c# - Create a simple button in Unity3D 2D mode -

i'm working on 2d game in unity 3d, v4.5. have added sprites hierarchy. how add button hierarchy? have designated button.png should display button. should turn sprite button?

what tried far:

• someone noted gui.button, but

  1: has done in code - assume can add buttons game ui inside unity gui (??)

  2: using gui.button script, class adds border around specified texture. haven't figured out how use existing image , size (width/height) of sprite texture sent gui.button.

you can useongui button , disappear rectangle have make new guistyle

    private guistyle teststyle = new guistyle();     public texture2d texture1;      void ongui(){      if( gui.button( new rect (0, 0, 100, 100) , texture1 ,teststyle) )         {           //dosomething if clicked on            }       } 

if dont want can raycasting selfand give buttons tags below

 void update () {          if (input.getmousebuttondown (0)) {               ray ray = camera.main.screenpointtoray(input.mouseposition);              raycasthit hit;               if (physics.raycast(ray, out hit)) {                if(hit.collider.tag=="play")                    //dosomething                }           }       } 

in unity 4.6 ui can add listeners buttons in script below

 private button mybutton = null; // assign in editor   void start()  {    mybutton.onclick.addlistener(() => { somefunction(); });    }