Unity时间倒计时小功能——协程

StopCoroutine(countdownCoroutine);协程的停止只能停止当前，协程在下一次开始时会重新启动。所以要想真正停止需要采用变量bool值进行判断

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

public class StarContTest : MonoBehaviour
{
    
    
    public Button StopBtn;
    public Button StartBtn;
    public int currentTime;
    public Text countdownText;
    public Slider progressBar;
    public float TotalTime {
    
     get; set; }
    public float CurrentTime {
    
     get; set; }
    private bool isCountdownRunning = true;
    private Coroutine countdownCoroutine;

    // Start is called before the first frame update
    void Start()
    {
    
    
        TotalTime = 10f;
        CurrentTime = TotalTime;
        countdownCoroutine = StartCoroutine(StartCountdown());
        StopBtn.onClick.AddListener(StopCountdownButtonClicked);
        StartBtn.onClick.AddListener(StartCountdownButtonClicked);
    }

    private void StopCountdownButtonClicked()
    {
    
    
        if (countdownCoroutine != null)
        {
    
    
            StopCoroutine(countdownCoroutine);
            countdownCoroutine = null;
            isCountdownRunning = false;
        }
    }

    private void StartCountdownButtonClicked()
    {
    
    
        if (!isCountdownRunning)
        {
    
    
            CurrentTime = TotalTime;
            countdownCoroutine = StartCoroutine(StartCountdown());
            isCountdownRunning = true;
        }
    }

    private void UpdateProgressBar()
    {
    
    
        progressBar.maxValue = TotalTime;
        progressBar.value = CurrentTime;
    }

    public void UpdateCountdownText()
    {
    
    
        countdownText.text = CurrentTime.ToString("F0") + "s";
    }

    public void DecreaseTime()
    {
    
    
        CurrentTime--;
    }

    private IEnumerator StartCountdown()
    {
    
    
        while (CurrentTime > 0f)
        {
    
    
            yield return new WaitForSeconds(1f);
            DecreaseTime();
            UpdateCountdownText();
            UpdateProgressBar();
        }

        if (!isCountdownRunning)
        {
    
    
            // 执行停止操作
            // 可以在这里添加你需要的代码
        }
        else
        {
    
    
            // 倒计时结束后的操作
            countdownText.text = "0";
            // 可以在这里添加你需要的代码
        }
    }

    // Update is called once per frame
    void Update()
    {
    
    

    }
}