Help Basketball Shooting Game

I made a game for Mac standalone and works perfectly. Now I am converting it to iOS and have 2 main issues.

1st for (var touch : iPhoneTouch in iPhoneInput.touches) { if (touch.phase == iPhoneTouchPhase.Began) and iPhoneTouchPhase.Ended for shooting. Now there are 3 players so I want the screen to be divided into 3 touch zones. How to do that?

2ndly I am getting this strange error. On function Start () I use ball1 = Instantiate (tempBasketBall, pos[0].position, pos[0].rotation); ball1.transform.parent = b1Parent;

But later to recreate the ball I use function MakeBall1(pos) { yield new WaitForSeconds(1); ball1 = Instantiate (tempBasketBall, pos[0].position, pos[0].rotation); ball1.transform.parent = b1Parent; canControl1 = true; } and it goes like slicing is not supported by type object

Its var pos : Transform [ ]; just btw

Please help :)