In Unity3d How detect touch on UI or not?

Question

In make Unity3d mobile application. And I have a problem: How detect touch on UI or not?

I try this (but now work)

UnityEngine.EventSystems.EventSystem.current.IsPointerOverGameObject()

and this

private static List<RaycastResult> tempRaycastResults = new List<RaycastResult>();

public bool PointIsOverUI(float x, float y)
{
    var eventDataCurrentPosition = new PointerEventData(EventSystem.current);

    eventDataCurrentPosition.position = new Vector2(x, y);

    tempRaycastResults.Clear();

    EventSystem.current.RaycastAll(eventDataCurrentPosition, tempRaycastResults);

    return tempRaycastResults.Count > 0;
}

Answer 1

Please try this :

// for Android check differently :

if(EventSystem.current.IsPointerOverGameObject(0) return false;

// for windows check as usual :

if (EventSystem.current.IsPointerOverGameObject())
return false;

Answer 2

Add this to the clickable object

private MyUIHoverListener uiListener;
private Vector3 mousePos;
    
private void OnMouseDown()
{
    mousePos = Input.mousePosition;
    Debug.Log(Input.mousePosition);
}
private void OnMouseUp()
{
  //this part helps to not trigger object when dragging
    mousePos -=  Input.mousePosition;
  //Debug.Log(mousePos);
    
if(mousePos.x < 3 && mousePos.y < 3 && mousePos.z < 3 && mousePos.x > -3 && 
mousePos.y > -3 && mousePos.z > -3)
{
 //Debug.Log("NOT MOVED");
 if (!GameMan.ObjectClickBlocker)
 {
  if (uiListener.IsUIOverride)
  {
  //   Debug.Log("Cancelled OnMouseDown! A UI element has override this object!");
 }
 else
 {
 // Debug.Log("Object OnMouseDown");
 StartCoroutine(LoadThisBuilding( 0));
 ToggleBuildingMenu();  
 }
}
}
}

Add this on the object in front of the clickable object:

public class MyUIHoverListener : MonoBehaviour
{
[SerializeField]
public bool IsUIOverride { get; private set; }

void Update()
{
// It will turn true if hovering any UI Elements
IsUIOverride = EventSystem.current.IsPointerOverGameObject();
}
void OnDisable()
 {
 IsUIOverride = false;}
}