Unity（三十四）：不规则区域点击事件

效果

脚本

游戏对象组件 Image PolygonCollider2D

• 方式一：

  using UnityEngine;
  using UnityEngine.EventSystems;
  using UnityEngine.UI;
  
  [RequireComponent(typeof(PolygonCollider2D))]
  public class PolygonColliderPointerHandler : Image, IPointerClickHandler
  {
        
        
      private PolygonCollider2D _polygon;
  
      private PolygonCollider2D Polygon
      {
        
        
          get
          {
        
        
              if (_polygon == null) _polygon = GetComponent<PolygonCollider2D>();
              return _polygon;
          }
      }
  
      // 判断是否在区域内
      public override bool IsRaycastLocationValid(Vector2 screenPoint, Camera eventCamera)
      {
        
        
          RectTransformUtility.ScreenPointToWorldPointInRectangle(rectTransform, screenPoint, eventCamera,
              out Vector3 point);
          return Polygon.OverlapPoint(point); // 判断点击位置是否在区域内
      }
  
      public void OnPointerClick(PointerEventData eventData)
      {
        
        
          Debug.Log("不规则区域点击事件～～～");
      }
  }
  

• 方式二：

  using UnityEngine;
  using UnityEngine.EventSystems;
  
  [RequireComponent(typeof(PolygonCollider2D))]
  public class PolygonColliderPointerHandler : MonoBehaviour, IPointerClickHandler
  {
        
        
      private PolygonCollider2D _polygon;
  
      private void Awake()
      {
        
        
          _polygon = GetComponent<PolygonCollider2D>();
      }
  
      public void OnPointerClick(PointerEventData eventData)
      {
        
        
          if (_polygon.OverlapPoint(eventData.position))
          {
        
        
              Debug.Log("不规则区域点击事件～～～");
          }
      }
  }