Vuforia 10.20.3中TrackableBehaviour与ITrackableEventHandler替代方案咨询

在Vuforia 10.20.3版本中，TrackableBehaviour和ITrackableEventHandler已被弃用并移除，导致原有代码出现以下编译错误：

CS0246: The type or namespace name 'ITrackableEventHandler' could not be found (are you missing a using directive or an assembly reference?)
CS0246: The type or namespace name 'TrackableBehaviour' could not be found (are you missing a using directive or an assembly reference?)

以下是适配Vuforia 10.20.3的替代实现：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Vuforia;

public class MerajAudioPlayScript : MonoBehaviour
{
    protected ObserverBehaviour mObserverBehaviour;
    protected ObserverBehaviour.Status mPreviousStatus;
    protected ObserverBehaviour.Status mNewStatus;
    public AudioSource a;

    void Start()
    {
        mObserverBehaviour = GetComponent<ObserverBehaviour>();
        if (mObserverBehaviour != null)
            mObserverBehaviour.StatusChanged += OnObserverStatusChanged;
    }

    private void OnObserverStatusChanged(ObserverBehaviour.StatusChangedData data)
    {
        mPreviousStatus = data.PreviousStatus;
        mNewStatus = data.NewStatus;
        
        Debug.Log($"Trackable {mObserverBehaviour.TrackableName} {mNewStatus} -- {mObserverBehaviour.CurrentStatusInfo}");

        if (mNewStatus == ObserverBehaviour.Status.DETECTED ||
            mNewStatus == ObserverBehaviour.Status.TRACKED ||
            mNewStatus == ObserverBehaviour.Status.EXTENDED_TRACKED)
        {
            OnTrackingFound();
        }
        else if (mPreviousStatus == ObserverBehaviour.Status.TRACKED &&
                 mNewStatus == ObserverBehaviour.Status.NO_POSE)
        {
            OnTrackingLost();
        }
        else
        {
            OnTrackingLost();
        }
    }

    protected virtual void OnTrackingFound()
    {
        // 识别到目标时的逻辑，比如播放音频
        a.Play();
    }

    protected virtual void OnTrackingLost()
    {
        a.Stop();
    }

    private void OnDestroy()
    {
        // 取消事件订阅，避免内存泄漏
        if (mObserverBehaviour != null)
            mObserverBehaviour.StatusChanged -= OnObserverStatusChanged;
    }
}

关键变化说明 #

• 用ObserverBehaviour替代原有的TrackableBehaviour，它是Vuforia 10+中所有可追踪对象（图像、模型等）的基类
• 不再实现ITrackableEventHandler接口，改为通过订阅StatusChanged事件监听状态变化
• 状态枚举使用ObserverBehaviour.Status，原有状态值（如DETECTED、TRACKED、NO_POSE等）保持兼容
• 新增OnDestroy方法取消事件订阅，避免内存泄漏

内容的提问来源于stack exchange，提问作者Meraj Aslam