Forcing TouchKeyboard Orientation

I'm trying to make an app that works both portrait and landscape but I can't enable autorotate as the app is like the iOS camera where only the icons rotate with screen orientation and the bars at the top and bottom remain the same.

I've got that working but my problem is now with input fields the keyboard always comes up portrait as that's the way the orientation is locked. Is there anyway to force the orientation of the keyboard to landscape?

I'm also using NGUI so I'm using the UIInput script for the input fields.