Question

Here i am trying to dynamically add and remove the tab from uitabbarcontroller .

As well as replace them . My apps situation is as below.

First view is Logon and about

After successful logon new 3 tabs . With last as More and two other .

In more Logoff option is there after selecting this i want to remove the last tab and

replace first two with again logon and About. i.e (Home View)

So in my code i m doing like this ……..

///AppDelegate.m

• (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

  // Override point for customization after application launch.

  self.window.rootViewController = tabBarCntr;
  tabBarCntr=[[UITabBarController alloc]init];
  LogonViewController *logon=[[LogonViewController alloc]init];
  logon.tabBarItem.title=@”Logon”;
  AboutViewController *about=[[AboutViewController alloc]init];
  about.tabBarItem.title=@”About”;
  tabBarCntr.viewControllers=[NSArray arrayWithObjects:sos1,about,nil];
  [logon release];
  [about release];

  [self.window addSubview:tabBarCntr.view];

  [self.window makeKeyAndVisible];
  }

and in my IBAction after logon successful setting new viewcontrollers to tabbarcontroller

self.tabBarController.viewControllers=[NSArray

arrayWithObjects:newController1,newController2,more,nil];

    Now in my loggoff i coding something like.....
       NSMutableArray *newArray;   
     newArray=[NSMutableArray arrayWithArray:self.tabBarController.viewControllers];
       [newArray replaceObjectAtIndex:0 withObject:logon];
       [newArray replaceObjectAtIndex:1 withObject:about];
       [newArray removeLastObject];
       self.tabBarController.selectedIndex=0;
       [self.tabBarController setViewControllers : newArray];


  but my applcation crash here after this ....
 can any has solution for this ...

Thnx in advance.

Paggyyyyy

Edit: NSMutableArray arrayWithArray added space to fix code

Answer 1

In my opinion, you use 2 separate tabBarControllers. one for login and other for app. once you login remove & release the login tab and add app tab. And again after logout remove & release app tab and add the login tab.
This will be easier to access tabs, instead of removing/adding viewcontrollers, renaming tabs, changing tab images.