changing the height of UITabBar in iOS7/8?

Question

I am trying to change the height of the stock UITabBar to 44px, similar to Tweetbot's tab bar height. I've also seen a few other apps do this as well.

however, when i try to set the height it still remains the same

self.tabBar.frame.height = 40

are we not allowed to change the tab bar height? and if so what is a good alternative? using a toolbar?

Answer 1

SomeGuy's answer above worked for me. Here's the Swift translation for anyone who may need it. I made the height close to what it seems most popular apps use.

class TabBar: UITabBar {

     override func sizeThatFits(size: CGSize) -> CGSize {
         var sizeThatFits = super.sizeThatFits(size)
         sizeThatFits.height = 38

         return sizeThatFits
     }
}