複数Buttonの同時発動を禁止するやつ

ButtonAdapter.cs

using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

public class ButtonAdapter : MonoBehaviour
{

    public Button[] Buttons;
    
    private GameObject firstSelected = null;
    
    private void Awake()
    {
        foreach (var b in this.Buttons) {
            var trigger = b.gameObject.AddComponent<EventTrigger>();
            
            // IPointerDownHandler
            EventTrigger.Entry entryDown = new EventTrigger.Entry();
            entryDown.eventID = EventTriggerType.PointerDown;
            entryDown.callback.AddListener( (eventData) => { OnTouchDown(eventData as PointerEventData); } );
            trigger.triggers.Add(entryDown);
        }
    }
    
    public void OnTouchDown(PointerEventData eventData)
    {
        if (this.firstSelected == null) {
            this.firstSelected = eventData.selectedObject;
            // 他を無効化
            foreach (var other in this.Buttons) {
                if (other.gameObject.Equals(eventData.selectedObject)) {
                    continue;
                }
                other.interactable = false;
            }
        }
    }
    
    public void Reset()
    {
        foreach (var other in this.Buttons) {
            other.interactable = true;
        }
        this.firstSelected = null;
    }

}