【UGUI】UGUI的事件监听

参考雨松的博客改写的UGUI 事件监听：http://www.xuanyusong.com/archives/3325；

可以像NGUI 一样用UIEventListener.get（）.OnClick = 方法;

下面附上代码

using UnityEngine;
using UnityEngine.EventSystems;

public class UIEventListener : MonoBehaviour, IPointerClickHandler,IPointerUpHandler,IPointerDownHandler,IPointerEnterHandler,IPointerExitHandler,ISelectHandler,IUpdateSelectedHandler
{
    public delegate void VoidDelegate(GameObject go);

    public delegate void IntDelegate(GameObject go, int index);

    public VoidDelegate onClick;
    public IntDelegate onIntClick;
    public VoidDelegate onDown;
    public VoidDelegate onEnter;
    public VoidDelegate onExit;
    public VoidDelegate onUp;
    public VoidDelegate onSelect;
    public VoidDelegate onUpdateSelect;

    [HideInInspector]
    private int index;

    static public UIEventListener Get(GameObject go)
    {
        UIEventListener listener = go.GetComponent<UIEventListener>();
        if (listener == null) listener = go.AddComponent<UIEventListener>();
        return listener;
    }

    static public UIEventListener Get(GameObject go, int i)
    {
        UIEventListener listener = go.GetComponent<UIEventListener>();
        if (listener == null) listener = go.AddComponent<UIEventListener>();
        listener.index = i;
        return listener;
    }

    public  void OnPointerClick(PointerEventData eventData)
    {
        if (onClick != null) onClick(gameObject);
        else if (onIntClick != null) onIntClick(gameObject, index);
    }
    public void OnPointerUp(PointerEventData eventData)
    {
        if (onUp != null) onUp(gameObject);
    }

    public void OnPointerDown(PointerEventData eventData)
    {
        if (onDown != null) onDown(gameObject);
    }

    public void OnPointerEnter(PointerEventData eventData)
    {
        if (onEnter != null) onEnter(gameObject);
    }

    public void OnPointerExit(PointerEventData eventData)
    {
        if (onExit != null) onExit(gameObject);
    }

    public void OnSelect(BaseEventData eventData)
    {
        if (onSelect != null) onSelect(gameObject);
    }

    public void OnUpdateSelected(BaseEventData eventData)
    {
        if (onUpdateSelect != null) onUpdateSelect(gameObject);
    }
    
}

下面就是 脚本中的执行

using UnityEngine;
using System.Collections;
using UnityEngine.UI;
public class ButtonTest : MonoBehaviour
{

    public GameObject btn_Test;

    void Start()
    {
        UIEventListener.Get(btn_Test).onClick = MyButtonEvent;
    }

    public void MyButtonEvent(GameObject button)
    {
        print("Test");
    }

}