PointerEventData.pointerId

描述

指针的标识。

使用鼠标时，pointerId 会返回 -1、-2 或 -3。这些值分别对应鼠标左键、右键和中键。在移动版本（如 iPad、iPhone 或 Android）上使用触摸屏时，多点触摸的范围是从 0 到设备支持的多点触摸数量。

using UnityEngine;
using UnityEngine.EventSystems;

/*To use the OnPointerDown, you must inherit from the IPointerDownHandler
and declare the function as public*/
public class Test : MonoBehaviour, IPointerDownHandler
{
    /*Called whenever a mouse click or touch screen tap is registered
    on the UI object this script is attached to.*/
    public void OnPointerDown(PointerEventData eventData)
    {
        int clickID = eventData.pointerId;

        if (clickID == -1)
        {
            Debug.Log("Left mouse click registered");
        }
        else if (clickID == -2)
        {
            Debug.Log("Right mouse click registered");
        }
        else if (clickID == -3)
        {
            Debug.Log("Center mouse click registered");
        }
        else if (clickID == 0)
        {
            Debug.Log("Single tap registered");
        }
        else if (clickID == 1)
        {
            Debug.Log("Double tap registered");
        }
        else if (clickID == 2)
        {
            Debug.Log("Triple tap registered");
        }
    }
}

using UnityEngine;
using UnityEngine.EventSystems;

/*To use the OnPointerDown, you must inherit from the IPointerDownHandler
and declare the function as public*/
public class Test : MonoBehaviour, IPointerDownHandler
{
    /*Called whenever a mouse click or touch screen tap is registered
    on the UI object this script is attached to.*/
    public void OnPointerDown(PointerEventData eventData)
    {
        switch (eventData.pointerId)
        {
            case -1:
                Debug.Log("Left mouse click registered");
                break;
            case -2:
                Debug.Log("Right mouse click registered");
                break;
            case -3:
                Debug.Log("Center mouse click registered");
                break;
            case 0:
                Debug.Log("Single tap registered");
                break;
            case 1:
                Debug.Log("Double tap registered");
                break;
            case 2:
                Debug.Log("Triple tap registered");
                break;
        }
    }
}