title: Subclass of UIViewController shows black screen
body: <p>I created a Subclass of UIViewController in my Project and linked it to a View which is modal-pushed by the "RootViewController". I made absolutely no changes to the derived class, but when the "SecondView" is pushed it turns black every time. If i link that view to the standard UIViewController class everything works fine? </p>
  
  <p>Since the "SecondViewController" is derived from UIViewController I can only guess that the Problem has to do with the alloc/init function but I have no idea where to start.</p>
  
  <p>I can provide the sample code I have in front of me now if necessary.</p>
  
  <p>This is the derived subclass:</p>
  
  <pre><code>#import "SecondViewController.h"
  
  @interface SecondViewController ()
  
  @end
  
  @implementation SecondViewController
  
  - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
      self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
      if (self) {
          // Custom initialization
      }
      return self; }
  
  - (void)loadView {}
  
  - (void)viewDidLoad {
      [super viewDidLoad]; }
  
  - (void)viewDidUnload {
      [super viewDidUnload];}
  
  - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
      return (interfaceOrientation == UIInterfaceOrientationPortrait); }
  
  @end
  </code></pre>
  
  <p>Header:</p>
  
  <pre><code>#import &lt;UIKit/UIKit.h&gt;
  
  @interface SecondViewController : UIViewController
  
  @end
  </code></pre>