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标题: UGUI不规则热区的处理 [打印本页]

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作者: 烟雨    时间: 2015-11-30 23:45
标题: UGUI不规则热区的处理

利用系统现有组件，简单处理了下:

1. 自定义了一个CustomRaycaster类，派生自GraphicRaycaster

1. using UnityEngine;
   
2. using System.Collections;
   
3. using UnityEngine.UI;
   
4. using System.Collections.Generic;
   
5. using UnityEngine.EventSystems;
   
6. 
   
7. public class CustomRaycaster : GraphicRaycaster
   
8. {
   
9.     private List<RaycastResult> _toBeRemoved = new List<RaycastResult>();
   
10. 
    
11.     public override void Raycast(PointerEventData eventData, List<RaycastResult> resultAppendList)
    
12.     {
    
13.         base.Raycast(eventData, resultAppendList);
    
14. 
    
15.         _toBeRemoved.Clear();
    
16.         foreach (var result in resultAppendList)
    
17.         {
    
18.             var polygon2D = result.gameObject.GetComponent<PolygonCollider2D>();
    
19.             if (!polygon2D)
    
20.                 continue;
    
21.             
    
22.             if (!polygon2D.OverlapPoint(eventData.position))
    
23.                 _toBeRemoved.Add(result);
    
24.         }
    
25. 
    
26.         if (_toBeRemoved.Count > 0)
    
27.             resultAppendList.RemoveAll(r => _toBeRemoved.Contains(r));
    
28.     }
    
29. }

复制代码

2. 删除Canvas上原有的GraphicRaycaster，用这个替换
3. 在不规则UI对象上添加一个PolygonCollider2D组件，编辑节点，覆盖热点区域

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