持续一段时间后重新启动级别Ontrigger

Question

I would like to restart a level when a character enters a Trigger (which is the end of a race) after 5 or 10 seconds.

I have a script that look like this :

public class WinBox : MonoBehaviour
{
    public Camera Camera1;
    private void OnTriggerEnter(Collider other)
    { 
        GameObject.Find("Camera (eye)").SendMessage("StopTimer");
    }
}

What should I add to make the level restart after the time that I want to define?

Answer 1

You can use coroutines to delay the call of the SceneManager . LoadScene function, along with the GetActiveScene function to get the information about the current scene :

private IEnumerator RestartSceneAfterDelay( float delay = 10f )
{
    yield return new WaitForSeconds( delay );
    SceneManager.LoadScene( SceneManager.GetActiveScene().buildIndex ) ;
}

And call the function as follow :

private void OnTriggerEnter(Collider other)
{ 
    GameObject.Find("Camera (eye)").SendMessage("StopTimer");

    StartCoroutine( RestartSceneAfterDelay() ) ;
    // OR
    StartCoroutine( RestartSceneAfterDelay(5f) ) ;      
}

---

An other solution (but not as good as the first one) is to use the Invoke function to delay the call to the Scene manager. Though, avoid this way because the call to the function is made from a string, which is hard to debug afterwards.

private void RestartScene()
{
    SceneManager.LoadScene( SceneManager.GetActiveScene().buildIndex ) ;
}

private void OnTriggerEnter(Collider other)
{ 
    GameObject.Find("Camera (eye)").SendMessage("StopTimer");

    Invoke( "RestartScene", 5f ) ;
}

Answer 2

To do something after a delay you could make an utility function like this:

static class Utils 
{
    public static IEnumerator DoAfterDelay(float delay, System.Action callback) 
    {
        yield return new WaitForSeconds(delay);
        callback();
    }
}

And then call it with StartCoroutine Like this

private void RestartLevel() 
{
    SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex);
}

private void OnTriggerEnter(Collider other)
{ 
    GameObject.Find("Camera (eye)").SendMessage("StopTimer");
    float secondsUntilRestart = 10;
    StartCoroutine(Utils.DoAfterDelay(secondsUntilRestart, RestartLevel));
}

From my experience, you often need this DoAfterDelay functionality, that's why I'd place it in a separate class instead of making it a local, private method