Unity Movement Help

Question

i am making script something like in swing copters when player moves to Left to right when you touch the screen , but its on X asis , i made my script on Y Axis , But it only goes down when i touch screen , it just doesnt go up at all , Please help

void MovePlayerOnYAxis()
    {

        foreach (Touch touch in Input.touches)
        {

            WasTouched = !WasTouched;


            if (WasTouched)
            {
                if (Input.touchCount == 0)
                {
                    WasTouched = false;

                    transform.localScale = new Vector3(1, 1, 1);
                }
            }
            else
            {
                if (Input.touchCount > 0)
                {
                    WasTouched = true;
                    transform.localScale = new Vector3(1,-1, 1);
                }

            }
            huongbay = transform.localScale.y;

        }
        transform.root.Translate(Vector3.up * speed * huongbay * Time.deltaTime);
    }

Input script

bool WasTouchedOrClicked()
    {
        if(Input.GetButtonUp("Jump") || Input.GetMouseButtonDown(0) ||
         (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began))
            return true;
        else
            return false;
        }

Answer 1

I would say it's because you always toggle the WasTouched flag. Try removing the line:

WasTouched = !WasTouched;

Answer 2

This looks like a copy-paste error from an earlier answer. What the other user intended you to write was something more like this:

bool wasTouched = false;
float direction = 1f;

void MovePlayerOnYAxis()
{


    if (wasTouched)
    {
        if (Input.touchCount == 0)
        {
            WasTouched = false;
            direction = 1f; // up
        }
    }
    else
    {
         if (Input.touchCount > 0)
         {
             WasTouched = true;
             direction = -1f; // down
         }
     }

    transform.root.Translate(
           Vector3.up * speed * direction * Time.deltaTime, 
           Space.World);
}

As discussed in the comments above, the behaviour you've described should only depend on whether the screen was touched - not how many touches there are. So, you don't want to loop over every touch with a foreach - running this logic just once is enough.

In fact, if all you want to do is go down when there's at least one touch, you can simplify this massively to:

void MovePlayerOnYAxis()
{
    float direction = Input.touchCount > 0 ? -1f : 1f;

    transform.root.Translate(
       Vector3.up * speed * direction * Time.deltaTime, 
       Space.World);
 }