NGUI实现简单的倒计时组件

using System;
using UnityEngine;

public enum ETimerType
{
    CommonFormat,     // 78 77 76 75 ...
    TimeFormat,       //以时间格式显示倒计时
}

//自定义时间
public class CustomTime
{
    public int Days, Hours, Minutes, Seconds;

    public CustomTime(int seconds)
    {
        Days = seconds / 86400;

        seconds = seconds - Days * 86400;
        Hours = seconds / 3600;

        seconds = seconds - Hours * 3600;
        Minutes = seconds / 60;

        Seconds = seconds % 60;
    }

    public string GetTimeFormat()
    {
        string formatTime = "";
        if (Days > 0)
        {
            formatTime = string.Format("{0}天{1}:{2}:{3}", Days.ToString(), Hours.ToString("D2"), Minutes.ToString("D2"), Seconds.ToString("D2"));
        }
        else if (Hours > 0)
        {
            formatTime = string.Format("{0}:{1}:{2}", Hours.ToString("D2"), Minutes.ToString("D2"), Seconds.ToString("D2"));
        }
        else if (Minutes > 0)
        {
            formatTime = string.Format("{0}:{1}", Minutes.ToString("D2"), Seconds.ToString("D2"));
        }
        else if (Seconds > 0)
        {
            formatTime = string.Format("{0}", Seconds.ToString("D2"));
        }
        return formatTime;
    }
}

[RequireComponent(typeof(UILabel))]
public class LabelTimer : MonoBehaviour
{
    public delegate void OnFinish();
    public event OnFinish EvFinish;

    public int totalTime = 0;
    public float interval = 0;

    ETimerType timerType = ETimerType.CommonFormat;
    UILabel mLabel = null;

    void Start()
    {
        mLabel = GetComponent<UILabel>();
    }

    void Update()
    {
        interval += Time.deltaTime;
        if (interval >= 1)
        {
            --totalTime;
            ShowTime();
            interval = 0;
        }

        if (totalTime <= 0)
        {
            enabled = false;
            gameObject.SetActive(false);
            if (null != EvFinish)
                EvFinish();
        }
    }

    void ShowTime()
    {
        if (timerType == ETimerType.CommonFormat)
        {
            mLabel.text = totalTime.ToString();
        }
        else if (timerType == ETimerType.TimeFormat)
        {
            CustomTime ct = new CustomTime(totalTime);
            mLabel.text = ct.GetTimeFormat();
        }
    }

    public void Stop()
    {
        gameObject.SetActive(false);
        totalTime = 0;
        EvFinish = null;
    }

    public bool TimeKeeping
    {
        get
        {
            return totalTime > 0;
        }
    }

    public void StartCountDown(int totalTime, ETimerType timerType)
    {
        this.timerType = timerType;
        if (null == mLabel)
            mLabel = GetComponent<UILabel>();
        this.totalTime = totalTime;
        interval = 0;
        enabled = true;
        ShowTime();
        if (!gameObject.activeSelf)
            gameObject.SetActive(true);
    }

    public static LabelTimer Begin(GameObject go, int totalTime, ETimerType timerType = ETimerType.CommonFormat)
    {
        LabelTimer lt = go.GetComponent<LabelTimer>();
        if (null == lt) lt = go.AddComponent<LabelTimer>();
        lt.StartCountDown(totalTime, timerType);
        return lt;
    }
}