Is it possible to change the width of UITabbarItem in UITabbar and margins between each UITabbarItem for iPad Application?
The problem is that standard margins are too large for my layout - client want tabs to be more compact :/
Or should I mess with UIToolbar to achieve this goal?
You cannot change the width of the the UITabBarItem, and you cannot do this even after subclassing the UITabBarItem. Apple has certain restrictions in the way they want the developers to implement the applications.
You will need to use a UIToolBar for this, and my best bet is for you to go to github and as there a lot of sample applications which use a scrollable UIToolBar at the bottom instead of the UITabBar.