我目前正在为Unity编辑器（自定义检查器和自定义窗口）制作一个系统，该系统将自动化并使我们正在制作游戏的艺术家更容易，但我已经碰到了一堵砖墙。
我正在尝试找到一种方法，通过编辑器Textfield输入和GUI按钮，将未知脚本动态添加到场景中的游戏对象。艺术家/程序员将在文本字段中键入脚本的名称，它将搜索并添加到游戏对象，但我不知道如何继续这样做，特别是因为gameObject.AddComponent()的某些功能从Unity 5.3开始被弃用
这是我试图做的事情：
public string scriptname;
GameObject obj = null;
scriptname = EditorGUILayout.TextField("Script name:", scriptname, GUILayout.MaxHeight(25));
if (GUILayout.Button("Attach script"))
{
//search for the script to check if it exists, using DirectoryInfo
DirectoryInfo dir = new DirectoryInfo(Application.dataPath);
FileInfo[] info = dir.GetFiles("*.*", SearchOption.AllDirectories);
foreach (FileInfo f in info) // cycles through all the files
{
if(f.Name == scriptname)
{
//attaches to the gameobject (NOT WORKING)
System.Type MyScriptType = System.Type.GetType(scriptname + ",Assembly-CSharp");
obj.AddComponent(MyScriptType);
}
}
}
（当然，这是一个总结版本，我从脚本的不同部分复制了相关的行）。
但它不起作用。有任何想法吗？
经过广泛的实验，我得到了这个。这也涵盖了所有Unity组件。只是让它成为一种让生活更轻松的延伸方法。
public static class ExtensionMethod
{
public static Component AddComponentExt(this GameObject obj, string scriptName)
{
Component cmpnt = null;
for (int i = 0; i < 10; i++)
{
//If call is null, make another call
cmpnt = _AddComponentExt(obj, scriptName, i);
//Exit if we are successful
if (cmpnt != null)
{
break;
}
}
//If still null then let user know an exception
if (cmpnt == null)
{
Debug.LogError("Failed to Add Component");
return null;
}
return cmpnt;
}
private static Component _AddComponentExt(GameObject obj, string className, int trials)
{
//Any script created by user(you)
const string userMadeScript = "Assembly-CSharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null";
//Any script/component that comes with Unity such as "Rigidbody"
const string builtInScript = "UnityEngine, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null";
//Any script/component that comes with Unity such as "Image"
const string builtInScriptUI = "UnityEngine.UI, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null";
//Any script/component that comes with Unity such as "Networking"
const string builtInScriptNetwork = "UnityEngine.Networking, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null";
//Any script/component that comes with Unity such as "AnalyticsTracker"
const string builtInScriptAnalytics = "UnityEngine.Analytics, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null";
//Any script/component that comes with Unity such as "AnalyticsTracker"
const string builtInScriptHoloLens = "UnityEngine.HoloLens, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null";
Assembly asm = null;
try
{
//Decide if to get user script or built-in component
switch (trials)
{
case 0:
asm = Assembly.Load(userMadeScript);
break;
case 1:
//Get UnityEngine.Component Typical component format
className = "UnityEngine." + className;
asm = Assembly.Load(builtInScript);
break;
case 2:
//Get UnityEngine.Component UI format
className = "UnityEngine.UI." + className;
asm = Assembly.Load(builtInScriptUI);
break;
case 3:
//Get UnityEngine.Component Video format
className = "UnityEngine.Video." + className;
asm = Assembly.Load(builtInScript);
break;
case 4:
//Get UnityEngine.Component Networking format
className = "UnityEngine.Networking." + className;
asm = Assembly.Load(builtInScriptNetwork);
break;
case 5:
//Get UnityEngine.Component Analytics format
