title: assignment to readonly property
body: <p>This has been working just fine fore about 4 hours and i didn't even touch it but now I'm getting an assignment to readonly property and _tabBarController? Did you mean UITabBarController? What i had did was take this from the appdelegate because i added a login screen, at the login screen i haven't coded it so i just made the submit button on the login screen run the tabview part of my application. So I don't know what i did like i said its been working for a long time like that. Anyone have any ideas? </p>
  
  <pre><code>- (IBAction)submit:(id)sender
  {
  UIViewController *viewController1 = [[[FirstViewController alloc] initWithNibName:@"FirstViewController" bundle:nil] autorelease];
  UIViewController *viewController2 = [[[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil] autorelease];
  UIViewController *viewController3 = [[[AlarmViewController alloc] initWithNibName:@"AlarmViewController" bundle:nil] autorelease];
  UIViewController *viewController4 = [[[BusPassViewController alloc] initWithNibName:@"BusPassViewController" bundle:nil]autorelease];
  self.tabBarController = [[[UITabBarController alloc] init] autorelease];
  self.tabBarController.viewControllers = @[viewController1, viewController2, viewController3, viewController4];
  [self presentViewController:_tabBarController animated:YES completion:nil];
  </code></pre>
  
  <p>}</p>