Jtro的技术分享:封装游戏按钮事件(悬浮,进入,点击)

首先,思路是这样,根据按钮的名称,获取到按钮的组件,然后再为按钮加上按钮事件
第一步,获取按钮的transform 可以放在你的工具类中

  /// <summary>
    /// 查找节点对象
    /// </summary>
    /// <param name="goParent">父对象的GameObject</param>
    /// <param name="childName">子对象</param>
    /// <returns></returns>
    public static Transform FindChildNode(GameObject goParent, string childName)
    {
        Transform searchTrans = null;
        searchTrans = goParent.transform.Find(childName);
        if (searchTrans == null)
        {
            //遍历父物体的所有子节点
            foreach (Transform item in goParent.transform)
            {
                searchTrans = FindChildNode(item.gameObject, childName);
                if (searchTrans != null)
                {
                    return searchTrans;
                }
            }
        }
        return searchTrans;
    }

这样使用递归算法获取你所需要查找的组件,然后在Getcomponent<Button>(),获取到button组件,
第二步,封装按钮事件,也就是重写按钮组件的3个方法

public class EventTriggerListener : EventTrigger
{
    public delegate void MyEventHandler(GameObject go);
    public MyEventHandler onClick;
    public MyEventHandler onMouseEnter;
    public MyEventHandler onMouseExit;

    public static EventTriggerListener GetListener (GameObject go)
    {
        EventTriggerListener eventTriggerListener = go.GetComponent<EventTriggerListener>();
        if (eventTriggerListener == null)
        {
            eventTriggerListener = go.AddComponent<EventTriggerListener>();
        }
        return eventTriggerListener;
    }  
    public override void OnPointerClick(PointerEventData eventData)
    {
        onClick?.Invoke(gameObject);
    }
    public override void OnPointerEnter(PointerEventData eventData)
    {
        onMouseEnter?.Invoke(gameObject);
    }
    public override void OnPointerExit(PointerEventData eventData)
    {
        onMouseExit?.Invoke(gameObject);
    }
}

然后是按钮的事件,可以直接调用

public class btnEvent : MonoBehaviour
{
    /// <summary>
    /// 注册按钮点击事件
    /// </summary>
    /// <param name="buttonName">按钮名称</param>
    /// <param name="myEventHandler">点击的事件</param>
    public static void RigisterButtonClickEvent(GameObject buttonObj, EventTriggerListener.MyEventHandler myEventHandler)
    {
        if (buttonObj != null)
        {
            EventTriggerListener.GetListener(buttonObj).onClick = myEventHandler;
        } 
    }
    /// <summary>
    /// 注册按钮悬停事件
    /// </summary>
    /// <param name="buttonName"></param>
    /// <param name="myEventHandler"></param>
  public  static void RigisterButtonEnterEvent(GameObject buttonObj, EventTriggerListener.MyEventHandler myEventHandler)
    {
        if (buttonObj !=null)
        {
            EventTriggerListener.GetListener(buttonObj).onMouseEnter = myEventHandler;
        }
    }
    /// <summary>
    /// 注册按钮离开事件
    /// </summary>
    /// <param name="buttonName"></param>
    /// <param name="myEventHandler"></param>
    public static void RigisterButtonExitEvent(GameObject buttonObj, EventTriggerListener.MyEventHandler myEventHandler)
    {
        if (buttonObj != null)
        {
            EventTriggerListener.GetListener(buttonObj).onMouseExit = myEventHandler;
        }
    }

调用的优雅代码:

 btnEvent.RigisterButtonClickEvent( Btnlogin.gameObject//按钮的名称, p => {
            Eventbtnlogin.Invoke();//按钮调用的方法
        });