Can I use NSNotificationCenter selector method in multiple view controllers? : <p>I have this <code>ViewControllerA</code> that pushes <code>ViewControllerB</code> onto the navigation stack, which pushes <code>ViewControllerC</code> onto the stack.</p>

<p>From <code>ViewControllerB</code>, I can pop to <code>ViewControllerA</code>. 
And from <code>ViewControllerC</code>, I can pop to <code>ViewControllerA</code>.  </p>

<p>I need to pass an <code>NSNumber</code> to <code>ViewControllerA</code> from either <code>B</code> and <code>C</code> (depending on which controller I'm using to pop to <code>A</code>).  </p>

<p>I am going to incorporate the following:</p>

<pre><code>- (void)viewDidLoad
{
    [[NSNotificationCenter defaultCenter] addObserver:self 
                                             selector:@selector(getUpdate:)        
                                                 name:@"getUpdateForCell" 
                                               object:nil];
}
</code></pre>

<p>and implement:</p>

<pre><code>- (void)getUpdate:(NSNotification *)notification {
    NSDictionary *data = [notification userInfo];
    // pop
}
</code></pre>

<p>Can I use/implement <code>getUpdate:</code> in both <code>ViewControllerB</code> and <code>ViewControllerC</code>?</p>
