Version: 2020.2


class in UnityEditor





Derive from this base class to create a custom inspector or editor for your custom object.

using UnityEngine;
using System.Collections;

// This is not an editor script. public class MyPlayer : MonoBehaviour { public int armor = 75; public int damage = 25; public GameObject gun;

void Update() { // Update logic here... } }

For example, use a custom editor to change the appearance of the script in the Inspector.

エディターをカスタムのコンポーネントにアタッチするために CustomEditor 属性を使用できます。

There are multiple ways to design custom Editors. If you want the Editor to support multi-object editing, you can use the CanEditMultipleObjects attribute. Instead of modifying script variables directly, it's advantageous to use the SerializedObject and SerializedProperty system to edit them, since this automatically handles multi-object editing, undo, and Prefab overrides. If this approach is used a user can select multiple assets in the hierarchy window and change the values for all of them at once.

You can either use UIElements to build your custom UI or you can use IMGUI. To create a custom inspector using UIElements, you have to override the Editor.CreateInspectorGUI on the Editor class. To create a custom inspector using IMGUI, you have to override the Editor.OnInspectorGUI on the Editor class. If you use UIElements and have Editor.CreateInspectorGUI overwritten, any existing IMGUI implementation using Editor.OnInspectorGUI on the same Editor will be ignored.

Here's an example of a custom inspector:

Custom editor in the Inspector.

using UnityEditor;
using UnityEditor.UIElements;
using UnityEngine;
using UnityEngine.UIElements;
public class MyPlayerEditor : Editor
    const string resourceFilename = "custom-editor-uie";
    public override VisualElement CreateInspectorGUI()
        VisualElement customInspector = new VisualElement();
        var visualTree = Resources.Load(resourceFilename) as VisualTreeAsset;
        customInspector.styleSheets.Add(Resources.Load($"{resourceFilename}-style") as StyleSheet);
        return customInspector;

The following example defines the layout of a custom inspector in uxml. The definition loads as a resource and the VisualTreeAsset.CloneTree method puts the hierarchy in a VisualElement object.

The InspectorWindow will instantiate an InspectorElement containing the custom inspector. The InspectorElement will call Bind on the custom inspector binding it to the MyPlayer object.

<UXML xmlns="UnityEngine.UIElements" xmlns:e="UnityEditor.UIElements">
    <VisualElement class="player-property">
        <VisualElement class="slider-row">
            <Label class="player-property-label" text="Damage"/>
            <VisualElement class="input-container">
                <SliderInt class="player-slider" name="damage-slider" high-value="100" direction="Horizontal" binding-path="damage"/>
                <e:IntegerField class="player-int-field" binding-path="damage"/>
        <e:ProgressBar class="player-property-progress-bar" name="damage-progress" binding-path="damage" title="Damage"/>

<VisualElement class="player-property"> <VisualElement class="slider-row"> <Label class="player-property-label" text="Armor"/> <VisualElement class="input-container"> <SliderInt class="player-slider" name="armor-slider" high-value="100" direction="Horizontal" binding-path="armor"/> <e:IntegerField class="player-int-field" binding-path="armor"/> </VisualElement> </VisualElement> <e:ProgressBar class="player-property-progress-bar" name="armor-progress" binding-path="armor" title="Armor"/> </VisualElement>

<e:PropertyField class="gun-field" binding-path="gun" label="Gun Object"/> </UXML>

UIElements automatically updates the UI when data changes and vice-versa. To bind data and automatically update data and UI, set values for the "binding-path" attributes.

Styling of the inspector is done in uss.

.slider-row {
    flex-direction: row;
    justify-content: space-between;
    margin-top: 4px;
.input-container {
    flex-direction: row;
    flex-grow: .6;
    margin-right: 4px;
.player-property {
    margin-bottom: 4px;
.player-property-label {
    margin-left: 16;
.player-slider {
    margin-right: 4px;
.player-property-progress-bar {
    margin-left: 16px;
    margin-right: 4px;
.player-int-field {
    min-width: 48px;
.gun-field {
    justify-content: space-between;
    margin-left: 16px;
    margin-right: 4px;
    margin-top: 6px;
    flex-grow: .6;

Here's an example of a custom inspector using IMGUI and multi-selection:

using UnityEditor;
using UnityEngine;
using System.Collections;

// Custom Editor using SerializedProperties. // Automatic handling of multi-object editing, undo, and Prefab overrides. [CustomEditor(typeof(MyPlayer))] [CanEditMultipleObjects] public class MyPlayerEditor : Editor { SerializedProperty damageProp; SerializedProperty armorProp; SerializedProperty gunProp;

void OnEnable() { // Setup the SerializedProperties. damageProp = serializedObject.FindProperty ("damage"); armorProp = serializedObject.FindProperty ("armor"); gunProp = serializedObject.FindProperty ("gun"); }

public override void OnInspectorGUI() { // Update the serializedProperty - always do this in the beginning of OnInspectorGUI. serializedObject.Update ();

// Show the custom GUI controls. EditorGUILayout.IntSlider (damageProp, 0, 100, new GUIContent ("Damage"));

// Only show the damage progress bar if all the objects have the same damage value: if (!damageProp.hasMultipleDifferentValues) ProgressBar (damageProp.intValue / 100.0f, "Damage");

EditorGUILayout.IntSlider (armorProp, 0, 100, new GUIContent ("Armor"));

