UGUI脚本添加Btn回调的方法

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;//对添加这个脚本的对象添加EventTrigger组件
[RequireComponent(typeof(UnityEngine.EventSystems.EventTrigger))]
public class BtnPointClick : MonoBehaviour {Button btn;EventTrigger.Entry beginClick;EventTrigger.Entry pointClick;EventTrigger.Entry endClick;EventTrigger eventTrigger;void Awake(){btn = this.GetComponent();eventTrigger = this.GetComponent();beginClick = new EventTrigger.Entry();pointClick = new EventTrigger.Entry();endClick = new EventTrigger.Entry(); }void Start () {beginClick.eventID = EventTriggerType.PointerDown;pointClick.eventID = EventTriggerType.PointerClick;endClick.eventID = EventTriggerType.PointerUp;//注册事件回调beginClick.callback = new EventTrigger.TriggerEvent();pointClick.callback = new EventTrigger.TriggerEvent();endClick.callback = new EventTrigger.TriggerEvent();//添加事件监听beginClick.callback.AddListener(BeginClickEvent);pointClick.callback.AddListener(PointClickEvent);endClick.callback.AddListener(EndClickEvent);//添加事件到委托事件eventTrigger.triggers.Add(beginClick);eventTrigger.triggers.Add(pointClick);eventTrigger.triggers.Add(endClick);}///

/// 开始点击的事件回调///

///

private void BeginClickEvent(BaseEventData data){Debug.Log("开始点击");}///

/// 点击的事件回调///

///

private void PointClickEvent(BaseEventData data){Debug.Log("点击事件");}///

/// 鼠标抬起的事件回调///

///

private void EndClickEvent(BaseEventData data){Debug.Log("鼠标抬起事件");}
}