStatusController]; </code></pre> <p>Do I have to have anything else configured in my summaryWindow Class to be able to call the postNotificationName method. </p> <p>Or put a different way is the [NSNotificationCenter defaultCenter] global for all instances of all objects in my Application, I would assume thats how its suppose to work but currently when I call this method via an IBAction in my SummaryWindow , the notification does not seemed to be received.</p> <p>I have tested both [NSThread currentThread] and the default Notification center and it does look like I'm in the thread and the same notification center ( which I think is always global). I am only looking into the thread thing as its come up on a few other threads.</p> <pre><code>2011-08-22 20:57:11.452 AppName[23102:1307] Using Default Notification Center: <CFNotificationCenter 0x10012c900 [0x7fff7d302ea0]> 2011-08-22 20:57:20.366 AppName[23102:1307] Using Default Notification Center: <CFNotificationCenter 0x10012c900 [0x7fff7d302ea0]> </code></pre>

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