//主要是用来判斷是否完成任務
IEnumerator TaskStateMonitor()
{
yield return(null);
IEnumerator e = coroutine;
while (state == State.Running)
{
if (state == State.Paused)
{
yield return(null);
}
else
{
//IEnumerator 有current ，movenext，reset
//不停地執行new出来的任務，因为new出来的任務是Enumrator，直到不能movenext了
if (e != null && e.MoveNext())
{
yield return(e.Current);
}
else
{
state = State.Finished;
}
}
}
FinishedHander handler = Finished;
if (handler != null)
{
handler(true); //true
}
}
void TaskFinished(bool isFinished)
{
FinishedHander handler = Finished;
if (handler != null)
{
handler(isFinished);
}
}
