Unity 协同程序

void Start()
{
  //开始运行协同程序
  StartCoroutine(WaitAndGo(1.0f));
  print("waiting..."); //2
}

IEnumerator WaitAndGo(float duration)
{
  print("Ready"); //1
  //仅等待duration所指定的秒数
  yield return new WaitForSeconds(duration);
  print("Go!"); //3
}

按1，2，3顺序执行