GUI界面按钮组控制器 鼠标长按GUI按钮事件监听

using UnityEngine;
using UnityEngine.Events;
using UnityEngine.EventSystems;
using System.Collections;
using System;

/*
 * 长按按钮事件监听
 */
public class DirectBtnController : MonoBehaviour, IPointerDownHandler, IPointerUpHandler, IPointerExitHandler
{
    public float interval = 0.1f;

    [SerializeField]
    UnityEvent m_OnLongpress = new UnityEvent();//长按
    private bool isPointDown = false;
    private float lastInvokeTime;
    void Start()
    {
    }
    void Update()
    {
        if (isPointDown)
        {
            if (Time.time - lastInvokeTime > interval)
            {
                //触发点击  do soemthing
                m_OnLongpress.Invoke();
                lastInvokeTime = Time.time;
                Debug.Log("长按中...");               
            }
        }
    }
    public void OnPointerDown(PointerEventData eventData)
    {
        m_OnLongpress.Invoke();
        isPointDown = true;
        lastInvokeTime = Time.time;
    }
    public void OnPointerExit(PointerEventData eventData)
    {
        isPointDown = false;
    }
    public void OnPointerUp(PointerEventData eventData)
    {
        isPointDown = false;
    }
}