title: UISplitViewController: How force to show master popover in app launch? (portrait)
body: <p>In an iPad App i'm using the UISplitViewController.
  I need to force to show the master popover when the app launch in portrait mode.</p>
  
  <p>Now I'm using this code and it works well on iOS 5.0. </p>
  
  <pre><code>if (UIInterfaceOrientationIsPortrait(self.interfaceOrientation)) {
     if ([[[AppDelegate sharedAppDelegate] splitViewController] respondsToSelector:[[[AppDelegate sharedAppDelegate] btnMenu] action]]) {
        [[[AppDelegate sharedAppDelegate] splitViewController] performSelector:[[[AppDelegate sharedAppDelegate] btnMenu] action]];
     }            
  }
  </code></pre>
  
  <p>But in iOS 5.1 (with the new type of master popover) the behaviour seems to be random. 
  Sometimes the popover shows in fullscreen and sometimes works well.</p>
  
  <p>Some suggestion for 5.1?</p>