在角色控制器中添加触摸控制?Unity2d

得到了这个简单的角色控制器，可以通过翻转来左右移动我的平台角色。

我希望有人能集成或告诉我如何添加触摸控制android/ios。

只要点击屏幕左侧就可以向左移动，点击屏幕右侧就可以向右移动。

感谢

using UnityEngine;
using System.Collections;
public class RobotController : MonoBehaviour {
//This will be our maximum speed as we will always be multiplying by 1
public float maxSpeed = 2f;
//a boolean value to represent whether we are facing left or not
bool facingRight = false;
//a value to represent our Animator
Animator anim;
// Use this for initialization
void Start () {
    //set anim to our animator
    anim = GetComponent<Animator>();
}
// Update is called once per frame
void FixedUpdate () {
    float move = Input.GetAxis ("Horizontal");//Gives us of one if we are moving via the arrow keys
    //move our Players rigidbody
    rigidbody2D.velocity = new Vector3 (move * maxSpeed, rigidbody2D.velocity.y);
    //set our speed
    anim.SetFloat ("Speed",Mathf.Abs (move));
    //if we are moving left but not facing left flip, and vice versa
    if (move < 0 && !facingRight) {
        Flip ();
    } else if (move > 0 && facingRight) {
        Flip ();
    }
}
//flip if needed
void Flip(){
    facingRight = !facingRight;
    Vector3 theScale = transform.localScale;
    theScale.x *= -1;
    transform.localScale = theScale;
}
}

foreach(Touch touch in Input.touches)
{
    if(leftButton.HitTest(touch.position))
    {
        //move character left
    }
    if(rightButton.HitTest(touch.position))
    {
        //move character right
    }
}