Unity_UGUI的事件系统（借鉴大神，仅作为笔记用）
IPointerEnterHandler
指针进入
public void OnPointerEnter(PointerEventData eventData);
IPointerExitHandler
指针退出
public void OnPointerExit(PointerEventData eventData);
IPointerDownHandler
指针按下
public void OnPointerDown(PointerEventData eventData);
IPointerUpHandler
指针释放(可能按下时的指针位置跟释放时的指针位置不同，这里指的是按下时指针指着的物体)
public void OnPointerUp(PointerEventData eventData);
IPointerClickHandler
在同一物体上按下并释放
public void OnPointerClick(PointerEventData eventData);
IInitializePotentialDragHandler
拖拽时的初始化，跟IPointerDownHandler差不多，在按下时调用
public void OnInitializePotentialDrag(PointerEventData eventData);
IBeginDragHandler
开始拖拽
public void OnBeginDrag(PointerEventData eventData);
IDragHandler
拖拽中
public void OnDrag(PointerEventData eventData);
IEndDragHandler
拖拽结束(被拖拽的物体调用)
public void OnEndDrag(PointerEventData eventData);
IDropHandler
拖拽结束(拖拽结束后的位置(即鼠标位置)如果有物体，则那个物体调用)
public void OnDrop(PointerEventData eventData);
IScrollHandler
滚轮滚动
public void OnScroll(PointerEventData eventData);
IUpdateSelectedHandler
被选中的物体每帧调用
public void OnUpdateSelected(BaseEventData eventData);
ISelectHandler
物体被选中时(EventSystem.current.SetSelectedGameObject(gameObject))
public void OnSelect(BaseEventData eventData);
IDeselectHandler
物体从选中到取消选中时
public void OnDeselect(BaseEventData eventData);
IMoveHandler
物体移动时(与InputManager里的Horizontal和Vertica按键相对应)，前提条件是物体被选中
public void OnMove(AxisEventData eventData);
ISubmitHandler
提交按钮被按下时(与InputManager里的Submit按键相对应，PC上默认的是Enter键)，前提条件是物体被选中
public void OnSubmit(BaseEventData eventData);
ICancelHandler
取消按钮被按下时(与InputManager里的Cancel按键相对应，PC上默认的是Esc键)，前提条件是物体被选中
public void OnCancel(BaseEventData eventData);
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
总结：
1.共有17个接口方法
2.其中OnMove使用的参数是AxisEventData eventData
3.其中OnUpdateSelected、OnSelect 、OnDeselect 、OnSubmit 、OnCancel 使用的参数是BaseEventData eventData
4.其余使用的参数是PointerEventData eventData
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
实现事件的两种方式：
1.编辑器：添加Event Trigger组件
2.代码：继承EventTrigger，实现方法(EventTrigger继承了上面所说的接口)
using UnityEngine;
using System.Collections;
using UnityEngine.EventSystems;
public class TestUI3 : MonoBehaviour
{
private GameObject button;
private GameObject image;
void Start ()
{
button = GameObject.Find("Button");
image = GameObject.Find("Image");
EventTriggerListener.GetListener(button).onPointerClick += Click;
EventTriggerListener.GetListener(image).onDrag += Drag;
}
public void Click(GameObject go)
{
Debug.Log(go.name);
}
public void Drag(GameObject go)
{
Debug.Log(go.name);
}
}
using UnityEngine;
using System.Collections;
using UnityEngine.EventSystems;
public class EventTriggerListener : EventTrigger
{
#region 变量
//带参数是为了方便取得绑定了UI事件的对象
public delegate void PointerEventDelegate(GameObject go, PointerEventData eventData);
public delegate void BaseEventDelegate(GameObject go, BaseEventData eventData);
public delegate void AxisEventDelegate(GameObject go, AxisEventData eventData);
public event PointerEventDelegate onPointerEnter;
public event PointerEventDelegate onPointerExit;
public event PointerEventDelegate onPointerDown;
public event PointerEventDelegate onPointerUp;
public event PointerEventDelegate onPointerClick;
public event PointerEventDelegate onInitializePotentialDrag;
public event PointerEventDelegate onBeginDrag;
public event PointerEventDelegate onDrag;
public event PointerEventDelegate onEndDrag;
public event PointerEventDelegate onDrop;
public event PointerEventDelegate onScroll;
public event BaseEventDelegate onUpdateSelected;
public event BaseEventDelegate onSelect;
public event BaseEventDelegate onDeselect;
public event AxisEventDelegate onMove;
public event BaseEventDelegate onSubmit;
public event BaseEventDelegate onCancel;
#endregion
public static EventTriggerListener GetListener(GameObject go)
{
EventTriggerListener listener = go.GetComponent<EventTriggerListener>();
if (listener == null) listener = go.AddComponent<EventTriggerListener>();
return listener;
}
#region 方法
public override void OnPointerEnter(PointerEventData eventData)
{
if (onPointerEnter != null) onPointerEnter(gameObject, eventData);
}
public override void OnPointerExit(PointerEventData eventData)
{
if (onPointerExit != null) onPointerExit(gameObject, eventData);
}
public override void OnPointerDown(PointerEventData eventData)
{
if (onPointerDown != null) onPointerDown(gameObject, eventData);
}
public override void OnPointerUp(PointerEventData eventData)
{
if (onPointerUp != null) onPointerUp(gameObject, eventData);
}
public override void OnPointerClick(PointerEventData eventData)
{
if (onPointerClick != null) onPointerClick(gameObject, eventData);
}
public override void OnInitializePotentialDrag(PointerEventData eventData)
{
if (onInitializePotentialDrag != null) onInitializePotentialDrag(gameObject, eventData);
}
public override void OnBeginDrag(PointerEventData eventData)
{
if (onBeginDrag != null) onBeginDrag(gameObject, eventData);
}
public override void OnDrag(PointerEventData eventData)
{
if (onDrag != null) onDrag(gameObject, eventData);
}
public override void OnEndDrag(PointerEventData eventData)
{
if (onEndDrag != null) onEndDrag(gameObject, eventData);
}
public override void OnDrop(PointerEventData eventData)
{
if (onDrop != null) onDrop(gameObject, eventData);
}
public override void OnScroll(PointerEventData eventData)
{
if (onScroll != null) onScroll(gameObject, eventData);
}
public override void OnUpdateSelected(BaseEventData eventData)
{
if (onUpdateSelected != null) onUpdateSelected(gameObject, eventData);
}
public override void OnSelect(BaseEventData eventData)
{
if (onSelect != null) onSelect(gameObject, eventData);
}
public override void OnDeselect(BaseEventData eventData)
{
if (onDeselect != null) onDeselect(gameObject, eventData);
}
public override void OnMove(AxisEventData eventData)
{
if (onMove != null) onMove(gameObject, eventData);
}
public override void OnSubmit(BaseEventData eventData)
{
if (onSubmit != null) onSubmit(gameObject, eventData);
}
public override void OnCancel(BaseEventData eventData)
{
if (onCancel != null) onCancel(gameObject, eventData);
}
#endregion
}
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版权声明：本文为CSDN博主「小可_子衿」的原创文章，遵循CC 4.0 by-sa版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/c201038795050/article/details/77879877
————————————————
版权声明：本文为CSDN博主「小可_子衿」的原创文章，遵循CC 4.0 by-sa版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/c201038795050/article/details/77879877
————————————————
版权声明：本文为CSDN博主「小可_子衿」的原创文章，遵循CC 4.0 by-sa版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/c201038795050/article/details/77879877
