UIButtonHighlighter.cs

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using System;
using UnityEngine;
 
public class UIButtonHighlighter : MonoBehaviour
{
    public Func<bool> killCondition;
 
    public UIButton button;
 
    public Sprite sprite;
 
    public void Set(Func<bool> _killCondition)
    {
        killCondition = _killCondition;
        button = GetComponent<UIButton>();
        sprite = button.image.sprite;
        button.image.sprite = button.spriteState.highlightedSprite;
    }
 
    private void Update()
    {
        if (killCondition())
        {
            button.image.sprite = sprite;
            UnityEngine.Object.Destroy(this);
        }
    }
}