title: IOS 5 MBProgressHUD disable tab bar buttons while loading data. (userInteractionEnabled = NO)
body: <p>I use <code>MBProgressHUD</code> when loading data and user can press the another tab button during the process. <code>MBProgressHUD</code> only disable the view contents.
  I checked other posts but didn't see anything helps me to disable the tab button.</p>
  
  <p>I tried to set <code>tabbaritem.userInteractionEnabled</code> to <code>NO</code> but I couldn't find a way to access that. I can do it in storyboard but can't switch it back to <code>YES</code>.</p>
  
  <p>My question is; from my viewController is there any way to access <code>tabbarcontroller.tabbaritem.userInteractionEnabled</code> ? </p>