vuforia 不接受 AR 统一应用程序的旧脚本

Question

我的朋友为我创建了一个代码，让我在统一中使用 vuforia 创建一个 AR 应用程序，它完全可以正常工作。 现在我使用新版本的 vuforia 安装新的统一它显示一些错误我发现应用了一些更改，例如“MonoBehaviour，ITrackableEventHandler”更改为“DefaultTrackableEventHandler”，但我有一些无法理解的错误：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Vuforia;
using System;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Threading;

public class Shutter0 : DefaultTrackableEventHandler
{
TrackableBehaviour mTrackableBehaviour;
GameObject derakht;
string IP;
public int port;
GameObject TextMesh;
public string myText;
// "connection" things
IPEndPoint remoteEndPoint;
UdpClient client;

// Start is called before the first frame update
void Start()
{
    derakht = GameObject.Find("derakht");
    mTrackableBehaviour = GetComponent<TrackableBehaviour>();
    if (mTrackableBehaviour)
    {
        mTrackableBehaviour.RegisterTrackableEventHandler(this);
    }
    //OnTrackingLost();
    IP = "127.0.0.1";
    port = 8050;
    string myText = "25j";
    remoteEndPoint = new IPEndPoint(IPAddress.Parse(IP), port);
    client = new UdpClient();
    // status
    print("Sending to " + IP + " : " + port);
}
// Implementation of the ITrackableEventHandler function called when the
// tracking state changes.
public void OnTrackableStateChanged(
 TrackableBehaviour.Status previousStatus,
 TrackableBehaviour.Status newStatus)
{
    if (newStatus == TrackableBehaviour.Status.DETECTED ||
        newStatus == TrackableBehaviour.Status.TRACKED)
    {
        OnTrackingFound();
    }

}

private void OnTrackingFound()
{
    try
    {
        // encode string to UTF8-coded bytes
        myText = "0";
        byte[] data = Encoding.UTF8.GetBytes(myText);
        // send the data
        client.Send(data, data.Length, remoteEndPoint);
    }
    catch (Exception err)
    {
        print(err.ToString());
    }
}
}

Answer 1

错误应该是不言自明的

TrackableBehaviour不包含RegisterTrackableEventHandler的定义

这种方法根本不存在（不再存在）。

---

你可能更喜欢RegisterOnTrackableStatusChanged

mTrackableBehaviour.RegisterOnTrackableStatusChanged(OnTrackableStateChanged);

---

顺便说一句，我不会继承DefaultTrackableEventHandler tbh .. 这有点糟糕^^

我宁愿实现我自己的喜欢

[RequireComponent(typeof(TrackableBehaviour))]
public class TrackableEventHandlerEvents : MonoBehaviour
{
    [SerializeField] private TrackableBehaviour _trackableBehaviour;

    public UnityEvent onTrackingFound;
    public UnityEvent onTrackingLost;

    private void Awake()
    {
        if(!_trackableBehaviour) _trackableBehaviour = GetComponent<TrackableBehaviour>();

        if(!_trackableBehaviour)
        {
            Debug.LogError($"This component requires a {nameof(TrackableBehaviour)} !", this);
            return;
        }

        _trackableBehaviour.RegisterOnTrackableStatusChanged(OnTrackableStateChanged);
    }

    /// <summary>
    /// called when the tracking state changes.
    /// </summary>
    private void OnTrackableStateChanged(TrackableBehaviour.Status previousStatus, TrackableBehaviour.Status newStatus)
    {
        switch(newStatus)
        { 
            case TrackableBehaviour.Status.DETECTED:
            case TrackableBehaviour.Status.TRACKED:
            case TrackableBehaviour.Status.EXTENDED_TRACKED:
                OnTrackingFound();
                break;
        
            default:
                OnTrackingLost();
                break;
        }
    }


    protected virtual void OnTrackingFound()
    {
        Debug.Log("Trackable " + _trackableBehaviour.TrackableName + " found");
        onTrackingFound.Invoke();
    }

    protected virtual void OnTrackingLost()
    {
        Debug.Log("Trackable " + _trackableBehaviour.TrackableName + " lost");
        onTrackingLost.Invoke();
    }
}

为什么？ → 因为这样你

• 可以让任何其他方法通过 Inspector 添加回调（如在按钮UnityEvent onClick ）或通过代码使用例如

   _trackableEventHandlerEvents.onTrackingLost.AddCallback(() => Debug.Log("Hello World;"));

• 您可以通过从该组件继承并扩展例如直接扩展方法

  protected override void OnTrackingFound() { // You can keep the default behavior // or if you remove this line you can completely overwrite the behavior base.OnTrackingFound(); // Additional behavior }