DropdownMenu.ClearItems

描述

清除菜单中的所有项。

using UnityEditor;
using UnityEngine;
using UnityEngine.UIElements;

public class ContextMenuWindow : EditorWindow
{
    [MenuItem("My/Context Menu Window")]
    static void ShowMe() => GetWindow<ContextMenuWindow>();

    void CreateGUI()
    {
        var contextMenuContainer = new VisualElement();
        contextMenuContainer.style.flexGrow = 1;
        contextMenuContainer.AddManipulator(new ContextualMenuManipulator(e =>
        {
            e.menu.AppendAction("My Action 1", a => Debug.Log("My Action 1 Works"), DropdownMenuAction.Status.Normal);
            e.menu.AppendAction("My Action 2", a => Debug.Log("My Action 2 Works"), DropdownMenuAction.Status.Normal);
            e.menu.ClearItems();
            e.menu.AppendAction("My Action 3", a => Debug.Log("My Action 3 Works"), DropdownMenuAction.Status.Normal);
        }));

        rootVisualElement.Add(contextMenuContainer);
    }
}