Unity中的UI事件

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
 
/// <summary>
/// 不规则区域Button
/// </summary>
[RequireComponent(typeof(RectTransform))
[RequireComponent(typeof(Image))]
public class IrregulaButton : MonoBehaviour{
    [Tooltip("设定Sprite响应的Alpha阈值")]
    [Range(0, 0.5f)]
    public float alpahThreshold = 0.5f;
    private void Awake(){
        var image = this.GetComponent<Image>();
        if (null != image){
            image.alphaHitTestMinimumThreshold = alpahThreshold;
        }
    }
}