Unity 销毁点击非当前UI---- EventSystem.current.RaycastAll()

在制作UI时经常会遇到，点击别处时当前UI消失，每次要写一边很麻烦。

于是，自己写了一个单例来实现关于单个或多个面板点击别处消失问题。

代码如下：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;

public class RaycastUIHelper
{
    private static RaycastUIHelper mInstance = null;
    private static object mLock = new object();
    public static RaycastUIHelper Instance
    {
        get
        {
            lock (mLock)
            {
                if (mInstance == null)
                {
                    mInstance = new RaycastUIHelper();
                }
            }
            return mInstance;
        }
    }
    /// 

    /// 鼠标可选状态
    /// 
    public enum MouseStatus
    {
        Down=0,//左右键按下去
        Up=1,//左右键抬起
        DownAndWheel =2,//左右键按下去+滑轮
        UpAndWheel=3,//左右键抬起+滑轮
    }
    /// 

    ///  返回单个个UI检查值
    /// 
    /// 
    /// 
    /// 
    public bool CheckRaycastUI(Transform uiPanel, MouseStatus mouseStatus= MouseStatus.DownAndWheel)
    {
        switch (mouseStatus)
        {
            case MouseStatus.DownAndWheel:
                if (Input.GetMouseButtonDown(0) || Input.GetMouseButtonDown(1) || Input.GetAxis("Mouse ScrollWheel") != 0)
                {
                   return GetCheckValue(uiPanel);
                }
                return false;
            case MouseStatus.Down:
                if (Input.GetMouseButtonDown(0) || Input.GetMouseButtonDown(1))
                {
                    return GetCheckValue(uiPanel);
                }
                return false;
            case MouseStatus.Up:
                if (Input.GetMouseButtonUp(0) || Input.GetMouseButtonUp(1))
                {
                    return GetCheckValue(uiPanel);
                }
                return false;
            case MouseStatus.UpAndWheel:
                if (Input.GetMouseButtonUp(0) || Input.GetMouseButtonUp(1) || Input.GetAxis("Mouse ScrollWheel") != 0)
                {
                    return GetCheckValue(uiPanel);
                }
                return false;


        }
        return false;
    }

    /// 

    /// 返回多个UI检查值
    /// 
    /// 
    /// 
    /// 
    public bool CheckRaycastUI(List uiPanels, MouseStatus mouseStatus = MouseStatus.DownAndWheel)
    {
        switch (mouseStatus)
        {
            case MouseStatus.DownAndWheel:
                if (Input.GetMouseButtonDown(0) || Input.GetMouseButtonDown(1) || Input.GetAxis("Mouse ScrollWheel") != 0)
                {
                    return GetCheckValue(uiPanels);
                }
                return false;
            case MouseStatus.Down:
                if (Input.GetMouseButtonDown(0) || Input.GetMouseButtonDown(1))
                {
                    return GetCheckValue(uiPanels);
                }
                return false;
            case MouseStatus.Up:
                if (Input.GetMouseButtonUp(0) || Input.GetMouseButtonUp(1))
                {
                    return GetCheckValue(uiPanels);
                }
                return false;
            case MouseStatus.UpAndWheel:
                if (Input.GetMouseButtonUp(0) || Input.GetMouseButtonUp(1) || Input.GetAxis("Mouse ScrollWheel") != 0)
                {
                    return GetCheckValue(uiPanels);
                }
                return false;
        }
        return false;
    }
    /// 

    /// 返回多个UI检查值
    /// 
    /// 
    /// 
    /// 
    public bool CheckRaycastUI(Transform uiPanels1, Transform uiPanels2, MouseStatus mouseStatus = MouseStatus.DownAndWheel)
    {
        List uiPanels = new List(2) {
            uiPanels1,
            uiPanels2,
        };
        switch (mouseStatus)
        {
            case MouseStatus.DownAndWheel:
                if (Input.GetMouseButtonDown(0) || Input.GetMouseButtonDown(1) || Input.GetAxis("Mouse ScrollWheel") != 0)
                {
                    return GetCheckValue(uiPanels);
                }
                return false;
            case MouseStatus.Down:
                if (Input.GetMouseButtonDown(0) || Input.GetMouseButtonDown(1))
                {
                    return GetCheckValue(uiPanels);
                }
                return false;
            case MouseStatus.Up:
                if (Input.GetMouseButtonUp(0) || Input.GetMouseButtonUp(1))
                {
                    return GetCheckValue(uiPanels);
                }
                return false;
            case MouseStatus.UpAndWheel:
                if (Input.GetMouseButtonUp(0) || Input.GetMouseButtonUp(1) || Input.GetAxis("Mouse ScrollWheel") != 0)
                {
                    return GetCheckValue(uiPanels);
                }
                return false;
        }
        return false;
    }
    /// 

    /// 检查鼠标是否在UI上
    /// 
    /// 
    /// 
    public bool CheckMouseOnUI()
    {
        if (EventSystem.current.IsPointerOverGameObject())
        {
            PointerEventData pointerEventData = new PointerEventData(EventSystem.current);
            pointerEventData.position = Input.mousePosition;
            List result = new List();
            EventSystem.current.RaycastAll(pointerEventData, result);
            if (result.Count > 0)
            {
                return true;
            }
            return false;
        }
        return false;
    }
    /// 

    /// 单个 检查值
    /// 
    /// 
    /// 
    private bool GetCheckValue(Transform uiPanel)
       {
        if (EventSystem.current.IsPointerOverGameObject())
        {
            PointerEventData pointerEventData = new PointerEventData(EventSystem.current);
            pointerEventData.position = Input.mousePosition;
            List result = new List();
            EventSystem.current.RaycastAll(pointerEventData, result);
            if (result.Count > 0)
                foreach (var item in result)
                {
                    if (uiPanel != null)
                        if (item.gameObject.transform.IsChildOf(uiPanel.transform))
                        {
                            return false;
                        }
                }
        }
        return true;
    }
    /// 

    /// 多个个 检查值
    /// 
    /// 
    /// 
    public bool GetCheckValue(List uiPanels)
    {
        if (EventSystem.current.IsPointerOverGameObject())
        {
            PointerEventData pointerEventData = new PointerEventData(EventSystem.current);
            pointerEventData.position = Input.mousePosition;
            List result = new List();
            EventSystem.current.RaycastAll(pointerEventData, result);
            if (result.Count > 0)
                foreach (var item in result)
                {
                    if (uiPanels != null)
                        foreach (var u in uiPanels)
                        {
                            if (item.gameObject.transform.IsChildOf(u.transform))
                            {
                                return false;
                            }
                        }
                }
        }
        return true;
    }
}

这个拿上去就可以用了，