Editor.hasUnsavedChanges

描述

此属性指定在检查器重建之前，编辑器是否提示用户保存或放弃未保存的更改。

将 hasUnsavedChanges 设置为 true 以提示用户保存或放弃未保存的更改。这有助于防止他们意外丢失未保存的工作。当您使用 hasUnsavedChanges 时，您还必须使用 EditorWindow.saveChangesMessage，并覆盖 EditorWindow.SaveChanges 和/或 EditorWindow.DiscardChanges 方法。当启用 hasUnsavedChanges 时，标题栏和停靠选项卡会更新以指示用户需要保存其工作。如果用户在未保存的情况下关闭 InspectorWindow、更改选择或进入播放模式，则会出现消息框，并提示他们保存、放弃更改或取消。

using UnityEngine;
using UnityEditor;

[CreateAssetMenu]
public class UnsavedChangesExampleSO : ScriptableObject
{}

[CustomEditor(typeof(UnsavedChangesExampleSO))]
public class UnsavedChangesExampleEditor : UnityEditor.Editor
{
    void OnEnable()
    {
        saveChangesMessage = "This editor has unsaved changes. Would you like to save?";
    }

    void OnInspectorGUI()
    {
        saveChangesMessage = EditorGUILayout.TextField(saveChangesMessage);

        EditorGUILayout.LabelField(hasUnsavedChanges ? "I have changes!" : "No changes.", EditorStyles.wordWrappedLabel);
        EditorGUILayout.LabelField("Try to change selection.");

        using (new EditorGUI.DisabledScope(hasUnsavedChanges))
        {
            if (GUILayout.Button("Create unsaved changes"))
                hasUnsavedChanges = true;
        }

        using (new EditorGUI.DisabledScope(!hasUnsavedChanges))
        {
            if (GUILayout.Button("Save"))
                SaveChanges();

            if (GUILayout.Button("Discard"))
                DiscardChanges();
        }
    }

    public override void SaveChanges()
    {
        // Your custom save procedures here

        Debug.Log($"{this} saved successfully!!!");
        base.SaveChanges();
    }

    public override void DiscardChanges()
    {
        // Your custom procedures to discard changes

        Debug.Log($"{this} discarded changes!!!");
        base.DiscardChanges();
    }
}