WaiXie_QuestionSystem/Assets/Script/UI/Item/CountDownItem.cs

using System;
using System.Collections.Concurrent;
using System.Threading;
using UnityEngine;
using UnityEngine.UI;
using ZGameFramework;

namespace Script.UI
{
    public class CountDownItem : MonoBehaviour
    {
        public Text text;
        public Text title;
        public int minute;

        private Timer _timer;
        private bool isCountDown;
        private ConcurrentQueue<Action> _queue = new ConcurrentQueue<Action>();
        private double _time;


        private void OnEnable()
        {
            title.text = FileManager.Instance.GetTitle.title;
            _time = 0;
            StartCountDown(minute);
        }

        private void StartCountDown(double time)
        {
            isCountDown = true;
            _timer = new Timer(Callback, null, TimeSpan.FromSeconds(time), Timeout.InfiniteTimeSpan);
        }

        private void Callback(object o)
        {
            isCountDown = false;
            _queue.Enqueue(() =>
            {
                OnEnd();
                text.text = "00:00:00";
            });
        }

        public void Pause()
        {
            isCountDown = false;
            _timer.Dispose();
        }

        public void Resume()
        {
            StartCountDown(minute - _time);
        }

        private void OnEnd()
        {
            Debug.Log("倒计时结束");
            var fromSeconds = TimeSpan.FromSeconds(_time);
            var time = fromSeconds.ToCustomString();
            GlobalManager.Instance.SetTime(time);
            var panelBase = UIManager.Instance.GetPanel(PanelType.Answering);
            var answeringPanel = panelBase as AnsweringPanel;
            answeringPanel.SaveData();

            UIManager.Instance.OpenPanel(PanelType.Summary);
        }

        private void Update()
        {
            while (_queue.TryDequeue(out var action))
            {
                action?.Invoke();
            }

            if (isCountDown)
            {
                _time += Time.deltaTime;
                //剩余的时间
                var remainTime = TimeSpan.FromSeconds(minute) - TimeSpan.FromSeconds(_time);
                text.text = remainTime.ToCustomString();
            }
        }

        private void OnDisable()
        {
            _timer.Dispose();
        }

        public void StopCountDown()
        {
            _timer.Dispose();
            isCountDown = false;
            var fromSeconds = TimeSpan.FromSeconds(_time);
            var time = fromSeconds.ToCustomString();
            GlobalManager.Instance.SetTime(time);
        }
    }
}

public static class TimeSpanUtil
{
    public static string ToCustomString(this TimeSpan timeSpan)
    {
        return timeSpan.ToString(@"hh\:mm\:ss");
    }
}