EditorWindow.saveChangesMessage

描述

如果提示用户保存，则显示的消息

在派生类中设置 saveChangesMessage 以防止用户意外丢失未保存的工作。为了使 saveChangesMessage 起作用，您必须将其与 EditorWindow.hasUnsavedChanges 一起使用，并覆盖 EditorWindow.SaveChanges 方法。此消息将按您编写的原样显示。此消息将显示给具有未保存更改的用户，如果他们尝试关闭具有此 EditorWindow 的窗口或选项卡。保存更改消息可能会与来自其他窗口的其他消息合并。如果有多个窗口具有未保存的更改，就会发生这种情况。

using UnityEngine;
using UnityEditor;
using UnityEngine.UIElements;

public class UnsavedChangesExampleWindow : EditorWindow
{
    [MenuItem("Examples/Editor Window With Unsaved Changes")]
    static void Init()
    {
        UnsavedChangesExampleWindow window = (UnsavedChangesExampleWindow)EditorWindow.GetWindowWithRect(typeof(UnsavedChangesExampleWindow), new Rect(100, 100, 400, 400));

        window.saveChangesMessage = "This window has unsaved changes. Would you like to save?";
        window.Show();
    }

    void CreateGUI()
    {
        var label = new Label();
        label.text = hasUnsavedChanges ? "I have changes!" : "No changes.";
        rootVisualElement.Add(label);

        var buttonCreate = new Button();
        buttonCreate.text = "Create unsaved changes";
        buttonCreate.clicked += () => {
            hasUnsavedChanges = true;
            Debug.Log($"{this} has unsaved changes!!!");
        };
        rootVisualElement.Add(buttonCreate);

        var buttonSave = new Button();
        buttonSave.text = "Save";
        buttonSave.clicked += () => SaveChanges();
        rootVisualElement.Add(buttonSave);

        var buttonDiscard = new Button();
        buttonDiscard.text = "Discard";
        buttonDiscard.clicked += () => DiscardChanges();
        rootVisualElement.Add(buttonDiscard);
    }

    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();
    }
}