unity3d UGUIG Button事件的监听

using UnityEngine;
using System.Collections;
using UnityEngine.EventSystems;
public class EventTriggerListener : UnityEngine.EventSystems.EventTrigger
{
    public delegate void VoidDelegate(GameObject go);
    public VoidDelegate onClick;
    public VoidDelegate onDown;
    public VoidDelegate onEnter;
    public VoidDelegate onExit;
    public VoidDelegate onUp;
    public VoidDelegate onSelect;
    public VoidDelegate onUpdateSelect;

    static public EventTriggerListener Get(GameObject go)
    {
        EventTriggerListener listener = go.GetComponent<EventTriggerListener>();
        if (listener == null) listener = go.AddComponent<EventTriggerListener>();
        return listener;
    }
    public override void OnPointerClick(PointerEventData eventData)
    {
        if (onClick != null) onClick(gameObject);
    }
    public override void OnPointerDown(PointerEventData eventData)
    {
        if (onDown != null) onDown(gameObject);
    }
    public override void OnPointerEnter(PointerEventData eventData)
    {
        if (onEnter != null) onEnter(gameObject);
    }
    public override void OnPointerExit(PointerEventData eventData)
    {
        if (onExit != null) onExit(gameObject);
    }
    public override void OnPointerUp(PointerEventData eventData)
    {
        if (onUp != null) onUp(gameObject);
    }
    public override void OnSelect(BaseEventData eventData)
    {
        if (onSelect != null) onSelect(gameObject);
    }
    public override void OnUpdateSelected(BaseEventData eventData)
    {
        if (onUpdateSelect != null) onUpdateSelect(gameObject);
    }
}

using System;
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using UnityEngine.UI;

public class ButtonOnClick : MonoBehaviour
{
    private Transform trans;
    private Button[] but;
    private Transform hk;

    public Action ClickButton;

    void Awake()
    {
        trans = transform.FindChild("PropertyPanel/Content/FighterProperty/FighterGrid");
        hk = GameObject.Find("SelectedImage").transform;
        but = trans.GetComponentsInChildren<Button>();
    }

    /// <summary>
    /// 初始化绑定事件
    /// </summary>
    void Start()
    {
        foreach (var button1 in but)
        {
            EventTriggerListener.Get(button1.gameObject).onClick = OnButtonClick;
        }
    }

    /// <summary>
    /// 监听事件
    /// </summary>
    /// <param name="buttonGO"></param>
    private void OnButtonClick(GameObject buttonGO)
    {
        //在这里监听按钮的点击事件
        Debug.LogError(buttonGO.gameObject.name);
        hk.transform.parent = buttonGO.transform;
        hk.transform.localPosition = Vector3.zero;
    }


}