Hi, I've just uploaded to GitHub the Input Manager I use for my games.
It allows you to use NGUI buttons like Unity native Input. Example:
_GTInputManager.GetButton("ButtonName");
_GTInputManager is the reference to the manager on Scene. This code will return true while the button called ButtonName is Pressed. Yes, you can know when a button is hold and you can also use:
_GTInputManager.GetButtonDown("ButtonName");
and just when true the first time the button is pressed.
Feel free to use it or suggest changes.
https://github.com/bitomule/GTInput