className = "UnityEngine.Analytics." + className;
asm = Assembly.Load(builtInScriptAnalytics);
break;
case 6:
//Get UnityEngine.Component EventSystems format
className = "UnityEngine.EventSystems." + className;
asm = Assembly.Load(builtInScriptUI);
break;
case 7:
//Get UnityEngine.Component Audio format
className = "UnityEngine.Audio." + className;
asm = Assembly.Load(builtInScriptHoloLens);
break;
case 8:
//Get UnityEngine.Component SpatialMapping format
className = "UnityEngine.VR.WSA." + className;
asm = Assembly.Load(builtInScriptHoloLens);
break;
case 9:
//Get UnityEngine.Component AI format
className = "UnityEngine.AI." + className;
asm = Assembly.Load(builtInScript);
break;
}
}
catch (Exception e)
{
//Debug.Log("Failed to Load Assembly" + e.Message);
}
//Return if Assembly is null
if (asm == null)
{
return null;
}
//Get type then return if it is null
Type type = asm.GetType(className);
if (type == null)
return null;
//Finally Add component since nothing is null
Component cmpnt = obj.AddComponent(type);
return cmpnt;
}
}
用法：
gameObject.AddComponentExt("YourScriptOrComponentName");
了解我是如何做到这一点非常重要，这样您就可以在任何未来的Unity更新中添加对新组件的支持。
对于用户创建的任何脚本：
1.找出需要的是什么？在Assembly.Load功能。
Assembly asm = Assembly.Load("???");
你可以把它放在你的脚本中：
Debug.Log("Info: " + this.GetType().Assembly);
我得到了：Assembly-CSharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null
我们现在应该取代???接着就，随即。
Assembly asm = Assembly.Load("Assembly-CSharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null");
2.找出需要的是什么？在asm.GetType功能。
Assembly asm = Assembly.Load("Assembly-CSharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null");
Type type = asm.GetType(???);
在这种情况下，它只是您要添加到GameObject的脚本的名称。
假设你的脚本名称是NathanScript：
Assembly asm = Assembly.Load("Assembly-CSharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null");
Type type = asm.GetType("NathanScript");
gameObject.AddComponent(type);
对于不是由用户创建的脚本/组件脚本构建的Unity：
这方面的例子是Rigidbody，Linerenderer，Image组件。只是用户不创建的任何组件。
1.找出需要的是什么？在Assembly.Load功能。
Assembly asm = Assembly.Load("???");
你可以把它放在你的脚本中：
ParticleSystem pt = gameObject.AddComponent<ParticleSystem>();
Debug.Log("Info11: " + pt.GetType().Assembly);
我得到了：UnityEngine, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null
我们现在应该取代???接着就，随即。
Assembly asm = Assembly.Load("UnityEngine, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null");
2.找出需要的是什么？在asm.GetType功能。
Assembly asm = Assembly.Load("UnityEngine, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null");
Type type = asm.GetType(???);
你可以把它放在你的脚本中：
ParticleSystem pt = gameObject.AddComponent<ParticleSystem>();
Debug.Log("Info: " + pt.GetType());
我得到了：UnityEngine.ParticleSystem
请记住，ParticleSystem在这里用作示例。因此，将转到asm.GetType函数的最终字符串将按如下方式计算：
string typeString = "UnityEngine." + componentName;
假设您要添加的组件是LineRenderer：
Assembly asm = Assembly.Load("UnityEngine, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null");
string typeString = "UnityEngine." + "LineRenderer";
Type type = asm.GetType(typeString);
gameObject.AddComponent(type);
将它放在一个扩展方法中：
如您所见，添加您创建的脚本以及Unity附带的脚本/组件需要完全不同的过程。你可以通过检查类型是否null来解决这个问题。如果类型是null，请执行另一步。如果另一步也是null那么脚本就不会退出。
我建议这样做：
if(GUILayout.Button("Attach script"))
{
// check if type is contained in your assembly:
Type type = typeof(MeAssemblyType).Assembly.GetTypes().FirstOrDefault(t => t.Name == scriptname);
if(type != null)
{
