虽然两个答案都应该起作用，但是使用协程和该IsPlaying函数执行此操作的另一种方法。如果您还想在动画之后执行其他任务，则可以使用协程解决方案。

对于Animation系统：

旧的Unity动画播放系统。这应该 不是 在你的新项目，除非你还在使用旧版本的统一使用。

IEnumerator playAndWaitForAnim(GameObject target, string clipName)
{
    Animation anim = target.GetComponent<Animation>();
    anim.Play(clipName);

    //Wait until Animation is done Playing
    while (anim.IsPlaying(clipName))
    {
        yield return null;
    }

    //Done playing. Do something below!
    Debug.Log("Done Playing");
}

对于Animator系统

这是新的Unity动画播放系统。这 应该使用
在你的新项目，而不是AnimationAPI。在性能方面，最好使用Animator.StringToHash和通过哈希数比较当前状态，而不是使用IsName比较字符串的函数，因为哈希更快。

比方说，你有一个名为国家的名字Jump，Move和Look。您可以如下获得它们的哈希值，然后在下面使用该函数播放和等待它们：

const string animBaseLayer = "Base Layer";
int jumpAnimHash = Animator.StringToHash(animBaseLayer + ".Jump");
int moveAnimHash = Animator.StringToHash(animBaseLayer + ".Move");
int lookAnimHash = Animator.StringToHash(animBaseLayer + ".Look");

public IEnumerator PlayAndWaitForAnim(Animator targetAnim, string stateName)
{
    //Get hash of animation
    int animHash = 0;
    if (stateName == "Jump")
        animHash = jumpAnimHash;
    else if (stateName == "Move")
        animHash = moveAnimHash;
    else if (stateName == "Look")
        animHash = lookAnimHash;

    //targetAnim.Play(stateName);
    targetAnim.CrossFadeInFixedTime(stateName, 0.6f);

    //Wait until we enter the current state
    while (targetAnim.GetCurrentAnimatorStateInfo(0).fullPathHash != animHash)
    {
        yield return null;
    }

    float counter = 0;
    float waitTime = targetAnim.GetCurrentAnimatorStateInfo(0).length;

    //Now, Wait until the current state is done playing
    while (counter < (waitTime))
    {
        counter += Time.deltaTime;
        yield return null;
    }

    //Done playing. Do something below!
    Debug.Log("Done Playing");

}

对于专门针对您的特定问题的冲突回调函数（OnTriggerEnter）的解决方案，有两种可能的解决方法：

1。 检测到触发器后，启动协程功能以播放动画：

void OnTriggerEnter(Collider other)
{
    if (other.gameObject.name == "OnTop Detector")
    {
        Debug.Log("On Top of Platform");
        GameObject findGo = GameObject.Find("ThirdPersonController");
        GameObject findGo1 = GameObject.Find("Elevator");
        findGo.transform.parent = findGo1.transform;
        target = GameObject.Find("Elevator");
        StartCoroutine(playAnim(target));
    }
}

IEnumerator playAnim(GameObject target)
{
    Animation anim = target.GetComponent<Animation>();
    anim.Play("Up");

    //Wait until Up is done Playing the play down
    while (anim.IsPlaying("Up"))
    {
        yield return null;
    }

    //Now Play Down
    anim.Play("Down");
}

要么

2。 使OnTriggerEnter函数成为协程（IEnumerator）而不是void函数：

IEnumerator OnTriggerEnter(Collider other)
{
    if (other.gameObject.name == "OnTop Detector")
    {
        Debug.Log("On Top of Platform");
        GameObject findGo = GameObject.Find("ThirdPersonController");
        GameObject findGo1 = GameObject.Find("Elevator");
        findGo.transform.parent = findGo1.transform;
        target = GameObject.Find("Elevator");
        Animation anim = target.GetComponent<Animation>();
        anim.Play("Up");

        //Wait until Up is done Playing the play down
        while (anim.IsPlaying("Up"))
        {
            yield return null;
        }

        //Now Play Down
        anim.Play("Down");
    }
}