Editor

Description

从中派生自定义编辑器的基类。使用此类可为对象创建您自己的自定义检视面板和编辑器。

设想一个 MyPlayer 脚本，其中包含盔甲和伤害的变量，以及对枪支 GameObject 的引用。

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...
    }
}

Using a custom Editor, the apperance of the script in the Inspector can be changed.

您可以使用 CustomEditor 属性将编辑器附加到自定义组件。

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.Editor 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.Editor overwritten, any existing IMGUI implementation using Editor.OnInspectorGUI on the same Editor will be ignored.

Here's an example of a custom inspector using UIElements:

using UnityEditor;
using UnityEngine.UIElements;
using UnityEditor.UIElements;

// Custom Editor using SerializedProperties and UIElements.
// Automatic handling of multi-object editing, undo, and Prefab overrides.
[CustomEditor(typeof(MyPlayer))]
public class MyPlayerEditorUIE : 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 VisualElement CreateInspectorGUI()
    {
        // Create inspector container element.
        var inspector = new VisualElement();

        // Create custom element.
        var customLabel = new Label ("This is a custom inspector.");

        // Create field elements.
        var damageField = new PropertyField (damageProp, "Damage");
        var armorField = new PropertyField (armorProp, "Armor");
        var gunField = new PropertyField (gunProp, "Gun Object");

        // Add all elements to the container.
        inspector.Add (customLabel);
        inspector.Add (damageField);
        inspector.Add (armorField);
        inspector.Add (gunField);

        return inspector;
    }
}

Here's an example of a custom inspector using IMGUI and multi-selection:
Custom editor in the Inspector.

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 ();
    }
}

Alternatively, 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 ();
    }
}

Variables

Public Functions

Protected Functions

Static Functions

Messages

Events

Inherited members