不影响Inspector布局拓展类

DecoratorEditor.cs

using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using UnityEditor;
using UnityEngine;

/// <summary>
/// A base class for creating editors that decorate Unity's built-in editor types.
/// </summary>
public abstract class DecoratorEditor : Editor
{
    // empty array for invoking methods using reflection
    private static readonly object[] EMPTY_ARRAY = new object[0];
    
    #region Editor Fields
    
    /// <summary>
    /// Type object for the internally used (decorated) editor.
    /// </summary>
    private System.Type decoratedEditorType;
    
    /// <summary>
    /// Type object for the object that is edited by this editor.
    /// </summary>
    private System.Type editedObjectType;
    
    private Editor editorInstance;
    
    #endregion
    
    private Dictionary<string, MethodInfo> decoratedMethods = new Dictionary<string, MethodInfo>();
    
    private static Assembly editorAssembly = Assembly.GetAssembly(typeof(Editor));
    
    protected Editor EditorInstance
    {
        get
        {
            if (editorInstance == null && targets != null && targets.Length > 0)
            {
                editorInstance = Editor.CreateEditor(targets, decoratedEditorType);
            }
            
            if (editorInstance == null)
            {
                Debug.LogError("Could not create editor !");
            }
            
            return editorInstance;
        }
    }
    
    public DecoratorEditor (string editorTypeName)
    {
        this.decoratedEditorType = editorAssembly.GetTypes().Where(t => t.Name == editorTypeName).FirstOrDefault();

        /*System.Type[] types = editorAssembly.GetTypes();
        for (int i=0; i<types.Length; i++)
        {
            string name=types[i].Name;
            if(name.IndexOf("Collider")>-1)Debug.Log(name);
        }*/

        Init ();
       
        // Check CustomEditor types.
        /*var originalEditedType = GetCustomEditorType(decoratedEditorType);
        Debug.Log(originalEditedType);
        if (originalEditedType != editedObjectType)
        {
            throw new System.ArgumentException(
                string.Format("Type {0} does not match the editor {1} type {2}", 
                          editedObjectType, editorTypeName, originalEditedType));
        }*/
    }
    
    private System.Type GetCustomEditorType(System.Type type)
    {
        var flags = BindingFlags.NonPublic  | BindingFlags.Instance;
        
        var attributes = type.GetCustomAttributes(typeof(CustomEditor), true) as CustomEditor[];
        var field = attributes.Select(editor => editor.GetType().GetField("m_InspectedType", flags)).First();
        
        return field.GetValue(attributes[0]) as System.Type;
    }
    
    private void Init()
    {     
        var flags = BindingFlags.NonPublic  | BindingFlags.Instance;
        
        var attributes = this.GetType().GetCustomAttributes(typeof(CustomEditor), true) as CustomEditor[];
        var field = attributes.Select(editor => editor.GetType().GetField("m_InspectedType", flags)).First();
        
        editedObjectType = field.GetValue(attributes[0]) as System.Type;
    }

    void OnDisable()
    {
        if (editorInstance != null)
        {
            DestroyImmediate(editorInstance);
        }
    }
    
    /// <summary>
    /// Delegates a method call with the given name to the decorated editor instance.
    /// </summary>
    protected void CallInspectorMethod(string methodName)
    {
        MethodInfo method = null;
        
        // Add MethodInfo to cache
        if (!decoratedMethods.ContainsKey(methodName))
        {
            var flags = BindingFlags.Instance | BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.Public;
            
            method = decoratedEditorType.GetMethod(methodName, flags);
            
            if (method != null)
            {
                decoratedMethods[methodName] = method;
            }
            else
            {
                Debug.LogError(string.Format("Could not find method {0}", method));
            }
        }
        else
        {
            method = decoratedMethods[methodName];
        }
        
        if (method != null)
        {
            method.Invoke(EditorInstance, EMPTY_ARRAY);
        }
    }
    
    public void OnSceneGUI()
    {
        CallInspectorMethod("OnSceneGUI");
    }
    
    protected override void OnHeaderGUI ()
    {
        CallInspectorMethod("OnHeaderGUI");
    }
    
    public override void OnInspectorGUI ()
    {
        EditorInstance.OnInspectorGUI();
    }
    
    public override void DrawPreview (Rect previewArea)
    {
        EditorInstance.DrawPreview (previewArea);
    }
    
    public override string GetInfoString ()
    {
        return EditorInstance.GetInfoString ();
    }
    
    public override GUIContent GetPreviewTitle ()
    {
        return EditorInstance.GetPreviewTitle();
    }
    
    public override bool HasPreviewGUI ()
    {
        return EditorInstance.HasPreviewGUI ();
    }
    
    public override void OnInteractivePreviewGUI (Rect r, GUIStyle background)
    {
        EditorInstance.OnInteractivePreviewGUI (r, background);
    }
    
    public override void OnPreviewGUI (Rect r, GUIStyle background)
    {
        EditorInstance.OnPreviewGUI (r, background);
    }
    
    public override void OnPreviewSettings ()
    {
        EditorInstance.OnPreviewSettings ();
    }

    //5.x才有以下方法
    /*public override void ReloadPreviewInstances ()
    {
        EditorInstance.ReloadPreviewInstances ();
    }*/
    
    public override Texture2D RenderStaticPreview (string assetPath, Object[] subAssets, int width, int height)
    {
        return EditorInstance.RenderStaticPreview (assetPath, subAssets, width, height);
    }
    
    public override bool RequiresConstantRepaint ()
    {
        return EditorInstance.RequiresConstantRepaint ();
    }
    
    public override bool UseDefaultMargins ()
    {
        return EditorInstance.UseDefaultMargins ();
    }
}