untiy 倒计时

实现例如 01:30:50的倒计时

  /// <summary>
    /// 倒计时文本框
    /// </summary>
    private Text countDownText;
    /// <summary>
    /// 剩余的秒数
    /// </summary>
    private int secondsRemainng = 0;


    private void OnDestroy()
    {
    
        //停止协程
        StopAllCoroutines();
    }

    /// <summary>
    /// 设置倒计时
    /// </summary>
    public void SetCountDown(int totalTime)
    {
    
        if (countDownText == null)
        {
    
            countDownText = transform.Find("TopPanel/CountDownText").GetComponent<Text>();
        }
        secondsRemainng = totalTime;
        StartCoroutine(SetCountDownIE());
    }
    /// <summary>
    /// 设置倒计时的协程
    /// </summary>
    private IEnumerator SetCountDownIE()
    {
    
        while (secondsRemainng > 0)
        {
    
            yield return new WaitForSeconds(1f);
            secondsRemainng--;
            //计算剩余时间
            int hour, minute, second;
            hour = secondsRemainng / 3600;
            minute = (secondsRemainng % 3600)/60;
            second = (secondsRemainng % 3600 % 60);
            countDownText.text = hour.ToString("d2") + ":" + minute.ToString("d2") + ":" + second.ToString("d2");
        }
        //倒计时结束，结束考试
        ExamControllerBase.Instance.FinishExam();
    }

使用时调用方法SetCountDown();
例如

SetCountDown(3670);