Instagram like tab bar

hey everyone,

followed tutorial on how make tab bar 1 on instagram (http://idevrecipes.com/2010/12/16/raised-center-tab-bar-button/#comment-985)

have functioning inside app but, having trouble getting tabs go view controllers , tab bar work tab bar.
right now, tab bar appears on screen black background. (attached screenshot)

if download project , go baseviewcontroller.m see following code

code:

    -(uiviewcontroller*) viewcontrollerwithtabtitle:(nsstring*) title image:(uiimage*)image  {    uiviewcontroller* viewcontroller = [[[uiviewcontroller alloc] init] autorelease];    viewcontroller.tabbaritem = [[[uitabbaritem alloc] initwithtitle:title image:image tag:0] autorelease];    return viewcontroller;  }  

which believe sets tab bar code in instagramviewcontroller.m

code:

   self.viewcontrollers = [nsarray arraywithobjects:                              [self viewcontrollerwithtabtitle:@"feed" image:[uiimage imagenamed:@"112-group.png"]],                              [self viewcontrollerwithtabtitle:@"popular" image:[uiimage imagenamed:@"29-heart.png"]],                              [self viewcontrollerwithtabtitle:@"share" image:nil],                              [self viewcontrollerwithtabtitle:@"news" image:[uiimage imagenamed:@"news.png"]],                              [self viewcontrollerwithtabtitle:@"@user" image:[uiimage imagenamed:@"123-id-card.png"]], nil];  

i pretty sure need replace code

code:

  self.window = [[[uiwindow alloc] initwithframe:[[uiscreen mainscreen] bounds]] autorelease];      // override point customization after application launch.      uiviewcontroller *viewcontroller1, *viewcontroller2;      if ([[uidevice currentdevice] userinterfaceidiom] == uiuserinterfaceidiomphone) {          viewcontroller1 = [[[firstviewcontroller alloc] initwithnibname:@"firstviewcontroller_iphone" bundle:nil] autorelease];          viewcontroller2 = [[[secondviewcontroller alloc] initwithnibname:@"secondviewcontroller_iphone" bundle:nil] autorelease];      }       self.tabbarcontroller = [[[uitabbarcontroller alloc] init] autorelease];      self.tabbarcontroller.viewcontrollers = [nsarray arraywithobjects:viewcontroller1, viewcontroller2, nil];      self.window.rootviewcontroller = self.tabbarcontroller;      [self.window makekeyandvisible];      return yes;  

am on right track? suggestions?

 

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