unity Unity UI按钮 长按 简单实现

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.EventSystems;
public class DTKR_Down : UIBehaviour, IPointerDownHandler, IPointerUpHandler, IPointerExitHandler
{
	public bool isPointerDown = false;
	public bool longPressTriggered = false;
	public float timePressStarted;

	private void Update()
	{
		if (isPointerDown && !longPressTriggered)
		{
			Debug.Log("按下了");
			DTKR_DTKZ.Instance.Point_Down();//传递 一直按下的值
		}
	}

	public void OnPointerDown(PointerEventData eventData)
	{
		timePressStarted = Time.time;
		isPointerDown = true;
		longPressTriggered = false;
	}

	public void OnPointerUp(PointerEventData eventData)
	{
		longPressTriggered = true;
		isPointerDown = false;
	}

	public void OnPointerExit(PointerEventData eventData)
	{
		isPointerDown = false;
	}
}