读取 Unity HoloLens 项目中的 XML 个文件：在编辑器中工作，而不是在部署的项目中工作

Question

我正在尝试保存和加载自定义 class 'Animation'（四元数列表，一个 int 表示 ID，一个 int 表示有多少个游戏对象要设置动画），并且保存部分在 HoloLens 上工作得很好，但加载部分由于某些原因只能在 PC 上工作。在 HoloLens 上，它 returns 错误："There is an error in XML document (2, 2)."

我已经尝试使用 StreamingAssets 而不是 'persistentDataPath' 来处理我的文件，但是在 HoloLens 上，我再次收到一条错误，说明对文件的访问被拒绝。

我也试过使用 TextReader 和 StreamReader 加载 'Animation'，但结果完全一样。

我也试过使用 StreamWriter 编写 'Animation'，但结果也没有改变。

我已经加入了 class 的代码，负责编写和加载 XML 文件，以及 'SaveAnimation' 函数写入的示例每次都成功。

知道问题出在哪里吗？我很确定问题出在我如何编写 XML 文件，但我似乎找不到解决方案。

代码为Save/Load class:

using System.IO;
using System.Xml.Serialization;
using UnityEngine;

public class AnimationSaverLoader : MonoBehaviour {

    private string baseFilename = "animation";

    private string path;

    public bool SaveAnimation(Animation animation)
    {
        int animationID = animation.AnimationID;
        path = Path.GetFullPath(Path.Combine(Application.persistentDataPath, baseFilename + animationID + ".xml"));

        try
        {
            using (FileStream writer = new FileStream(path, FileMode.Create))
            {
                XmlSerializer serializer = new XmlSerializer(typeof(Animation));
                serializer.Serialize(writer, animation);
            }
            return true;
        }
        catch (System.Exception e)
        {
            Debug.LogWarning("Error saving animation : " + e.Message);
            return false;
        }
    }

    public Animation LoadAnimation(int animationID)
    {
        path = Path.GetFullPath(Path.Combine(Application.persistentDataPath, baseFilename + animationID + ".xml"));
        Animation deserialized = null;

        try
        {
            using (FileStream reader = File.Open(path, FileMode.Open))
            {
                XmlSerializer serializer = new XmlSerializer(typeof(Animation));
                deserialized = (Animation)serializer.Deserialize(reader);
            }
        }
        catch (System.Exception e)
        {
            Debug.LogWarningFormat("Error loading animation : {0}", e.Message);
        }

        Debug.LogFormat("deserialized is null : {0}", deserialized == null);

        return deserialized;
    }

以及 'SaveAnimation' 函数的 XML 输出示例：

<?xml version="1.0" encoding="utf-8"?>
<Animation xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <nbAnimatables>7</nbAnimatables>
  <animationID>1</animationID>
  <points>
    <ArrayOfQuaternion>
      <Quaternion>
        <x>0</x>
        <y>0</y>
        <z>0</z>
        <w>1</w>
        <eulerAngles>
          <x>-0</x>
          <y>0</y>
          <z>0</z>
        </eulerAngles>
      </Quaternion>
      <Quaternion>
        <x>0</x>
        <y>0</y>
        <z>0</z>
        <w>1</w>
        <eulerAngles>
          <x>-0</x>
          <y>0</y>
          <z>0</z>
        </eulerAngles>
      </Quaternion>
      <Quaternion>
        <x>-0</x>
        <y>-0</y>
        <z>-0</z>
        <w>1</w>
        <eulerAngles>
          <x>-0</x>
          <y>0</y>
          <z>0</z>
        </eulerAngles>
      </Quaternion>
      <Quaternion>
        <x>-0.229409814</x>
        <y>0.0272422452</y>
        <z>-0.114730783</z>
        <w>0.966160357</w>
        <eulerAngles>
          <x>334.0847</x>
          <y>6.722004</y>
          <z>344.9074</z>
        </eulerAngles>
      </Quaternion>
      <Quaternion>
        <x>-0.0120867919</x>
        <y>0.009940858</y>
        <z>-0.0253626034</z>
        <w>0.9995558</w>
        <eulerAngles>
          <x>358.644348</x>
          <y>1.17417169</y>
          <z>357.0791</z>
        </eulerAngles>
      </Quaternion>
      <Quaternion>
        <x>0.2436451</x>
        <y>-0.03456776</y>
        <z>0.0332907774</z>
        <w>0.9686763</w>
        <eulerAngles>
          <x>28.3156128</x>
          <y>356.695343</y>
          <z>3.10282016</z>
        </eulerAngles>
      </Quaternion>
      <Quaternion>
        <x>-0.0274707</x>
        <y>-0.004143617</y>
        <z>0.0005820858</z>
        <w>0.9996139</w>
        <eulerAngles>
          <x>356.852</x>
          <y>359.5228</y>
          <z>0.0798406</z>
        </eulerAngles>
      </Quaternion>
    </ArrayOfQuaternion>
    <ArrayOfQuaternion>
      <Quaternion>
        <x>-0</x>
        <y>-0</y>
        <z>0.5602086</z>
        <w>0.8283516</w>
        <eulerAngles>
          <x>-0</x>
          <y>-0</y>
          <z>68.14045</z>
        </eulerAngles>
      </Quaternion>
      <Quaternion>
        <x>0</x>
        <y>0</y>
        <z>0</z>
        <w>1</w>
        <eulerAngles>
          <x>-0</x>
          <y>0</y>
          <z>0</z>
        </eulerAngles>
      </Quaternion>
      <Quaternion>
        <x>-0</x>
        <y>-0</y>
        <z>-0</z>
        <w>1</w>
        <eulerAngles>
          <x>-0</x>
          <y>0</y>
          <z>0</z>
        </eulerAngles>
      </Quaternion>
      <Quaternion>
        <x>-0.229409814</x>
        <y>0.0272422452</y>
        <z>-0.114730783</z>
        <w>0.966160357</w>
        <eulerAngles>
          <x>334.0847</x>
          <y>6.722004</y>
          <z>344.9074</z>
        </eulerAngles>
      </Quaternion>
      <Quaternion>
        <x>-0.0120867919</x>
        <y>0.009940858</y>
        <z>-0.0253626034</z>
        <w>0.9995558</w>
        <eulerAngles>
          <x>358.644348</x>
          <y>1.17417169</y>
          <z>357.0791</z>
        </eulerAngles>
      </Quaternion>
      <Quaternion>
        <x>0.243645117</x>
        <y>-0.0345677622</y>
        <z>0.03329078</z>
        <w>0.9686764</w>
        <eulerAngles>
          <x>28.3156128</x>
          <y>356.695343</y>
          <z>3.10282016</z>
        </eulerAngles>
      </Quaternion>
      <Quaternion>
        <x>-0.0274707</x>
        <y>-0.004143617</y>
        <z>0.0005820858</z>
        <w>0.9996139</w>
        <eulerAngles>
          <x>356.852</x>
          <y>359.5228</y>
          <z>0.0798406</z>
        </eulerAngles>
      </Quaternion>
    </ArrayOfQuaternion>
  </points>
</Animation>

