本文共 8023 字，大约阅读时间需要 26 分钟。

一：C#中与时间相关的两个类：DateTime和TimeSpan

TimeSpan是C#中的一个类，常用以下几种方法

using System;using UnityEngine;public class Test : MonoBehaviour{    private void Awake()    {        //将TimeSpan结构的新实例初始化为指定的刻度数        TimeSpan t1 = new TimeSpan(36); //00:00:00.0000036        //将TimeSpan结构的新实例初始化为指定的小时数、分钟数和秒数        TimeSpan t2 = new TimeSpan(20, 35, 21); //20:35:21        //将TimeSpan结构的新实例初始化为指定的天数、小时数、分钟数和秒数        TimeSpan t3 = new TimeSpan(4, 20, 35, 21); //4:20:35:21        TimeSpan t4 = new TimeSpan(4, 24, 35, 21); //*****自动进位5:00:35:21        //将TimeSpan结构的新实例初始化为指定的天数、小时数、分钟数、秒数和毫秒数(1秒=1000毫秒)        TimeSpan t5 = new TimeSpan(4, 20, 35, 21, 60); //4:20:35:21:0600000        //直接取出TimeSpan结构所表示的时间间隔的天数、小时数、分钟数、秒数和毫秒数        TimeSpan t6 = new TimeSpan(4, 20, 35, 21, 60);        Debug.Log(String.Format("天数：{0}\n小时数：{1}\n分钟数：{2}\n秒数：{3}\n毫秒数：{4}", t6.Days, t6.Hours, t6.Minutes, t6.Seconds,            t6.Milliseconds)); //天数：4    小时数：20    分钟数：35    秒数：21    毫秒数：60        //将TimeSpan结构所表示的时间间隔换算成等效天数、小时数、分钟数、秒数和毫秒数        TimeSpan t7 = new TimeSpan(4, 20, 35, 21, 60);        Debug.Log(String.Format("等效天数：{0}\n等效小时数：{1}\n等效分钟数：{2}\n等效秒数：{3}\n等效毫秒数：{4}", t7.TotalDays, t7.TotalHours, t7.TotalMinutes, t7.TotalSeconds,            t7.TotalMilliseconds)); //等效天数：4.857...    等效小时数：116.58...    等效分钟数：6995.3...    等效秒数：419721...    等效毫秒数：419721060    }}

二：实现离线计时器

要获取离线时间，需要得到两个数据，离线时的时间和再次启动的时间，再次启动的时间通过这个防作弊的类去获取(修改系统时间或修改系统时区都无效，直接将IOS和Android的类库导入到项目中：)

using System;using UnityEngine;public class OfflineMgr : MonoBehaviour{    private void OnApplicationPause(bool pause)    {        if (pause)        {            PlayerPrefs.SetString("lastOffline", UnbiasedTime.Ins.Now().ToBinary().ToString());        }        else        {            //TODO：获得离线收益        }    }    private void OnApplicationQuit()    {    }    public double GetOfflineTime()    {        string lastOfflineTime = PlayerPrefs.GetString("lastOffline", "0");        DateTime last = DateTime.FromBinary(long.Parse(lastOfflineTime));        DateTime now = UnbiasedTime.Ins.Now();        double restTime = (now - last).TotalSeconds;        return restTime;    }}

using UnityEngine;using System;using System.Collections;using System.Runtime.InteropServices;using System.Threading;/// 
/// 防作弊时间/// 
public class UnbiasedTime : MonoBehaviour{    const bool UseTimeZone_CN = true;//是否为中国时区+8    const int TimeZone_CN = 8;//中国时区    private static UnbiasedTime _instance;    public static UnbiasedTime Ins    {        get        {            if (_instance != null) return _instance;            var go = new GameObject("UnbiasedTime");            _instance = go.AddComponent
   
    ();            DontDestroyOnLoad(go);            return _instance;        }    }    // Estimated difference in seconds between device time and real world time    // timeOffset = deviceTime - worldTime;    [HideInInspector] public long timeOffset = 0;    void Awake()    {        SessionStart();    }    void OnApplicationPause(bool pause)    {        if (pause)        {            SessionEnd();        }        else        {            SessionStart();        }    }    void OnApplicationQuit()    {        SessionEnd();    }    /// 
    
