【Unity】スクロールビューの実装とあれこれ【uGUI】

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;

/// <summary>
/// TestScrollScene管理クラス
/// </summary>
public class TestScrollSceneManager : MonoBehaviour
{
    [SerializeField]
    private List<GameObject> riceBallList;
    
    /// <summary>
    /// 開始処理
    /// </summary>
    void Start()
    {
        int startCount = 0;
        foreach (GameObject riceBall in riceBallList)
        {
            int riceCount = ++startCount;
            
            // イベントトリガーでの追加
            EventTrigger trigger = riceBall.AddComponent<EventTrigger>();
            EventTrigger.Entry entry = new EventTrigger.Entry();
            entry.eventID = EventTriggerType.PointerClick;
            entry.callback.AddListener((data) => { PushRiceBall(riceCount);});
            trigger.triggers.Add(entry);
        }
        
    }

    /// <summary>
    /// おにぎりを押した時
    /// </summary>
    public void PushRiceBall(int count)
    {
        Debug.LogFormat("おにぎり{0}「痛いッス」", count);
    }
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;

/// <summary>
/// TestScrollScene管理クラス
/// </summary>
public class TestScrollSceneManager : MonoBehaviour
{
    [SerializeField]
    private List<GameObject> riceBallList;

    /// <summary>
    /// おにぎりクリックリスナー
    /// </summary>
    private class RiceBallClickListener : MonoBehaviour, IPointerClickHandler
    {
        public int riceCount { get; set; }

        public void OnPointerClick(PointerEventData eventdata)
        {
            Debug.LogFormat("おにぎり{0}「痛いッス」", riceCount);
        }
    }
    
    /// <summary>
    /// 開始処理
    /// </summary>
    void Start()
    {
        int startCount = 0;
        foreach (GameObject riceBall in riceBallList)
        {
            int riceCount = ++startCount;

            // ClickListenerクラスの追加
            RiceBallClickListener listener = riceBall.AddComponent<RiceBallClickListener>();
            listener.riceCount = riceCount;
        }
        
    }
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;

/// <summary>
/// TestScrollScene管理クラス
/// </summary>
public class TestScrollSceneManager : MonoBehaviour
{
    [SerializeField]
    private List<GameObject> riceBallList;
    
    /// <summary>
    /// 開始処理
    /// </summary>
    void Start()
    {
        int startCount = 0;
        foreach (GameObject riceBall in riceBallList)
        {
            int riceCount = ++startCount;
            
            // onClickでの追加
            riceBall.AddComponent<Button>();
            riceBall.GetComponent<Button>().onClick.AddListener(() => { PushRiceBall(riceCount); });
        }
        
    }

    /// <summary>
    /// おにぎりを押した時
    /// </summary>
    public void PushRiceBall(int count)
    {
        Debug.LogFormat("おにぎり{0}「痛いッス」", count);
    }
}