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Assets/Scripts/NBC/Asset/Editor/Utils/MultiColumnHeaderUtil.cs

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+using UnityEditor.IMGUI.Controls;
+
+namespace NBC.Asset.Editor
+{
+    public static class MultiColumnHeaderUtil
+    {
+        /// <summary>
+        /// 自动大小
+        /// </summary>
+        /// <param name="headerState"></param>
+        /// <param name="maxWidth">最大宽</param>
+        /// <param name="index">自由大小的序号</param>
+        public static void AutoWidth(this MultiColumnHeaderState headerState, float maxWidth, int index = 0)
+        {
+            var columns = headerState.columns;
+            if (columns == null) return;
+            var residue = maxWidth - 16;
+            for (int i = 0; i < columns.Length; i++)
+            {
+                var column = columns[i];
+                if (i != index)
+                {
+                    residue -= column.width;
+                }
+            }
+
+            if (residue < 100) residue = 100;
+            columns[index].width = residue;
+        }
+    }
+}