Unity 多点触控无法达到其方法

如何解决Unity 多点触控无法达到其方法

我遵循了 this 教程，基本上我所做的一切都是一样的。但是我无法访问 testTouch 类中的方法。这是 TouchInput 类：

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

public class touchInput : MonoBehavIoUr
{
    public LayerMask touchInputMask;
    private List<GameObject> touchList = new List<GameObject>();
    private GameObject[] touchesOld;
    private RaycastHit hit;
    // Start is called before the first frame update
    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {

#if UNITY_EDITOR

//统一编辑器的相同内容如教程中所示 #endif

        if (Input.touchCount > 0)
        {
            touchesOld = new GameObject[touchList.Count];
            touchList.copyTo(touchesOld);
            touchList.Clear();
            foreach (Touch touch in Input.touches)
            {
                Ray ray = GetComponent<Camera>().ScreenPointToRay(touch.position);


                if (Physics.Raycast(ray,out hit,touchInputMask))
                {
                    GameObject recepient = hit.transform.gameObject;
                    touchList.Add(recepient);

                    if (touch.phase == TouchPhase.Began)
                    {
                        recepient.SendMessage("OnTouchDown",hit.point,SendMessageOptions.DontRequireReceiver);
                    }

                    if (touch.phase == TouchPhase.Ended)
                    {
                        recepient.SendMessage("OnTouchUp",SendMessageOptions.DontRequireReceiver);
                    }

                    if (touch.phase == TouchPhase.Stationary)
                    {
                        recepient.SendMessage("OnTouchStay",SendMessageOptions.DontRequireReceiver);
                    }

                    if (touch.phase == TouchPhase.Canceled)
                    {
                        recepient.SendMessage("OnTouchExit",SendMessageOptions.DontRequireReceiver);
                    }
                }
            }
            foreach (GameObject g in touchesOld)
            {
                if (!touchList.Contains(g))
                    g.SendMessage("OnTouchExit",SendMessageOptions.DontRequireReceiver);
            }
        }
    }
}

这里是 testTouch 类：

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

public class testTouch : MonoBehavIoUr
{

    public Color defaultColor;  //set manually in the editor
    public Color selectedColor;  //set manually in the editor
    public Material mat;  

    void Start()
    {
        mat = this.GetComponent<SpriteRenderer>().material;
     // mat.color = selectedColor;
    }

    void OnTouchDown()
    {
        mat.color = selectedColor;
        Debug.Log("hello");
    }

    void OnTouchUp()
    {
        mat.color = defaultColor;
        Debug.Log("hello");
    }

    void OnTouchStay()
    {
        mat.color = selectedColor;
        Debug.Log("hello");
    }

    void OnTouchExit()
    {
        mat.color = defaultColor;
        Debug.Log("hello");
    }

我没有收到任何错误，也无法访问那些 Debug.Logs。当我点击 2Dcircle 时没有任何反应。

我尝试了编辑器和我的安卓手机。它们都不起作用。

解决方法

2D 对撞机上的 3D 光线投射 (Physics.Raycast()) 不起作用。

用 3D 圆形碰撞器替换 2D 圆形碰撞器。

没有将 Raycast 作为第三个参数的 layerMask 方法的重载。

https://docs.unity3d.com/ScriptReference/Physics.Raycast.html

您错误地调用了 Raycast 方法的另一个重载。

public static bool Raycast(Ray ray,out RaycastHit hitInfo,float maxDistance = Mathf.Infinity,int layerMask = DefaultRaycastLayers,QueryTriggerInteraction queryTriggerInteraction = QueryTriggerInteraction.UseGlobal);