// script exists in the same assembly that MeAssemblyType is
obj.AddComponent(type); // add the component
}
else
{
// display some error message
}
}
当然，如果你使用一些包含其他组件的插件（依赖项），这将失败但是为了解决这个问题，你可以检查你的程序集的依赖关系：
typeof(MeAssemblyType) // your type from Assembly-CSharp
.Assembly // Assembly-CSharp assembly
.GetReferencedAssemblies() // get referenced assemblies
.FirstOrDefault(m =>
m.Assembly // from this assembly
.GetTypes() // get all types
.FirstOrDefault(t =>
t.Name == scriptname // select first one that matches the name
)
)
备注：
GetReferencedAssemblies方法只返回程序集“使用”（加载）的程序集。为了使它更清楚，假设您正在引用这些程序集：
而这段代码：
static void Main()
{
XmlDocument doc = new XmlDocument();
doc.LoadXml(<some_xml_input>);
}
然后GetReferencedAssemblies的输出看起来有点像：
>>> System.Xml, Version=<version>, Culture=neutral, PublicKeyToken=<key>
这意味着它不会加载NewtonsoftJson，因为它没有在该程序集内部使用。
更好的建议：
我建议你混合@Programmer回答的方法但不加载程序集，因为当Unity的编辑器从你的项目开始时它们已经被加载了。而是使用GetReferencedAssemblies方法，从那里你应该调用GetTypes方法来检索该程序集中的所有可能的类型。 （它会很慢，但会保证你想要的结果）之后你可以使用FirstOrDefault或者自己迭代Type[]找到你想要的那个。
这仍然是可能的。用这个
UnityEngineInternal.APIUpdaterRuntimeServices.AddComponent(GameObject go, "", string componentName);
希望有所帮助
反编译Unity的AddComponentWindow。了解如何完成。不要重新发明轮子。你很懒，看到链接
然后调用这样的窗口：
ws.winx.editor.windows.AddComponentWindow.Show(rect);
ws.winx.editor.windows.AddComponentWindow.OnClose += OnCloseComponentSelectedFromPopUpMenu;
ws.winx.editor.windows.AddComponentWindow.ComponentSelected += (menuPath) => ComponentSelectedFromPopUpMenu(positionData.Item1, menuPath);
处理返回（棘手的部分，再次从聪明的Unity同性恋中学习）
private void ComponentSelectedFromPopUpMenu(Vector2 position, string menuPath) {
MonoScript monoScript;
char[] kPathSepChars = new char[]
{
'/',
'\\'
};
menuPath = menuPath.Replace(" ", "");
string[] pathElements = menuPath.Split(kPathSepChars);
string fileName = pathElements[pathElements.Length - 1].Replace(".cs", "");
if (pathElements[0] == "Assets") {
Debug.LogWarning("Unity need to compile new added file so can be included");
} else if (pathElements.Length == 2) {
//use fileName
//do something
} else if (pathElements[1] == "Scripts") {//Component/Scripts/MyScript.cs
string[] guids = AssetDatabase.FindAssets("t:Script " + fileName.Replace(".cs", ""));
if (guids.Length > 0) {
for (int i = 0; i < guids.Length; i++) {
monoScript = AssetDatabase.LoadAssetAtPath(AssetDatabase.GUIDToAssetPath(guids[i]), typeof(MonoScript)) as MonoScript;
Type typet = monoScript.GetClass();
if (typet == null) continue;
} else {//Component/Physics/Rigidbody
//try to find by type, cos probably Unity type
Type unityType = ReflectionUtility.GetType("UnityEngine." + fileName);
if (unityType != null) {
//do something
return;
}
//Based on attribute [AddComponentMenu("Logic/MyComponent")]
//Component/Logics/MyComponent
string[] guids = AssetDatabase.FindAssets("t:Script " + fileName.Replace(".cs", ""));
if (guids.Length > 0) {
for (int i = 0; i < guids.Length; i++) {
monoScript = AssetDatabase.LoadAssetAtPath(AssetDatabase.GUIDToAssetPath(guids[i]), typeof(MonoScript)) as MonoScript;
Type typet = monoScript.GetClass();
if (typet == null) continue;
object[] addComponentMenuAttributes = typet.GetCustomAttributes(typeof(AddComponentMenu), true);
if (addComponentMenuAttributes != null && addComponentMenuAttributes.Length > 0 && "Component/" + ((AddComponentMenu)addComponentMenuAttributes[0]).componentMenu == menuPath)
{
//do somethings
}
}
}
}
}