title: UISplitViewController not showing popup button when launching portrait
body: <p>I am doing an iPad app based on a UISplitViewController. I have a little problem with the toobar button when my app launched in potrait. The button to show the popover is not displayed. 
  However when I rotate my iPad into landscape and then back to portrait, the button shows ! </p>
  
  <p>It looks like the following method is not called on launch (this is were I have the code showing the button):</p>
  
  <pre><code>- (void)splitViewController:(UISplitViewController *)svc willHideViewController:(UIViewController *)aViewController withBarButtonItem:(UIBarButtonItem *)barButtonItem forPopoverController: (UIPopoverController *)pc
  </code></pre>
  
  <p>This method is not called when the app launches but only when there is a rotation. What is even stranger is that I made a test app using Xcode UISplitViewController template + core data (which is similar to the app I am working on, and is the template I used to make this app). On the test app on which I have not made a single line of code, the button shows when I launch my app in portrait mode and the method above is also called upon launching, as opposed to my other app. Does anyone had a similar problem ? </p>
  
  <p>Finally, it is not very clear from apple documentation whether this method is supposed to be called when a UISplitViewController is first shown:
  <a href="http://developer.apple.com/library/ios/#documentation/uikit/reference/UISplitViewControllerDelegate_protocol/Reference/Reference.html%23//apple_ref/doc/uid/TP40009454">http://developer.apple.com/library/ios/#documentation/uikit/reference/UISplitViewControllerDelegate_protocol/Reference/Reference.html%23//apple_ref/doc/uid/TP40009454</a></p>