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～～～");
        }
    }
}