GUI.SetNextControlName , GUI.FocusControl in IOS. Bug?

1 - ) Are GUI.SetNextControlName , GUI.FocusControl functions not supported in IOS ? Bug ? or what is problem ?

[Unity - Scripting API: GUI.FocusControl][1]

2-)TouchScreenKeyboard.hideInput does nothing in IOS

TouchScreenKeyboard.Open(string.Empty, TouchScreenKeyboardType.Default, false, false, false, false, "Write Your Message !");

Unity version : 4.5.5f1

I found bug on TouchScreenKeyboard.hideInput .When Player Settings → Status Bar Hidden is disable , TouchScreenKeyboard.hideInput function does not work.