Feat:增加多点触控和单点触控示例

Demo/API_V2/Assets/API/Chumo/ChumoSO.asset

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Demo/API_V2/Assets/API/Chumo/TouchTest.cs

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+using UnityEngine;
+using UnityEngine.UI;
+using UnityEngine.EventSystems;
+using System.Collections.Generic;
+
+public class TouchTest : MonoBehaviour, 
+    IPointerDownHandler, 
+    IDragHandler, 
+    IPointerUpHandler,
+    IBeginDragHandler,
+    IEndDragHandler
+{
+    [SerializeField] private Canvas canvas; // 通过Inspector面板拖拽赋值
+    private Dictionary<int, List<GameObject>> touchCircles = new Dictionary<int, List<GameObject>>();
+    // 移除currentPointerId字段，改为完全依赖touchCircles字典管理所有触点
+
+    void Start()
+    {
+        Debug.Log("TouchTest脚本初始化开始");
+
+        // 确保Canvas设置正确
+        if (canvas == null)
+        {
+            Debug.Log("未指定Canvas，尝试自动查找...");
+            canvas = FindObjectOfType<Canvas>();
+            if (canvas == null)
+            {
+                Debug.LogError("未找到Canvas，请在场景中创建Canvas并拖拽赋值");
+                enabled = false;
+                return;
+            }
+            Debug.Log($"已自动找到Canvas: {canvas.name}");
+        }
+
+        // 确保Canvas有GraphicRaycaster组件
+        if (!canvas.TryGetComponent<GraphicRaycaster>(out var raycaster))
+        {
+            Debug.Log("Canvas缺少GraphicRaycaster，正在添加...");
+            raycaster = canvas.gameObject.AddComponent<GraphicRaycaster>();
+            Debug.Log($"已添加GraphicRaycaster: {raycaster != null}");
+        }
+
+        // 确保EventSystem设置正确
+        EventSystem eventSystem = FindObjectOfType<EventSystem>();
+        if (eventSystem == null)
+        {
+            Debug.Log("未找到EventSystem，正在创建...");
+            eventSystem = new GameObject("EventSystem").AddComponent<EventSystem>();
+            var inputModule = eventSystem.gameObject.AddComponent<StandaloneInputModule>();
+            Debug.Log($"已创建EventSystem和StandaloneInputModule: {inputModule != null}");
+        }
+        else if (eventSystem.GetComponent<StandaloneInputModule>() == null)
+        {
+            Debug.Log("EventSystem缺少StandaloneInputModule，正在添加...");
+            var inputModule = eventSystem.gameObject.AddComponent<StandaloneInputModule>();
+            Debug.Log($"已添加StandaloneInputModule: {inputModule != null}");
+        }
+
+        // 确保脚本挂载在可接收事件的UI对象上
+        if (!TryGetComponent<Graphic>(out var graphic))
+        {
+            Debug.Log("当前对象缺少Graphic组件，正在添加透明Image...");
+            var image = gameObject.AddComponent<Image>();
+            // image.color = new Color(0, 0, 0, 0.01f);
+            image.raycastTarget = true; // 确保能接收事件
+            Debug.Log($"已添加Image组件，raycastTarget: {image.raycastTarget}");
+        }
+        else
+        {
+            graphic.raycastTarget = true; // 确保现有Graphic能接收事件
+            Debug.Log($"已确保Graphic组件raycastTarget为true: {graphic.raycastTarget}");
+        }
+
+        // 确保RectTransform覆盖整个屏幕
+        var rectTransform = GetComponent<RectTransform>();
+        if (rectTransform != null)
+        {
+            rectTransform.anchorMin = Vector2.zero;
+            rectTransform.anchorMax = Vector2.one;
+            rectTransform.sizeDelta = Vector2.zero;
+            Debug.Log("已设置RectTransform为全屏覆盖");
+        }
+
+        Debug.Log("TouchTest脚本初始化完成");
+    }
+
+    public void OnPointerDown(PointerEventData eventData)
+    {
+        Debug.Log($"OnPointerDown - 指针ID: {eventData.pointerId}, 位置: {eventData.position}, 按下按钮: {eventData.button}");
+        HandlePointerEvent(eventData, 1.0f); // 初始点使用完整大小
+    }
+
+    public void OnBeginDrag(PointerEventData eventData)
+    {
+        // 拖动开始时创建新圆点
+        HandlePointerEvent(eventData, 0.5f); // 拖动点使用半大小
+    }
+
+    public void OnDrag(PointerEventData eventData)
+    {
+        // 拖动过程中持续创建新圆点
+        HandlePointerEvent(eventData, 0.5f);
+    }
+
+    public void OnPointerUp(PointerEventData eventData)
+    {
+        // 指针抬起时清除对应圆点
+        HandlePointerEnd(eventData);
+    }
+
+    public void OnEndDrag(PointerEventData eventData)
+    {
+        // 拖动结束时清除对应圆点
+        HandlePointerEnd(eventData);
+    }
+
+    void HandlePointerEvent(PointerEventData eventData, float scale)
+    {
+        Vector2 localPoint;
+        RectTransformUtility.ScreenPointToLocalPointInRectangle(
+            canvas.transform as RectTransform, 
+            eventData.position, 
+            canvas.worldCamera, 
+            out localPoint);
+
+        // 如果是新触点，创建新颜色圆点
+        if (!touchCircles.ContainsKey(eventData.pointerId))
+        {
+            touchCircles[eventData.pointerId] = new List<GameObject>();
+            GameObject newCircle = CreateCircle(localPoint, GetRandomColor(), 1.0f);
+            touchCircles[eventData.pointerId].Add(newCircle);
+        }
+        else
+        {
+            // 已有触点则使用相同颜色创建新圆点
+            Color circleColor = touchCircles[eventData.pointerId][0].GetComponent<Image>().color;
+            GameObject newCircle = CreateCircle(localPoint, circleColor, scale);
+            touchCircles[eventData.pointerId].Add(newCircle);
+        }
+    }
+
+    void HandlePointerEnd(PointerEventData eventData)
+    {
+        if (touchCircles.ContainsKey(eventData.pointerId))
+        {
+            foreach (GameObject circle in touchCircles[eventData.pointerId])
+            {
+                Destroy(circle);
+            }
+            touchCircles.Remove(eventData.pointerId);
+        }
+    }
+
+    GameObject CreateCircle(Vector2 position, Color color, float scale)
+    {
+        GameObject circle = new GameObject("Circle");
+        circle.transform.SetParent(canvas.transform, false);
+
+        Image image = circle.AddComponent<Image>();
+        image.color = color;
+
+        RectTransform rectTransform = circle.GetComponent<RectTransform>();
+        rectTransform.sizeDelta = new Vector2(100, 100) * scale;
+        rectTransform.anchoredPosition = position;
+
+        return circle;
+    }
+
+    // 使用静态种子确保跨平台一致性
+    private System.Random _random = new System.Random();
+
+    Color GetRandomColor()
+    {
+        // 使用System.Random替代Unity的Random.value
+        float h = (float)_random.NextDouble();
+        float s = 0.7f + (float)_random.NextDouble() * 0.3f; // 饱和度0.7-1.0
+        float v = 0.8f + (float)_random.NextDouble() * 0.2f; // 明度0.8-1.0
+
+        Color color = Color.HSVToRGB(h, s, v);
+        color.a = 0.8f;
+
+        // WebGL下强制刷新颜色
+        #if UNITY_WEBGL
+        color = new Color(color.r, color.g, color.b, color.a);
+        #endif
+
+        return color;
+    }
+}