unity waitforseconds

void Update() {  if(Input.GetKey(KeyCode.Mouse0)){    StartCoroutine (Func ());      } }IEnumerator Func (){     yield return new WaitForSeconds(0.5);      Instantiate(prefab,cube.position,cube.rotation);      prefab.velocity = transform.TransformDirection(Vector3.forward*1000);     yield return WaitForSeconds(0.5f);}

 yield return new WaitForSeconds(0.5);

写在第一行，这样需要等待0.5秒，执行完成后面的语句，下一帧继续从yield这里开始执行，

再等待0.5秒，循环到下一帧