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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