Question

以下协程在按UI按钮运行时将正常运行，并显示“ 3 ... 2 ... 1 ... 0”，然后消失。但是，当作为事件处理程序委托HandleRewardBasedVideoClosed（AdMob的一部分）的一部分运行时，它将显示“ 3 ... 1 ...”，然后消失。对于我的一生，我无法弄清楚为什么当以这两种不同方式调用时，它的行为会有所不同。

public IEnumerator Countdown() {

    timeLeft = 3;

    while (timeLeft >= 0) {
        countdownText.text = timeLeft.ToString();
        yield return new WaitForSecondsRealtime(1.0f);
        timeLeft--;
    }

    if (timeLeft < 0) {
        countdownText.gameObject.SetActive (false);
    }

}

public void HandleRewardBasedVideoClosed(object sender, EventArgs args){

    MonoBehaviour.print("HandleRewardBasedVideoClosed event received");

    if (reward) {
        StartCoroutine ( gm.Countdown ());
    } else
        SceneManager.LoadScene (SceneManager.GetActiveScene ().name);

}

Answer 1

我对此很怀疑。倒数计时实际上是在如此快地执行“ 3.2 .. 2.1 .. 0.SetActive（false）”，以至于您看不到它运行协程两次吗？如果是这样，以下代码将解决该特定问题（如果是这种情况）：

private bool isCountingDown = false;

public IEnumerator Countdown()
{
    if ( isCountingDown ) return;
    isCountingDown = true;

    for ( int timeLeft = 3; timeLeft >= 0; timeLeft-- )
    {
        countdownText.text = timeLeft.ToString();
        yield return new WaitForSecondsRealtime(1.0f);
    }

    countdownText.gameObject.SetActive (false);
    isCountingDown = false;
}

public void HandleRewardBasedVideoClosed(object sender, EventArgs args)
{
    MonoBehaviour.print("HandleRewardBasedVideoClosed event received");
    if (reward) {
        // This might be a redundant check, as we're doing this in the 
        // Coroutine, but we may as well not go through the process of 
        // calling it in the first place.
        if (! isCountingDown ) StartCoroutine ( gm.Countdown ());
    } else
        SceneManager.LoadScene (SceneManager.GetActiveScene ().name);
}

当通常称为VS时，协程的行为有所不同。通过事件处理程序

1 个答案: