UGUI_UI元素自定义交互事件
1.UGUI中支持的事件
MSDN链接：https://docs.unity3d.com/Manual/SupportedEvents.html
参考博文：http://blog.****.net/lyh916/article/details/44570503
2. 实现事件有两种方式：
a).编辑器：添加EventTrigger组件
b).代码：继承EventTrigger实现所需要的事件
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using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
public class CubeState
: EventTrigger{
//====================================================================================
//其它系列:
//OnSubmit、OnCancel、OnDrop、OnMove、OnScroll
//====================================================================================
//PC平台下按Enter键
public override void OnSubmit(BaseEventData
eventData)
{
Debug.Log("调用OnSubmit...");
}
//PC平台下按ESC键
public override void OnCancel(BaseEventData
eventData)
{
Debug.Log("调用OnCancel...");
}
//鼠标松开时
public override void OnDrop(PointerEventData
eventData)
{
Debug.Log("调用OnDrop...");
}
//物体在移动时(未测试)
public override void OnMove(AxisEventData
eventData)
{
Debug.Log("调用OnMove...");
}
//鼠标滚轮滚动的时候(未测试)
public override void OnScroll(PointerEventData
eventData)
{
Debug.Log("调用OnScroll...");
}
//====================================================================================
//Select系列:
//OnSelect、OnUpdateSelected、OnDeselect
//====================================================================================
//当被选中的时候调用一次
public override void OnSelect(BaseEventData
eventData)
{
Debug.Log("调用OnSelect...");
}
//在选中的时候每帧都会被调用
public override void OnUpdateSelected(BaseEventData
eventData)
{
//Debug.Log("调用OnUpdateSelected...");
}
//物体从选中状态到取消选中状态时会被调用
public override void OnDeselect(BaseEventData
eventData)
{
Debug.Log("调用OnDeselect...");
}
//====================================================================================
//Pointer系列：
//执行先后顺序:
//OnPointerDown>OnPointerEnter>OnPointerClick>OnPointerUp>OnPointerExit
//====================================================================================
//初始化拖拽时
public override void OnInitializePotentialDrag(PointerEventData
eventData)
{
Debug.Log("调用OnInitializePotentialDrag...");
}
//指针刚开始点击之后点击之后第一时间时
public override void OnPointerEnter(PointerEventData
eventData)
{
Debug.Log("调用OnPointerEnter...");
}
//在同一个物体上点击
public override void OnPointerClick(PointerEventData
eventData)
{
Debug.Log("调用OnPointerClick...");
}
//鼠标抬起
public override void OnPointerUp(PointerEventData
eventData)
{
Debug.Log("调用OnPointerUp...");
}
//鼠标按下
public override void OnPointerDown(PointerEventData
eventData)
{
Debug.Log("调用OnPointerDown...");
}
//结束的时候
public override void OnPointerExit(PointerEventData
eventData)
{
Debug.Log("调用OnPointerExit...");
}
//====================================================================================
//拖拽系列：
//OnBeginDrag、OnDrag、OnEndDrag
//====================================================================================
//开始拖拽
public override void OnBeginDrag(PointerEventData
eventData)
{
Debug.Log("调用OnBeginDrag...");
//Debug.Log("pointerPress："+eventData.pointerPress);
//Debug.Log("pressPosition；"
+ eventData.pressPosition);
ChangePositionByDrag(eventData);
}
//拖拽过程中
public override void OnDrag(PointerEventData
eventData)
{
//Debug.Log("调用OnDrag...");
ChangePositionByDrag(eventData);
}
//结束拖拽
public override void OnEndDrag(PointerEventData
eventData)
{
Debug.Log("调用OnEndDrag...");
ChangePositionByDrag(eventData);
}
//拖过拖拽变更自身坐标
void ChangePositionByDrag(PointerEventData
eventData) {
var rt
= gameObject.GetComponent<RectTransform>();
Vector3
globalMousePos;
if (RectTransformUtility.ScreenPointToWorldPointInRectangle(rt,
eventData.position, eventData.pressEventCamera, out globalMousePos))
{
rt.position
= globalMousePos;
}
}
}
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3.将事件究极封装起来
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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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调用：
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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);
}
}
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2.示例Demo
链接：http://pan.baidu.com/s/1kVbyVzT 密码：rauj