支持预设

在编辑器脚本中，使用 ObjectFactory 类可创建新的游戏对象、组件和资源。创建这些项时，ObjectFactory 类自动使用默认预设。脚本不必搜索并应用默认预设，因为 ObjectFactory 会处理此问题。

支持新类型

要默认支持和启用预设，您的类必须继承自以下之一：

• UnityEngine.Monobehaviour
• UnityEngine.ScriptableObject
• UnityEngine.ScriptedImporter

Preset Inspector 会创建类的临时实例，便于用户修改其值，因此请确保您的类不会影响或依赖其他对象，如静态值、项目资源或场景实例。

提示：可选择是否使用 CustomEditor 属性。

用例示例：自定义编辑器窗口中的预设设置

使用可能使用预设的设置来设置自定义 EditorWindow 类时：

• 使用 ScriptableObject 来存储设置的副本。它也可以具有 CustomEditor 属性。预设系统会处理此对象。

• 始终使用此临时 ScriptableObject 检视面板 (Inspector) 在__ UI__（即用户界面，User Interface）让用户能够与您的应用程序进行交互。Unity 目前支持三种 UI 系统。更多信息
  See in Glossary 中显示预设设置。这样，您的用户在 EditorWindow 中和编辑保存的预设时会看到相同的 UI。

• 在__选择预设 (Select Preset)__ 窗口中选择预设时，显示预设 (Preset) 按钮并使用您自己的 PresetSelectorReceiver 实现使 EditorWindow 设置保持最新。

以下脚本示例演示了如何将预设设置添加到简单的 EditorWindow。

此脚本示例演示了一个 ScriptableObject 在自定义窗口中保存并显示设置（保存到名为 Editor/MyWindowSettings.cs 的文件）：

using UnityEngine;

// Temporary ScriptableObject used by the Preset system

public class MyWindowSettings : ScriptableObject
{
    [SerializeField]
    string m_SomeSettings;
    
    public void Init(MyEditorWindow window)
    {
        m_SomeSettings = window.someSettings;
    }
    
    public void ApplySettings(MyEditorWindow window)
    {
        window.someSettings = m_SomeSettings;
        window.Repaint();
    }
}

用于更新自定义窗口中使用的 ScriptableObject 的 PresetSelectorReceiver 的脚本示例（保存到名为 Editor/MySettingsReceiver.cs 的文件）：

using UnityEditor.Presets;

// PresetSelector receiver to update the EditorWindow with the selected values.

public class MySettingsReceiver : PresetSelectorReceiver
{
    Preset initialValues;
    MyWindowSettings currentSettings;
    MyEditorWindow currentWindow;
    
    public void Init(MyWindowSettings settings, MyEditorWindow window)
    {
        currentWindow = window;
        currentSettings = settings;
        initialValues = new Preset(currentSettings);
    }
    
    public override void OnSelectionChanged(Preset selection)
    {
        if (selection != null)
        {
            // Apply the selection to the temporary settings
            selection.ApplyTo(currentSettings);
        }
        else
        {
            // None have been selected. Apply the Initial values back to the temporary selection.
            initialValues.ApplyTo(currentSettings);
        }
        
        // Apply the new temporary settings to our manager instance
        currentSettings.ApplySettings(currentWindow);
    }
    
    public override void OnSelectionClosed(Preset selection)
    {
        // Call selection change one last time to make sure you have the last selection values.
        OnSelectionChanged(selection);
        // Destroy the receiver here, so you don't need to keep a reference to it.
        DestroyImmediate(this);
    }
}

使用临时 ScriptableObject Inspector 及其预设按钮显示自定义设置的 EditorWindow 的脚本示例（保存到名为 Editor/MyEditorWindow.cs 的文件）：

using UnityEngine;
using UnityEditor;
using UnityEditor.Presets;

public class MyEditorWindow : EditorWindow

{
    // get the Preset icon and a style to display it
    private static class Styles
    {
        public static GUIContent presetIcon = EditorGUIUtility.IconContent("Preset.Context");
        public static GUIStyle iconButton = new GUIStyle("IconButton");

    }

    Editor m_SettingsEditor;
    MyWindowSettings m_SerializedSettings;
    
    public string someSettings
    {
        get { return EditorPrefs.GetString("MyEditorWindow_SomeSettings"); }
        set { EditorPrefs.SetString("MyEditorWindow_SomeSettings", value); }
    }
   
    // Method to open the window
    [MenuItem("Window/MyEditorWindow")]
    static void OpenWindow()
    {
        GetWindow<MyEditorWindow>();
    }

    void OnEnable()
    {
        // Create your settings now and its associated Inspector
        // that allows to create only one custom Inspector for the settings in the window and the Preset.
        m_SerializedSettings = ScriptableObject.CreateInstance<MyWindowSettings>();
        m_SerializedSettings.Init(this);
        m_SerializedSettings.hideFlags = HideFlags.DontSave;
        m_SettingsEditor = Editor.CreateEditor(m_SerializedSettings);
        m_SettingsEditor.hideFlags = HideFlags.DontSave;
    }

    void OnDisable()
    {
        Object.DestroyImmediate(m_SerializedSettings);
        Object.DestroyImmediate(m_SettingsEditor);
    }

    void OnGUI()
    {
        EditorGUILayout.BeginHorizontal();
        EditorGUILayout.LabelField("My custom settings", EditorStyles.boldLabel);
        GUILayout.FlexibleSpace();
        // create the Preset button at the end of the "MyManager Settings" line.
        var buttonPosition = EditorGUILayout.GetControlRect(false, EditorGUIUtility.singleLineHeight, Styles.iconButton);

        if (EditorGUI.DropdownButton(buttonPosition, Styles.presetIcon, FocusType.Passive, Styles.iconButton))
        {
            // Create a receiver instance. This destroys itself when the window appears, so you don't need to keep a reference to it.
            var presetReceiver = ScriptableObject.CreateInstance<MySettingsReceiver>();
            presetReceiver.Init(m_SerializedSettings, this);
            // Show the PresetSelector modal window. The presetReceiver updates your data.
            PresetSelector.ShowSelector(m_SerializedSettings, null, true, presetReceiver);
        }
        EditorGUILayout.EndHorizontal();
        
        // Draw the settings default Inspector and catch any change made to it.
        EditorGUI.BeginChangeCheck();
        m_SettingsEditor.OnInspectorGUI();

        if (EditorGUI.EndChangeCheck())
        {
            // Apply changes made in the settings editor to our instance.
            m_SerializedSettings.ApplySettings(this);
        }
    }
}

2017–03–27 2018.1 中的新功能 NewIn20181