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c# - 无法将类型“UnityEngine.ScriptableObject”隐式转换为“T”

问题描述

public class UVBaseTool : ScriptableObject, IPropertiesChanged
{
    private BaseToolProperties properties_;
    private ScriptableObject propertiesNoValidate_;

    // Some code ...

    protected void SetProperties(System.Type propertiesType, System.Type properties1Type)
    {
        properties_ = propertiesType == null ? null : CreateInstance(propertiesType) as BaseToolProperties;
        if (properties_ != null)
        {
            properties_.tool = (this);
        }

        propertiesNoValidate_ = properties1Type == null ? null : CreateInstance(properties1Type);
    }

    public T Properties<T>()
    {
        return properties_;
    }

    public T PropertiesNoValidate<T>()
    {
        return propertiesNoValidate_;
    }
}

任何人都可以帮助我解决这个问题，因为我无法解决这些错误：

  1. Assets/Rocket/Archi/Scripts/Editor/UVEditor/UVBaseTool.cs(219,14)：错误 CS0029：无法隐式转换类型Rocket.Archi.BaseToolProperties' toT'
  2. Assets/Rocket/Archi/Scripts/Editor/UVEditor/UVBaseTool.cs(224,14)：错误 CS0029：无法隐式转换类型 UnityEngine.ScriptableObject' toT'

我尝试浏览 CS0029 的在线上下文，但我似乎仍然无法通过 IConvertable 进行转换。请让我知道是否有解决方案。

这就是我打电话给

[SerializeField]
private BaseToolProperties properties_;
[SerializeField]
private ScriptableObject propertiesNoValidate_;

public virtual void Start()
{
      EditorUtil.HideGlobalGizmo();
      ArchiEx.selectedElements.ClearVertexBoxes();
      ArchiEx.currentCamera = (Camera) null;
      GizmoHandler.Destroy();
      if (properties_ != null)
        EditorUtil.LoadObject(properties_, null);
      if (propertiesNoValidate_ != null)
        EditorUtil.LoadObject(propertiesNoValidate_, null);
      Ruler.Add(this, RulerType.Local);
      ArchiSettings.GatherArchi();
}

这是基础工具；

using System;
using UnityEngine;

namespace Rocket.Archi
{
  [Serializable]
  public class BaseToolProperties : ScriptableObject
  {
    [NonSerialized]
    public IPropertiesChanged tool;

    public virtual void OnValidate()
    {
      if (tool == null)
        return;
      tool.OnPropertiesChanged();
    }
  }
}

附加的图像显示了我如何在其他类中调用属性，相信我在这部分没有错误，我已经一次又一次地检查了所有上下文，但是这个通用函数正在杀死我。

如果我这样写，错误就会消失，但现在我收到另一个错误，它是针对 IConvertable 的。每当我尝试在场景视图中制作对象时，都会出现这个反复出现的错误。见下文;

public T Properties<T>()
    {
        return (T)Convert.ChangeType(properties_, typeof(T));
    }

    public T PropertiesNoValidate<T>()
    {
        return (T)Convert.ChangeType(propertiesNoValidate_, typeof(T));
    }

InvalidCastException：对象必须实现 IConvertible。System.Convert.ChangeType (System.Object value, System.Type conversionType, System.IFormatProvider provider) (at :0) System.Convert.ChangeType (System.Object value, System.Type conversionType) (at :0) RocketMod.Archi .BaseTool.Properties[T] () (at Assets/Rocket - Modeling Tools/Archi/Scripts/Editor/BaseTool.cs:224) RocketMod.Archi.PropertiesGUI.HasContents () (at Assets/Rocket - Modeling Tools/Archi/ Scripts/Editor/PropertiesGUI.cs:54) RocketMod.Archi.PropertiesGUI.OnGUI () (在 Assets/Rocket - 建模工具/Archi/Scripts/Editor/PropertiesGUI.cs:17) RocketMod.Archi.ToolSelectionGUI.OnGUI () (在 Assets/Rocket - 建模工具/Archi/Scripts/Editor/ToolSelectionGUI.cs:164) RocketMod.Archi.ArchiEditor.OnInspectorGUI () (在 Assets/Rocket - Modeling Tools/Archi/Scripts/Editor/ArchiEditor.cs:

如果要解决这个问题，我会写如下一切都停止工作；

public T Properties<T>() where T : IConvertible
    {
        return (T)Convert.ChangeType(properties_, typeof(T));
    }

    public T PropertiesNoValidate<T>() where T : IConvertible
    {
        return (T)Convert.ChangeType(propertiesNoValidate_, typeof(T));
    }

任何帮助将不胜感激！

标签： c#unity3d

解决方案

<T>您在返回特定类型属性的方法中使用泛型类型。

用这些方法替换您的方法的签名：

//     v----------------v--------------The type of properties_
public BaseToolProperties Properties()
{   //                              ^----------------the <T> was removed
    return properties_;
}

//     v--------------v----------------The type of propertiesNoValidate_
public ScriptableObject PropertiesNoValidate()
{   //                                      ^--------the <T> was removed
    return propertiesNoValidate_;
}

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