Article directory
1.Event forwarding
Mounted on the UI, when clicked, the key event will be forwarded downward, core PassEvent, reference link
using UnityEngine;
using System.Collections;
using UnityEngine.EventSystems;
using UnityEngine.UI;
using System.Collections.Generic;
public class Test : MonoBehaviour,IPointerClickHandler ,IPointerDownHandler,IPointerUpHandler
{
//监听按下
public void OnPointerDown(PointerEventData eventData)
{
PassEvent(eventData,ExecuteEvents.pointerDownHandler);
}
//监听抬起
public void OnPointerUp(PointerEventData eventData)
{
PassEvent(eventData,ExecuteEvents.pointerUpHandler);
}
//监听点击
public void OnPointerClick(PointerEventData eventData)
{
PassEvent(eventData,ExecuteEvents.submitHandler);
PassEvent(eventData,ExecuteEvents.pointerClickHandler);
}
//把事件透下去
public void PassEvent<T>(PointerEventData data,ExecuteEvents.EventFunction<T> function)
where T : IEventSystemHandler
{
List<RaycastResult> results = new List<RaycastResult>();
EventSystem.current.RaycastAll(data, results);
GameObject current = data.pointerCurrentRaycast.gameObject ;
for(int i =0; i< results.Count;i++)
{
if(current!= results[i].gameObject)
{
ExecuteEvents.Execute(results[i].gameObject, data,function);
//RaycastAll后ugui会自己排序，如果你只想响应透下去的最近的一个响应，这里ExecuteEvents.Execute后直接break就行。
}
}
}
}
2. Event non-interception (recommended)
The core is the unity interface ICanvasRaycastFilter
Reference Code:
using System;
using System.Linq;
using UnityEngine;
using UnityEngine.UI;
[RequireComponent(typeof(Image))]
[RequireComponent(typeof(Button))]
[RequireComponent(typeof(RectTransform))]
public class GestureControl : MonoBehaviour, ICanvasRaycastFilter
{
public bool NatureDestory = false;
public bool Osmosis = true;
public bool Strong = false;
private bool _onceEnter = true;
private Camera _uiCamera;
private RectTransform tarRect;
public event Action ClickEvent;
public event Action InterruptEvent;
public bool IsRaycastLocationValid(Vector2 sp, Camera eventCamera)
{
if (_uiCamera == null)
{
return false;
}
if (tarRect == null)
{
return true;//不渗透，遮罩
}
bool isContain = RectTransformUtility.RectangleContainsScreenPoint(tarRect, sp, _uiCamera);
if (isContain)
{
if (Input.GetMouseButtonUp(0) && _onceEnter)
{
_onceEnter = false;
NatureDestory = true;
//按下事件，销毁遮罩自身，需要避免多次销毁
GameObject.Destroy(this.gameObject, 0.1f);
}
return false;
}
return true;//不渗透，遮罩
}
private void OnDestroy()
{
if (ClickEvent != null)
{
ClickEvent();
}
if (!NatureDestory)
{
//非点击自然销毁，调用中断
Debug.Log("非自然中断");
InterruptEvent();
}
}
// Start is called before the first frame update
private void Start()
{
tarRect = this.GetComponent<RectTransform>();
this.GetComponent<ParticleSystem>().Play();
var cameras = GameObject.FindObjectsOfType<Camera>();
_uiCamera = cameras.Where(p => p.name == "UICamera").First();
//是否强制引导
}
}
3.UiFilter two kinds of penetration together
using System;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;
[RequireComponent(typeof(Image))]
[RequireComponent(typeof(Button))]
[RequireComponent(typeof(RectTransform))]
public class UiFilter : MonoBehaviour, ICanvasRaycastFilter, IPointerClickHandler, IPointerDownHandler, IPointerUpHandler
{
public bool NatureDestory = false;
public bool Osmosis = true;
public bool Strong = false;
public bool isTransOsmosis = true;//是转发型渗透
private bool _onceEnter = true;
private Camera _uiCamera;
private RectTransform tarRect;
public event Action ClickEvent;
public event Action InterruptEvent;
public bool IsRaycastLocationValid(Vector2 sp, Camera eventCamera)
{
//是否强制引导指定位置
if (isTransOsmosis)
{
return true;
}
if (_uiCamera == null)
{
return true;
}
if (tarRect == null)
{
return true;
}
bool isContain = RectTransformUtility.RectangleContainsScreenPoint(tarRect, sp, _uiCamera);
if (isContain)
{
if (Input.GetMouseButtonDown(0) && _onceEnter)
{
_onceEnter = false;
NatureDestory = true;
//按下事件，销毁遮罩自身，需要避免多次销毁
GameObject.Destroy(this.gameObject, 0.1f);
}
return false;//渗透
}
return true;//不渗透
}
private void OnDestroy()
{
if (ClickEvent != null)
{
ClickEvent();
}
if (!NatureDestory)
{
//非点击自然销毁，调用中断
Debug.Log("非自然中断");
InterruptEvent();
}
}
// Start is called before the first frame update
private void Start()
{
tarRect = this.GetComponent<RectTransform>();
this.GetComponent<ParticleSystem>().Play();
var cameras = GameObject.FindObjectsOfType<Camera>();
_uiCamera = cameras.Where(p => p.name == "UICamera").First();
//是否强制引导
if (isTransOsmosis)
{
var button= this.GetComponent<Button>();
button.onClick.AddListener(ButtonClick);
}
}
private void ButtonClick()
{
if (_onceEnter)
{
_onceEnter = false;
NatureDestory = true;
//按下事件，销毁遮罩自身，需要避免多次销毁
GameObject.Destroy(this.gameObject, 0.1f);
}
}
//点击渗透
public void OnPointerClick(PointerEventData eventData)
{
if (Osmosis)
{
PassEvent(eventData, ExecuteEvents.pointerClickHandler);
}
}
//按下渗透
public void OnPointerDown(PointerEventData eventData)
{
if (Osmosis)
{
PassEvent(eventData, ExecuteEvents.pointerDownHandler);
}
}
//抬起渗透
public void OnPointerUp(PointerEventData eventData)
{
if (Osmosis)
{
PassEvent(eventData, ExecuteEvents.pointerUpHandler);
}
}
public void PassEvent<T>(PointerEventData data, ExecuteEvents.EventFunction<T> function)
where T : IEventSystemHandler
{
var parent = transform.parent.gameObject;
List<RaycastResult> results = new List<RaycastResult>();
EventSystem.current.RaycastAll(data, results);
GameObject current = data.pointerCurrentRaycast.gameObject;
for (int i = 0; i < results.Count && i < 5; i++)//渗透不能太多，防卡死
{
if (current != results[i].gameObject && parent != results[i].gameObject)
{
ExecuteEvents.Execute(results[i].gameObject, data, function);
//RaycastAll后ugui会自己排序，如果你只想响应透下去的最近的一个响应，这里ExecuteEvents.Execute后直接break就行。
break;
}
}
ExecuteEvents.Execute(parent, data, function);
}
}
4.UnityUI comes with penetration
Uncheck Raycast Target
