您应该使用Vector2.Lerp、Input.GetTouch和Touch.Position。下面是打印当前触摸位置的代码示例：

if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began)
{
    Debug.Log(Input.GetTouch(0).position);
}

现在，我们应该把这个加到世界上的某个位置上。我们可以使用Camera.ScreenPointToRay来处理这部分：

if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began)
{
    Ray ray = Camera.main.ScreenPointToRay(Input.GetTouch(0).position);
    RaycastHit2D hit;
    Physics2D.Raycast(ray, out hit);
    Debug.Log(hit.point);
}

在这里，我们实际上得到了你所按下的世界中的位置。然后，我们可以使用这个沿着Lerp将对象移动到位置：

public float scaleFactor = 0.2f; //how fast to move object.
public GameObject moving // drag the object you want to move in this slot.
public Vector2 Lerped;//Vector3 if you’re working in 3D.
public float time = 0f;
public bool lerping = false;
private Vector2 newPos = new Vector2();
//Vector3 if you’re working in 3D.

RaycastHit2D hit;//remove the 2D after RaycastHit if you are in 3D. If you are in 2D, leave it.
float dist;
...
if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began)
{
    Ray ray = Camera.main.ScreenPointToRay(Input.GetTouch(0).position);
    Physics2D.Raycast(ray, out hit);//same with this one. Remove the 2D if you are in 3D.
    Debug.Log(hit.point);
    dist = Vector2.Distance(moving.transform.position, hit.point);
    //Vector3 if you’re in 3D.
    lerping = true;
}
if (lerping)
{
    time += Time.deltaTime * dist * scaleFactor;
    lerp(hit.point.x, hit.point.y, hit.point.z);
    //remove hit.point.z if you are in 2D.
}
else
{
    time = 0f;
}
if (moving.transform.position == new Vector3(hit.point.x, hit.point.y, hit.point.z);
//remove hit.point.z if in 2D, and switch Vector3 to Vector2 if in 2D.
{
    lerping = false;
}
moving.transform.position = newPos;

然后在剧本的另一部分：

public void lerp(float x, float y, float z)
//remove the float z and the comma before it if you are in unity 2d.
{
    Vector3 pos = new Vector3(x, y, z);
    //Vector2 and no z if you’re in 2D.

    newPos = Vector2.Lerp(moveObj, pos, time);
    //Vector3 if in 3D.
}

这是一个相当大的脚本，很难解释，所以我会这样说：按照注解的要求做，如果有错误请告诉我。我还没有真正测试过这个脚本，所以如果有人注意到它们，请告诉我。
现在，脚本做什么：基本上，它会得到你触摸的点，并使玩家慢慢地向它移动（速度会随着距离和scaleFactor变量的变化而变化，你可以改变这个变量）。