Unityの自作タイマー

timer.cs

using UnityEngine;
using System;
using System.Collections;

/// <summary>
/// 全てのTimerクラスをupdateさせる
/// </summary>
public class TimerExecutor : MonoBehaviour {
    public event Action timeUpdate;
    
    void Update()
    {
        if(timeUpdate != null)timeUpdate();
    }
}

public class Timer
{
    public float nowTime { get; private set; }

    public float waitingTime { get; private set; }

    public bool isLoop {get; private set; }
    public bool isFinished { get { return nowTime > waitingTime; } }
    private Action notify;
    
    public Timer (float time, Action callBack)
    {
        nowTime = 0;
        waitingTime = time;
        notify = callBack;
    }
    
    /// <summary>
    /// メソッドを呼ぶ必要が無い場合こちらをつかう
    /// </summary>
    /// <param name="time">Time.</param>
    public Timer(float time)
    {
        nowTime = 0;
        waitingTime = time;
        notify = null;
    }

    public void Start(bool loop)
    {
        isLoop = loop;
        Singleton<TimerExecutor>.Instance.timeUpdate += Update;
    }
    private void Update ()
    {
        nowTime += Time.deltaTime;
        if (nowTime > waitingTime) {
            if(notify != null)notify ();
            if(isLoop) { nowTime = 0;}
            else { Singleton<TimerExecutor>.Instance.timeUpdate -= Update; }
        }
    }
    
    /// <summary>
    /// 時間経過をリセットする
    /// </summary>
    public void Reset()
    {
        nowTime = Time.deltaTime;
        nowTime = 0;
    }
    
    /// <summary>
    /// 新たにタイマーをセットした上でリセット
    /// </summary>
    /// <param name="time">Time.</param>
    public void Reset(float time)
    {
        waitingTime = time;
        Reset();
    }
}