编辑：认为 'Animation' class 也很有用。

using UnityEngine;
using System.Collections.Generic;
using System.Xml.Serialization;

[XmlRoot("Animation")]
public class Animation {

    [XmlElement("nbAnimatables")]
    public int NbAnimatables { get; set; }
    [XmlElement("animationID")]
    public int AnimationID { get; set; }

    [XmlArray("points")]
    public List<Quaternion[]> Points { get; private set; }

    public Animation()
    {
    }

    public Animation(int nbAnimatables, int animationID)
    {
        this.NbAnimatables = nbAnimatables;
        this.AnimationID = animationID;
        Points = new List<Quaternion[]>();
    }

    public bool AddPoint(Quaternion[] animatableRotations)
    {
        if (animatableRotations.Length == NbAnimatables)
        {
            Points.Add(animatableRotations);
            return true;
        }
        return false;
    }

    public bool OverridePoint(Quaternion[] animatableRotations, int pointIndex)
    {
        if (pointIndex < Points.Count)
        {
            Points[pointIndex] = animatableRotations;
            return true;
        }
        return false;
    }

    public bool RemovePoint(int pointIndex)
    {
        if (pointIndex < Points.Count)
        {
            Points.RemoveAt(pointIndex);
            return true;
        }
        return false;
    }
}

Answer 1

尝试以下操作：

            XmlWriterSettings settings = new XmlWriterSettings();
            settings.Indent = true;
            XmlWriter writer = XmlWriter.Create(path, settings);
            XmlSerializer serializer = new XmlSerializer(typeof(Animation));
            serializer.Serialize(writer, animation);

Answer 2

我会尝试使用 StorageFile API :

Windows.Storage.StorageFolder storageFolder = Windows.Storage.ApplicationData.Current.LocalFolder;
string fileName = baseFilename + animationID + ".xml");
Windows.Storage.StorageFile sampleFile = await storageFolder.CreateFileAsync(fileName,   Windows.Storage.CreationCollisionOption.ReplaceExisting);
using (var stream = await sampleFile.OpenAsync(Windows.Storage.FileAccessMode.ReadWrite);)
{
    using (var outputStream = stream.GetOutputStreamAt(0))
    {
       XmlSerializer serializer = new XmlSerializer(typeof(Animation));
       serializer.Serialize(stream, animation);
       await outputStream.FlushAsync();
    }
}

有关 Create, write, and read a file for UWP Apps

的更多信息

Answer 3

听从 jdweng 的建议，我决定改变我写文件的方式。我再次尝试了 StreamWriter，由于某种原因，它成功了！我通过这个更改了第 18 行的代码：

        using (StreamWriter writer = new StreamWriter(File.Create(path)))
        {
            XmlSerializer serializer = new XmlSerializer(typeof(Animation));
            serializer.Serialize(writer, animation);
        }

读取 Unity HoloLens 项目中的 XML 个文件：在编辑器中工作，而不是在部署的项目中工作

Reading XML files in a Unity HoloLens project : works in Editor, not in deployed project

c#

xml

unity3d

uwp

hololens