When pressing a button, it counts as pressing the screen and the button. How do I fix this.

Questions & Answers
1

I am creating a mobile game where if the player taps the screen, a ball drops from the top of the screen. The problem is with the UI. When I tap the pause, settings, or home buttons, it still counts it as tapping the screen and a ball drops. I want to make it so that when you press a button, it counts as tapping just the button and not both the screen and the button.

2

Found in this post: UI buttons and touch input problem - Questions & Answers - Unity Discussions

In your Update(), make your check for finger press like:

            foreach (Touch touch in Input.touches)
            {
                if (touch.fingerId == 0)
                {
                    if (Input.GetTouch(0).phase == TouchPhase.Began)
                    {
                        if (!IsPointerOverUIObject(Input.GetTouch(0)))
                            DoTheThing();
                    }
                }
            }

Then make a separate method IsPointerOverUIObject():

private bool IsPointerOverUIObject(Touch touch)
    {

        PointerEventData eventDataCurrentPosition = new PointerEventData(EventSystem.current);
        eventDataCurrentPosition.position = new Vector2(touch.position.x, touch.position.y);

        List<RaycastResult> results = new List<RaycastResult>();
        EventSystem.current.RaycastAll(eventDataCurrentPosition, results);
        return results.Count > 0;
    }