68 lines
1.8 KiB
C#
68 lines
1.8 KiB
C#
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using System;
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using System.Collections.Generic;
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using UnityEditor;
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using UnityEngine;
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/// <summary>
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/// 在多 SceneView 窗口下安全地添加/移除临时回调。
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/// 原理：Templist 存放需在下一帧执行的回调，OnSceneGUI 将会把 Templist 转移到 list 来执行。
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/// </summary>
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public class UXCustomSceneView
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{
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static private List<Action<SceneView>> list = new List<Action<SceneView>>();
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static private List<Action<SceneView>> Templist = new List<Action<SceneView>>();
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[InitializeOnLoadMethod]
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static void Init()
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{
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list.Clear();
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Templist.Clear();
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SceneView.duringSceneGui -= OnSceneGUI;
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SceneView.duringSceneGui += OnSceneGUI;
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}
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static public void AddDelegate(Action<SceneView> method)
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{
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if (method == null) return;
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// 去重
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if (!Templist.Contains(method))
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Templist.Add(method);
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}
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static public void RemoveDelegate(Action<SceneView> method)
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{
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if (method == null) return;
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var idx = Templist.FindIndex(i => i == method);
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if (idx >= 0) Templist.RemoveAt(idx);
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}
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static public void OnSceneGUI(SceneView sceneView)
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{
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// 执行上一帧注册的 list
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foreach (Action<SceneView> method in list)
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{
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try
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{
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method.Invoke(sceneView);
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}
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catch (Exception e)
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{
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Debug.LogException(e);
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}
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}
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list.Clear();
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// 将 Templist 拷贝到 list，并在下一帧执行，这样可以避免在枚举时修改集合的问题
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foreach (Action<SceneView> method in Templist)
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{
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if (!list.Contains(method))
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list.Add(method);
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}
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}
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static public void ClearDelegate()
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{
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Templist.Clear();
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}
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}
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