iOS Customizing UITabBar

[jguru]

How can I customize the UITabBar? In certain Views I want to hide the tab bar.. and also I want to change the alpha value .. u can do this in IB but I want to do it via code.. any ideas?

 

[lawicko]

I have the same problem here I want to change the alpha and opaque property values, but I don't use IB to create interface. So how can one do it via code? Maybe someone has the answer now?