title: viewbased application with tabbarcontroller
body: <p>Im a newbie in ios ,  my app is a single view application (nib), the first view has 2 buttons , the first one open a uiview with 4 buttons , every button open a tabbar , (thats mean 4 bar button items ) , </p>
  
  <p>the views up show o.k.</p>
  
  <p>at the second button in the first view , a view shows with 3 buttons every button open a tabbar , (thats mean 3 bar button items ) , the problem that when I pressed one of these 3 buttons the app get crashed and shows the error ([UITabBarController presentModalViewController:animated:completion:]: unrecognized selector sent to instance..)</p>
  
  <p>I did the step at the second bar as what i did in the first ! </p>
  
  <pre><code>-(IBAction)goabout{
   UIViewController *view1 = [[[about alloc] initWithNibName:@"about" bundle:nil] autorelease];
  UIViewController *view2 = [[[collages alloc] initWithNibName:@"collages" bundle:nil] autorelease];
  UIViewController *view3 = [[[centers alloc] initWithNibName:@"centers" bundle:nil] autorelease];
     self.tabBarControllerr = [[UITabBarController alloc] init];
     self.tabBarControllerr.viewControllers = [NSArray arrayWithObjects: view1,   view2,view3, nil];
     [self.tabBarController  setSelectedIndex:0];
     [self.tabBarControllerr presentModalViewController:tabBarControllerr animated:NO completion:nil];
  
     }
  </code></pre>
  
  <p>any help please? 
  thank you </p>