UGUI的鼠标事件：EventTrigger
自己写一个帮助类，便于调用（用回调，对相应鼠标事件添加事件，方便书写）
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
/// <summary>
/// 鼠标事件监听
/// </summary>
public class UIEventListener : EventTrigger
{
public delegate void PointerEventDelegate(PointerEventData eventData);
public PointerEventDelegate PointerEnterEvent;
public PointerEventDelegate PointerExitEvent;
public PointerEventDelegate PointerClickEvent;
public PointerEventDelegate PointerDownEvent;
public PointerEventDelegate PointerUpEvent;
public PointerEventDelegate BeginDragEvent;
public PointerEventDelegate OnDragEvent;
public PointerEventDelegate EndDragEvent;
public static UIEventListener GetEventListener(GameObject item)
{
UIEventListener uIEvent = null;
if (item != null)
{
uIEvent = item.AddComponent<UIEventListener>();
}
return uIEvent;
}
/// <summary>
/// 鼠标划入
/// </summary>
/// <param name="eventData"></param>
public override void OnPointerEnter(PointerEventData eventData)
{
base.OnPointerEnter(eventData);
PointerEnterEvent?.Invoke(eventData);
}
/// <summary>
/// 鼠标移出
/// </summary>
/// <param name="eventData"></param>
public override void OnPointerExit(PointerEventData eventData)
{
base.OnPointerExit(eventData);
PointerExitEvent?.Invoke(eventData);
}
/// <summary>
/// 鼠标点击
/// </summary>
/// <param name="eventData"></param>
public override void OnPointerClick(PointerEventData eventData)
{
base.OnPointerClick(eventData);
PointerClickEvent?.Invoke(eventData);
}
/// <summary>
/// 鼠标抬起
/// </summary>
/// <param name="eventData"></param>
public override void OnPointerDown(PointerEventData eventData)
{
base.OnPointerDown(eventData);
PointerDownEvent?.Invoke(eventData);
}
/// <summary>
/// 鼠标抬起
/// </summary>
/// <param name="eventData"></param>
public override void OnPointerUp(PointerEventData eventData)
{
base.OnPointerUp(eventData);
PointerUpEvent?.Invoke(eventData);
}
/// <summary>
/// 开始拖拽
/// </summary>
/// <param name="eventData"></param>
public override void OnBeginDrag(PointerEventData eventData)
{
base.OnBeginDrag(eventData);
BeginDragEvent?.Invoke(eventData);
}
/// <summary>
/// 拖拽中
/// </summary>
/// <param name="eventData"></param>
public override void OnDrag(PointerEventData eventData)
{
base.OnDrag(eventData);
OnDragEvent?.Invoke(eventData);
}
/// <summary>
/// 拖拽结束
/// </summary>
/// <param name="eventData"></param>
public override void OnEndDrag(PointerEventData eventData)
{
base.OnEndDrag(eventData);
EndDragEvent?.Invoke(eventData);
}
}
