为啥尝试在编辑器窗口中进行垂直滚动时出现异常 InvalidOperationException: Stack empty.?

Posted 2023-03-22

【中文标题】为啥尝试在编辑器窗口中进行垂直滚动时出现异常 InvalidOperationException: Stack empty.?

【英文标题】：Why when trying to make vertical scroll in editorwindow I'm getting exception InvalidOperationException: Stack empty.?为什么尝试在编辑器窗口中进行垂直滚动时出现异常 InvalidOperationException: Stack empty.?

【发布时间】：2019-10-02 18:45:49

【问题描述】：

我要做的是在将编辑器窗口扩展到底部时添加自动垂直滚动：

例如，如果在屏幕截图中这是原始编辑器窗口大小：

例如，当单击“对话”并将其折叠时，我想使用垂直滚动来制作它：

我可以用鼠标继续向下拉伸窗口，但在这种情况下我想使用滚动：

using System.Collections;
using System.Collections.Generic;
using UnityEditor;
using UnityEditorInternal;
using UnityEngine;

public class ConversationsEditorWindow : EditorWindow

    [MenuItem("Window/Editor Window Test")]
    static void Init()
    
        // Get existing open window or if none, make a new one:
        ConversationsEditorWindow window = (ConversationsEditorWindow)EditorWindow.GetWindow(typeof(ConversationsEditorWindow));
    

    void OnGUI()
    
        GameObject sel = Selection.activeGameObject;
        ConversationTrigger targetComp = sel.GetComponent<ConversationTrigger>();

        if (targetComp != null)
        
            EditorGUILayout.BeginVertical();
            var editor = Editor.CreateEditor(targetComp);
            var tar = editor.targets;
            editor.OnInspectorGUI();
            EditorGUILayout.EndScrollView();
            EditorGUILayout.EndVertical();
        
    

异常消息有点长： 例外情况在第 27 行：

EditorGUILayout.EndScrollView();

InvalidOperationException：堆栈为空。 System.Collections.Stack.Peek () (at :0) UnityEngine.GUI.EndScrollView (System.Boolean handleScrollWheel) (在 C:/buildslave/unity/build/Modules/IMGUI/GUI.cs:1481) UnityEngine.GUILayout.EndScrollView (System.Boolean handleScrollWheel) (在 C:/buildslave/unity/build/Modules/IMGUI/GUILayout.cs:387) unityEditor.EditorGUILayout.EndScrollView() (在 C:/buildslave/unity/build/Editor/Mono/EditorGUI.cs:9203) ConversationsEditorWindow.OnGUI () (在 Assets/Editor/ConversationsEditorWindow.cs:27) System.Reflection.MonoMethod.Invoke（System.Object obj，System.Reflection.BindingFlags invokeAttr，System.Reflection.Binder binder，System.Object[] 参数，System.Globalization.CultureInfo 文化）（在：0） Rethrow as TargetInvocationException：调用的目标已引发异常。 System.Reflection.MonoMethod.Invoke（System.Object obj，System.Reflection.BindingFlags invokeAttr，System.Reflection.Binder binder，System.Object[] 参数，System.Globalization.CultureInfo 文化）（在：0） System.Reflection.MethodBase.Invoke（System.Object obj，System.Object[] 参数）（在：0） UnityEditor.HostView.Invoke (System.String methodName, System.Object obj) (在 C:/buildslave/unity/build/Editor/Mono/HostView.cs:342) UnityEditor.HostView.Invoke (System.String methodName) (在 C:/buildslave/unity/build/Editor/Mono/HostView.cs:336) UnityEditor.HostView.InvokeOnGUI (UnityEngine.Rect onGUIPosition, UnityEngine.Rect viewRect) (在 C:/buildslave/unity/build/Editor/Mono/HostView.cs:310) UnityEditor.DockArea.DrawView (UnityEngine.Rect viewRect, UnityEngine.Rect dockAreaRect, System.Boolean customBorder, System.Boolean floatingWindow, System.Boolean isBottomTab) (在 C:/buildslave/unity/build/Editor/Mono/GUI/DockArea. cs:361) unityEditor.DockArea.OldOnGUI () (在 C:/buildslave/unity/build/Editor/Mono/GUI/DockArea.cs:320) UnityEngine.Experimental.UIElements.IMGUIContainer.DoOnGUI (UnityEngine.Event evt, UnityEngine.Matrix4x4 worldTransform, UnityEngine.Rect clippingRect, System.Boolean isComputingLayout) (在 C:/buildslave/unity/build/Modules/UIElements/IMGUIContainer.cs:244 ) UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

【参考方案1】：

堆栈空消息提供了一个线索 - 你正在调用：EditorGUILayout.EndScrollView(); （试图从 gui 堆栈中弹出）而不事先调用 BeginScrollView()。