/// <summary>
/// 替换一个已经存在的倒计时任务
/// </summary>
/// <param name="tid">任务ID</param>
/// <param name="callback">回调(int)</param>
/// <param name="totalTime">任务总时间</param>
/// <returns>替换结果</returns>
public bool ReplaceCountdownTask(int tid, Action <int> callback, int totalTime)
{
return(timer.ReplaceCountdownTask(tid, callback, totalTime));
}