    /// 获取当前时间    /// 
    public DateTime Now()    {        if (UseTimeZone_CN)        {            return getNow().ToUniversalTime().AddHours(TimeZone_CN);        }        else        {            return getNow();        }    }    private DateTime getNow()    {        return DateTime.Now.AddSeconds(-1.0f * timeOffset);    }    // timeOffset value is cached for performance reasons (calls to native plugins can be expensive).     // This method is used to update offset value in cases if you think device time was changed by user.     //     // However, time offset is updated automatically when app gets backgrounded or foregrounded.     //     public void UpdateTimeOffset()    {#if UNITY_ANDROID		UpdateTimeOffsetAndroid();#elif UNITY_IPHONE        UpdateTimeOffsetIOS();#endif    }    // Returns true if native plugin was unable to calculate unbiased time and had fallen back to device DateTime.     // This can happen after device reboot. Player can cheat by closing the game, changing time and rebooting device.     // This method can help tracking this situation.     public bool IsUsingSystemTime()    {#if UNITY_ANDROID		return UsingSystemTimeAndroid();#elif UNITY_IPHONE        return UsingSystemTimeIOS();#else        return true;#endif    }    private void SessionStart()    {#if UNITY_ANDROID		StartAndroid();#elif UNITY_IPHONE        StartIOS();#endif    }    private void SessionEnd()    {#if UNITY_ANDROID		EndAndroid();#elif UNITY_IPHONE        EndIOS();#endif    }    /// 
    
    /// Platform specific code    /// 
#if UNITY_IPHONE    [DllImport("__Internal")]    private static extern void _vtcOnSessionStart();    [DllImport("__Internal")]    private static extern void _vtcOnSessionEnd();    [DllImport("__Internal")]    private static extern int _vtcTimestampOffset();    [DllImport("__Internal")]    private static extern int _vtcUsingSystemTime();    private void UpdateTimeOffsetIOS()    {        if (Application.platform != RuntimePlatform.IPhonePlayer)        {            return;        }        timeOffset = _vtcTimestampOffset();    }    private void StartIOS()    {        if (Application.platform != RuntimePlatform.IPhonePlayer)        {            return;        }        _vtcOnSessionStart();        timeOffset = _vtcTimestampOffset();    }    private void EndIOS()    {        if (Application.platform != RuntimePlatform.IPhonePlayer)        {            return;        }        _vtcOnSessionEnd();    }    private bool UsingSystemTimeIOS()    {        if (Application.platform != RuntimePlatform.IPhonePlayer)        {            return true;        }        return _vtcUsingSystemTime() != 0;    }#endif#if UNITY_ANDROID	private void UpdateTimeOffsetAndroid() {		if (Application.platform != RuntimePlatform.Android) {			return;		}		using (var activityClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer")) 		using (var unbiasedTimeClass = new AndroidJavaClass("com.vasilij.unbiasedtime.UnbiasedTime")) {			var playerActivityContext = activityClass.GetStatic
    
     ("currentActivity");			if (playerActivityContext != null && unbiasedTimeClass != null) {				timeOffset = unbiasedTimeClass.CallStatic 
     
       ("vtcTimestampOffset", playerActivityContext);			}		}			}	private void StartAndroid() {		if (Application.platform != RuntimePlatform.Android) {			return;		}		using (var activityClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer"))		using (var unbiasedTimeClass = new AndroidJavaClass("com.vasilij.unbiasedtime.UnbiasedTime")) {			var playerActivityContext = activityClass.GetStatic
      
       ("currentActivity");			if (playerActivityContext != null && unbiasedTimeClass != null) {				unbiasedTimeClass.CallStatic ("vtcOnSessionStart", playerActivityContext);				timeOffset = unbiasedTimeClass.CallStatic 
       
         ("vtcTimestampOffset");			}		}	}	private void EndAndroid() {		if (Application.platform != RuntimePlatform.Android) {			return;		}		using (var activityClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer")) 		using (var unbiasedTimeClass = new AndroidJavaClass("com.vasilij.unbiasedtime.UnbiasedTime")) {			var playerActivityContext = activityClass.GetStatic
        
         ("currentActivity"); if (playerActivityContext != null && unbiasedTimeClass != null) { unbiasedTimeClass.CallStatic ("vtcOnSessionEnd", playerActivityContext); } } } private bool UsingSystemTimeAndroid() { if (Application.platform != RuntimePlatform.Android) { return true; } using (var activityClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer")) using (var unbiasedTimeClass = new AndroidJavaClass("com.vasilij.unbiasedtime.UnbiasedTime")) { var playerActivityContext = activityClass.GetStatic
         
          ("currentActivity"); if (playerActivityContext != null && unbiasedTimeClass != null) { return unbiasedTimeClass.CallStatic 
          
            ("vtcUsingDeviceTime"); } } return true; }#endif}
          
         
        
       
      
     
    
   

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