title: Go to rootView when tabBar tapped
body: <p>I used view based app &amp; in that i programmatically generate TabBar.
  Problem is:</p>
  
  <p>I have an Iphone application in which i have 2 tabitems with a tabbarcontroller.Inside the tabbarcontroller each viewcontroller is a navigation controller.when selecting the second tab i have a view controller.when selecting a button on that i am pushing another view controller to the self.navigation controller.and in that viewcontroller i am pushing and go like that.But the problem is when i am selecting the tabitem again that pushedviewcotrooller is shown there.but i need that rootview there again when i am selecting the tab</p>
  
  <p>my code in AppDelegate.m is:</p>
  
  <pre><code>- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
  {
      self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
  
   UINavigationController *nc1;
      nc1 = [[UINavigationController alloc] init];
  
  UIViewController *viewController1 = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];
      nc1.viewControllers = [NSArray arrayWithObjects:viewController1, nil];
  
  
  
  
  
      UINavigationController *nc2;
      nc2 = [[UINavigationController alloc] init];
  
   UIViewController *viewController2 = [[[secondview alloc] initWithNibName:@"secondview" bundle:nil] autorelease];
      nc2.viewControllers = [NSArray arrayWithObjects:viewController2, nil];
  
  
      self.tabBarController = [[[UITabBarController alloc] init] autorelease];
     self.tabBarController.viewControllers = [NSArray arrayWithObjects:nc1,nc2,nil];
    self.window.rootViewController=self.tabBarController;
      [self.window makeKeyAndVisible];
      return YES;
  }
  </code></pre>