// Only show the armor progress bar if all the objects have the same armor value: if (!armorProp.hasMultipleDifferentValues) ProgressBar (armorProp.intValue / 100.0f, "Armor");

EditorGUILayout.PropertyField (gunProp, new GUIContent ("Gun Object"));

// Apply changes to the serializedProperty - always do this in the end of OnInspectorGUI. serializedObject.ApplyModifiedProperties (); }

// Custom GUILayout progress bar. void ProgressBar (float value, string label) { // Get a rect for the progress bar using the same margins as a textfield: Rect rect = GUILayoutUtility.GetRect (18, 18, "TextField"); EditorGUI.ProgressBar (rect, value, label); EditorGUILayout.Space (); } }

If automatic handling of multi-object editing, undo, and Prefab overrides is not needed, the script variables can be modified directly by the editor without using the SerializedObject and SerializedProperty system, as in the IMGUI example below.

using UnityEditor;
using UnityEngine;
using System.Collections;

// Example script with properties. public class MyPlayerAlternative : MonoBehaviour { public int damage; public int armor; public GameObject gun;

// ...other code... }

// Custom Editor the "old" way by modifying the script variables directly. // No handling of multi-object editing, undo, and Prefab overrides! [CustomEditor (typeof(MyPlayerAlternative))] public class MyPlayerEditorAlternative : Editor {

public override void OnInspectorGUI() { MyPlayerAlternative mp = (MyPlayerAlternative)target;

mp.damage = EditorGUILayout.IntSlider ("Damage", mp.damage, 0, 100); ProgressBar (mp.damage / 100.0f, "Damage");

mp.armor = EditorGUILayout.IntSlider ("Armor", mp.armor, 0, 100); ProgressBar (mp.armor / 100.0f, "Armor");

bool allowSceneObjects = !EditorUtility.IsPersistent (target); mp.gun = (GameObject)EditorGUILayout.ObjectField ("Gun Object", mp.gun, typeof(GameObject), allowSceneObjects); }

// Custom GUILayout progress bar. void ProgressBar (float value, string label) { // Get a rect for the progress bar using the same margins as a textfield: Rect rect = GUILayoutUtility.GetRect (18, 18, "TextField"); EditorGUI.ProgressBar (rect, value, label); EditorGUILayout.Space (); } }


serializedObjectobject や objects の SerializedObject

Public 関数

CreateInspectorGUIImplement this method to make a custom UIElements inspector.
DrawDefaultInspectorDraws the built-in inspector.
DrawHeaderEditor のヘッダーを描画するためにはこの関数を呼び出します。
HasPreviewGUI OnPreviewGUI を実装する場合は、サブクラスでこのメソッドをオーバーライドします。
OnPreviewGUIImplement to create your own custom preview for the preview area of the inspector, the headers of the primary editor, and the object selector.
RenderStaticPreviewOverride this method if you want to render a static preview.
RepaintRedraw any inspectors that shows this editor.
RequiresConstantRepaintChecks if this editor requires constant repaints in its current state.
UseDefaultMarginsデフォルトのマージンを取らせたくない場合、Editor を継承したクラスでメソッドをオーバーライドし、false を返すようにします

Protected 関数

ShouldHideOpenButtonReturns the visibility setting of the "open" button in the Inspector.

Static 関数

CreateCachedEditorOn return previousEditor is an editor for targetObject or targetObjects. The function either returns if the editor is already tracking the objects, or destroys the previous editor and creates a new one.
CreateCachedEditorWithContextCreates a cached editor using a context object.
CreateEditor targetObject や複数の targetObjects のためのカスタムエディターを作成します。
CreateEditorWithContextMake a custom editor for targetObject or targetObjects with a context object.
DrawFoldoutInspectorDraws the inspector GUI with a foldout header for target.


HasFrameBoundsValidates whether custom bounds can be calculated for this editor.
OnGetFrameBoundsGets custom bounds for the target of this editor.
OnSceneGUIEnables the Editor to handle an event in the Scene view.


finishedDefaultHeaderGUIAn event raised while drawing the header of the Inspector window, after the default header items have been drawn.



hideFlagsShould the object be hidden, saved with the Scene or modifiable by the user?

Public 関数

GetInstanceIDオブジェクトのインスタンス ID を返します
ToStringReturns the name of the object.

Static 関数

DestroyRemoves a GameObject, component or asset.
DestroyImmediateDestroys the object obj immediately. You are strongly recommended to use Destroy instead.
DontDestroyOnLoadDo not destroy the target Object when loading a new Scene.
FindObjectOfTypeタイプ type から最初に見つけたアクティブのオブジェクトを返します
FindObjectsOfTypeGets a list of all loaded objects of Type type.
Instantiateoriginal のオブジェクトをクローンします
CreateInstanceScriptableObject のインスタンスを作成します。


operator !=二つのオブジェクトが異なるオブジェクトを参照しているか比較します
operator ==2つのオブジェクト参照が同じオブジェクトを参照しているか比較します。


Awake ScriptableObject スクリプトを開始するとき、この関数は呼び出されます。
OnDestroyScriptableObject が破棄されるとき、この関数は呼び出されます。
OnDisableScriptableObject クラスのオブジェクトがスコープを外れるとき、この関数は呼び出されます。
OnValidateThis function is called when the script is loaded or a value is changed in the Inspector (Called in the editor only).