判断是否可以点击到某个层

public static bool IsEnableTouchLayer(Camera cameraSeeTheLayer, string layer)
{
    bool r = false;
    string strLayer = "";
    Vector3 posMouse = Input.mousePosition;
    posMouse.z = 10;

    Ray ray = cameraSeeTheLayer.ScreenPointToRay(posMouse);

    RaycastHit[] rhs;
    rhs = Physics.RaycastAll(ray);
    if (rhs != null)
    {
        foreach (RaycastHit rh in rhs)
        {
            GameObject gobjHit = rh.collider.gameObject;
            if (gobjHit != null)
                strLayer += LayerMask.LayerToName(gobjHit.layer);
        }
    }

    if (!string.IsNullOrEmpty(strLayer))
    {
        if (strLayer.Contains(layer))
        {
            r = true;
        }
    }
    return r;
}