UITabBarItem not exactly on bottom

Question

I've created a custom tabbar but my tabbar isn't exactly on bottom of the screen. I don't know where the mistake can be...but on the bottom of the screen on a height of 2-3 pixels I see the standard tabbar (you can see a highlighted curves on active tabbaritem)...any ideas?

Same on all devices.

Here Screenshot:

Answer 1

Perhaps your background image just has the wrong size!? You cannot change the height of the tabbar. Its always 49 points high (in portrait). Means 98px in Retina.