uGUIのボタン長押し判定

UGuiLongPress.cs

using UnityEngine;
using UnityEngine.Events;
using UnityEngine.EventSystems;

public class UGuiLongPress : MonoBehaviour, IPointerDownHandler, IPointerUpHandler
{
    /// <summary>
    /// 押しっぱなし時に呼び出すイベント
    /// </summary>
    public UnityEvent onLongPress = new UnityEvent ();
    /// <summary>
    /// 押しっぱなし判定の間隔（この間隔毎にイベントが呼ばれる）
    /// </summary>
    public float intervalAction = 0.2f;
    // 押下開始時にもイベントを呼び出すフラグ
    public bool callEventFirstPress;

    // 次の押下判定時間
    float nextTime = 0f;

    /// <summary>
    /// 押下状態
    /// </summary>
    public bool pressed
    {
        get;
        private set;
    }

    void Update ()
    {
        if (pressed && nextTime < Time.realtimeSinceStartup) {
            onLongPress.Invoke ();
            nextTime = Time.realtimeSinceStartup + intervalAction;
        }
    }

    public void OnPointerDown (PointerEventData eventData)
    {
        pressed = true;
        if (callEventFirstPress) {
            onLongPress.Invoke ();
        }
        nextTime = Time.realtimeSinceStartup + intervalAction;
    }

    public void OnPointerUp (PointerEventData eventData)
    {
        pressed = false;
    }
}