UGUI之控件以及按钮的监听事件系统

 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 UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 using UnityEngine.EventSystems;
 using UnityEngine.Events;
 public class UIMain : MonoBehaviour {
     Button    button;
     Image image;
     void Start ()
     {
         button = transform.Find("Button").GetComponent<Button>();
         image = transform.Find("Image").GetComponent<Image>();
         EventTriggerListener.Get(button.gameObject).onClick =OnButtonClick;
         EventTriggerListener.Get(image.gameObject).onClick =OnButtonClick;
     }

     private void OnButtonClick(GameObject go){
         //在这里监听按钮的点击事件
         if(go == button.gameObject){
             Debug.Log ("DoSomeThings");
         }
     }
 }

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