void BottomToolBar(Rect rect)
        {
            GUILayout.BeginArea(rect);
            using (new EditorGUILayout.VerticalScope())
            {
                using (new EditorGUILayout.HorizontalScope())
                {
                    var style = "miniButton";
                    if (GUILayout.Button("Expand Exported", style))
                    {
                        Reset();
                        m_TreeView.ExpandExported();
                    }
                    if (GUILayout.Button("Expand All", style))
                    {
                        Reset();
                        m_TreeView.ExpandAll();
                    }

                    if (GUILayout.Button("Collapse All", style))
                    {
                        Reset();
                        m_TreeView.CollapseAll();
                    }
                }
                EditorGUILayout.Space();
                using (new EditorGUILayout.HorizontalScope())
                {
                    var style = "miniButton";
                    if (GUILayout.Button("Uncheck All", style))
                    {
                        if (EditorUtility.DisplayDialog("警告", "所有文件夹导出AB包设置都将被清除,确定吗?", "确定", "取消"))
                        {
                            Reset();
                            m_TreeView.UnExportAll();
                        }
                    }
                    if (GUILayout.Button("Reset All", style))
                    {
                        if (EditorUtility.DisplayDialog("警告", "所有形式(自定义、文件夹)导出AB包设置都将被清除,确定吗?", "确定", "取消"))
                        {
                            string[] abNames = AssetDatabase.GetAllAssetBundleNames();
                            for (int i = 0; i < abNames.Length; i++)
                            {
                                AssetDatabase.RemoveAssetBundleName(abNames[i], true);
                            }
                            Reset();
                            m_TreeView.ReloadData();
                            AssetBundleBrowserMain.instance.FreshManageTab();
                        }
                    }

                    if (GUILayout.Button("Clear Custom", style))
                    {
                        if (EditorUtility.DisplayDialog("警告", "所有自定义的AB包设置都将被清除,确定吗?", "确定", "取消"))
                        {
                            Reset();
                            m_TreeView.ClearCustom();
                        }
                    }
                }
            }

            GUILayout.EndArea();
        }