iphone setRightBarButtonItem from AppDelegate
<p>I am trying to set the right button of the navbar from within the appDelegate, the code compiles and executes without error but the button does not appear. </p>

<p>Any assistance would be appreciated.</p>

<p>Thanks.</p>

<pre><code>NSAutoreleasePool *apool = [[NSAutoreleasePool alloc] init];
    UIActivityIndicatorView *aiv = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
    UIBarButtonItem *activityButtonItem = [[UIBarButtonItem alloc] initWithCustomView:aiv];
    [aiv startAnimating]; 
    [aiv release];


    [self.navigationController.navigationItem setRightBarButtonItem:activityButtonItem animated:YES];
    [activityButtonItem release];
    [apool release];
</code></pre>
