如何在特定情况下统一退出协程？
我在统一协程方面遇到一些问题。我希望我的玩家在到达门口时（发生碰撞时）在 3 秒后进入塔内，并且如果他在距离门不到 3 秒的时间内移动，则关闭门并且不加载新场景。我尝试了大部分的事情，但没有用。有人可以帮助我或给我一些提示吗？
这是我的代码：
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Door : MonoBehaviour
{
[SerializeField] private Animator animator;
bool open = false;
// Start is called before the first frame update
void Start()
{
animator = GetComponent<Animator>();
}
// Update is called once per frame
void Update()
{
}
public void OnTriggerStay2D(Collider2D collider)
{
if (collider.gameObject.tag == "Player")
{
animator.SetBool("opening", true);
StartCoroutine("LoadLevelTowerAfterDelay");
}
else
{
animator.SetBool("opening", false);
StopCoroutine("LoadLevelTowerAfterDelay");
}
}
IEnumerator LoadLevelTowerAfterDelay()
{
if (GameManager.sharedInstance != null)
{
yield return new WaitForSeconds(3);
GameManager.sharedInstance.LoadLevelTower();
}
}
}
i have some problems with coroutines in unity. I want that my player when he gets to the door (when a collision occurs) to enter in the tower after 3 seconds, and if he moves within less than 3 seconds from the door to close the door and not load a new scene. I tried most of things but doesn't work. Can somebody help or give me some hint?
Here is my code:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Door : MonoBehaviour
{
[SerializeField] private Animator animator;
bool open = false;
// Start is called before the first frame update
void Start()
{
animator = GetComponent<Animator>();
}
// Update is called once per frame
void Update()
{
}
public void OnTriggerStay2D(Collider2D collider)
{
if (collider.gameObject.tag == "Player")
{
animator.SetBool("opening", true);
StartCoroutine("LoadLevelTowerAfterDelay");
}
else
{
animator.SetBool("opening", false);
StopCoroutine("LoadLevelTowerAfterDelay");
}
}
IEnumerator LoadLevelTowerAfterDelay()
{
if (GameManager.sharedInstance != null)
{
yield return new WaitForSeconds(3);
GameManager.sharedInstance.LoadLevelTower();
}
}
}
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评论（3）
只是为了完成，
您可以使用
yield break从内部退出/完成协程，一个例子是：
这样您就可以抢先结束协程，而不是等待 4 秒，并且不执行 DoOtherStuff();
Just for Completion
you can exit/finish the coroutine from within with
yield breakan example would be:
this way you would preemptively end the coroutine, not wait 4 seconds and don't DoOtherStuff();
OnTriggerStay2D被调用每个物理更新帧！您绝对不想在每个物理帧启动一个新的协程！
您更想做的是使用
OnTriggerEnter2D和OnTriggerExit2D，例如一般来说这应该已经可以工作，但要保存，您可以存储启动的例程，如此处也提到
OnTriggerStay2Dis called every physics update frame!You definitely do NOT want to start a new coroutine every physics frame!
What you rather want to do is using
OnTriggerEnter2DandOnTriggerExit2Dlike e.g.in general this should already work but to be save you could store the started routine as also mentioned here
一种选择是：如果发生某些事情让您想要取消操作，请在某处设置一个布尔值，并在协程中紧邻
LoadLevelTower()行之前检查它。另一种选择是保留对协程的引用（例如 Coroutine c = StartCoroutine("LoadLevelTowerAfterDelay");），然后如果发生某些事情让您想要中止它，请使用 StopCoroutine(c ）；。
我认为您更大的问题可能是您使用
OnTriggerStay2D。在我看来，当玩家在对撞机内时，您每帧都会调用StartCoroutine，而当玩家以外的物体StopCoroutine > 在碰撞器内。也许您想使用 OnTriggerEnter2D 来检查玩家是否进入，并使用 OnTriggerExit2D 来检查玩家是否退出？One option is: If something happens that makes you want to cancel the operation, set a boolean somewhere and check for it immediately before the
LoadLevelTower()line in the coroutine.Another option is to keep a reference to the coroutine (e.g.
Coroutine c = StartCoroutine("LoadLevelTowerAfterDelay");), then if something happens that makes you want to abort it, useStopCoroutine(c);.I think your larger problem might be in your use of
OnTriggerStay2Dthough. To me it looks like you’re callingStartCoroutineevery frame while a player is within the collider, andStopCoroutineevery frame while something other than a player is within the collider. Probably you instead want to be usingOnTriggerEnter2Dto check for a player entering, andOnTriggerExit2Dto check for a player exiting?