unity倒计时器的制作

1.打开unity，新建一个场景，创建一个GameObject----UI----panel.并创建两个按钮作为panel的子物体。

2.开始编写脚本。

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class Daojishi : MonoBehaviour {

    private float totaltime1 = 360;//倒计时总时间
    private float totaltime2 =360;
    private float intervaletime = 1;
    public Text countdown1text;//倒计时
    public Text countdown2text;

	// Use this for initialization
	void Start () {

        countdown1text.text = string.Format("{0:D2}:{1:D2}",
            (int)totaltime1 / 60, (int)totaltime1 % 60);
        countdown2text.text = string.Format("{0:D2}:{1:D2}",
           (int)totaltime2 / 60, (int)totaltime1 % 60);
       StartCoroutine(Count_down());
    }
    private IEnumerator Count_down() {//协程方法实现倒计时
        while (totaltime1 > 0)
        {

            yield return new WaitForSeconds(1.0f);
            totaltime1--;
            countdown1text.text = string.Format("{0:D2}:{1:D2}",
          (int)totaltime1 / 60, (int)totaltime1 % 60);
        }
    }
	// Update is called once per frame
	void Update () {//更新方法实现倒计时
        if(totaltime2>0)
        {
            intervaletime -= Time.deltaTime;
            if(intervaletime<=0)
            {
                intervaletime += 1;
                totaltime2--;
                countdown2text.text = string.Format("{0:D2}:{1:D2}",
         (int)totaltime2 / 60, (int)totaltime1 % 60);

            }
        }
		
	}
}

3.将脚本挂到panel 上，并将两个按钮赋给脚本。

思路及方法总结：

        协程方法的运用：

StartCoroutine(Count_down());

 private IEnumerator Count_down(){

yield return new Waitforseconds(1.0f);

}