优化SerieLabel引起的性能问题

Runtime/Component/Sub/SerieData.cs

@@ -202,7 +202,8 @@ namespace XCharts
                 labelText.text = text;
                 if (m_LabelAutoSize)
                 {
-                    var newSize = new Vector2(labelText.preferredWidth + m_LabelPaddingLeftRight * 2,
+                    var newSize = string.IsNullOrEmpty(text) ? Vector2.zero :
+                        new Vector2(labelText.preferredWidth + m_LabelPaddingLeftRight * 2,
                                         labelText.preferredHeight + m_LabelPaddingTopBottom * 2);
                     var sizeChange = newSize.x != labelRect.sizeDelta.x || newSize.y != labelRect.sizeDelta.y;
                     if (sizeChange) labelRect.sizeDelta = newSize;

Runtime/Internal/BaseChart.cs

@@ -289,7 +289,8 @@ namespace XCharts
         {
             var labelObject = ChartHelper.AddObject(s_SerieLabelObjectName, transform, chartAnchorMin,
                 chartAnchorMax, chartPivot, new Vector2(chartWidth, chartHeight));
-            ChartHelper.DestroyAllChildren(labelObject.transform);
+            //ChartHelper.DestroyAllChildren(labelObject.transform);
+            SerieLabelPool.ReleaseAll(labelObject.transform);
             int count = 0;
             for (int i = 0; i < m_Series.Count; i++)
             {
@@ -297,8 +298,8 @@ namespace XCharts
                 for (int j = 0; j < serie.data.Count; j++)
                 {
                     var serieData = serie.data[j];
-                    if (!serie.label.show  && j > 100) continue;
+                    if (!serie.label.show && j > 100) continue;
-                    var textName = s_SerieLabelObjectName + "_" + i + "_" + j + "_" + serieData.name;
+                    var textName = ChartCached.GetSerieLabelName(s_SerieLabelObjectName, i, j);
                     var color = Color.grey;
                     if (serie.type == SerieType.Pie)
                     {
@@ -310,12 +311,8 @@ namespace XCharts
                         color = serie.label.color != Color.clear ? serie.label.color :
                             (Color)m_ThemeInfo.GetColor(i);
                     }
-                    var backgroundColor = serie.label.backgroundColor;
+                    var labelObj = SerieLabelPool.Get(textName, labelObject.transform, serie.label, m_ThemeInfo.font, color, serieData);
-                    var labelObj = ChartHelper.AddSerieLabel(textName, labelObject.transform, m_ThemeInfo.font,
+                    var iconObj = labelObj.transform.Find("Icon").gameObject;
-                        color, backgroundColor, serie.label.fontSize, serie.label.fontStyle, serie.label.rotate,
-                        serie.label.backgroundWidth, serie.label.backgroundHeight);
-
-                    var iconObj = ChartHelper.AddIcon("Icon", labelObj.transform, serieData.iconWidth, serieData.iconHeight);
                     serieData.SetIconObj(iconObj);
 
                     var isAutoSize = serie.label.backgroundWidth == 0 || serie.label.backgroundHeight == 0;
@@ -328,6 +325,7 @@ namespace XCharts
             }
         }
 
+
         private void InitTooltip()
         {
             var tooltipObject = ChartHelper.AddObject("tooltip", transform, chartAnchorMin,

Runtime/Internal/SerieLabelPool.cs

@@ -0,0 +1,59 @@
+/******************************************/
+/*                                        */
+/*     Copyright (c) 2018 monitor1394     */
+/*     https://github.com/monitor1394     */
+/*                                        */
+/******************************************/
+
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace XCharts
+{
+    internal static class SerieLabelPool
+    {
+        private static readonly Stack<GameObject> m_Stack = new Stack<GameObject>(200);
+
+        public static GameObject Get(string name, Transform parent, SerieLabel label, Font font, Color color, SerieData serieData)
+        {
+            GameObject element;
+            if (m_Stack.Count == 0)
+            {
+                element = ChartHelper.AddSerieLabel(name, parent, font,
+                        color, label.backgroundColor, label.fontSize, label.fontStyle, label.rotate,
+                        label.backgroundWidth, label.backgroundHeight);
+                ChartHelper.AddIcon("Icon", element.transform, serieData.iconWidth, serieData.iconHeight);
+            }
+            else
+            {
+                element = m_Stack.Pop();
+                element.name = name;
+                element.transform.SetParent(parent);
+                ChartHelper.SetActive(element, true);
+            }
+            return element;
+        }
+
+        public static void Release(GameObject element)
+        {
+            ChartHelper.SetActive(element, false);
+            //if (m_Stack.Count > 0 && ReferenceEquals(m_Stack.Peek(), element))
+            //    Debug.LogError("Internal error. Trying to destroy object that is already released to pool." + element.name);
+            m_Stack.Push(element);
+        }
+
+        public static void ReleaseAll(Transform parent)
+        {
+            int count = parent.childCount;
+            for (int i = 0; i < count; i++)
+            {
+                Release(parent.GetChild(i).gameObject);
+            }
+        }
+
+        public static void ClearAll()
+        {
+            m_Stack.Clear();
+        }
+    }
+}

Runtime/Internal/SerieLabelPool.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 340f267fa46e74d0bbbb0b75a20bd708
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/Utility/ChartCached.cs

@@ -23,6 +23,10 @@ namespace XCharts
         private static Dictionary<int, string> s_IntToStr = new Dictionary<int, string>(1000);
         private static Dictionary<int, string> s_IntToFn = new Dictionary<int, string>(20);
         private static Dictionary<Color, string> s_ColorToStr = new Dictionary<Color, string>(1000);
+        private static Dictionary<int, string> s_SerieLabelName = new Dictionary<int, string>(1000);
+        private static Dictionary<int, string> s_AxisLabelName = new Dictionary<int, string>(1000);
+
+
 
         public static string FloatToStr(float value, int f = 0, bool forceE = false)
         {
@@ -83,5 +87,35 @@ namespace XCharts
                 return s_ColorToStr[color];
             }
         }
+
+        internal static string GetSerieLabelName(string prefix, int i, int j)
+        {
+            int key = i * 10000000 + j;
+            if (s_SerieLabelName.ContainsKey(key))
+            {
+                return s_SerieLabelName[key];
+            }
+            else
+            {
+                string name = prefix + "_" + i + "_" + j;
+                s_SerieLabelName[key] = name;
+                return name;
+            }
+        }
+
+        internal static string GetAxisLabelName(string prefix, bool isYAxis,int axisIndex, int i)
+        {
+            int key = (isYAxis?2:1) * 1000000 + (axisIndex+1) * 100000 + i;
+            if (s_AxisLabelName.ContainsKey(key))
+            {
+                return s_AxisLabelName[key];
+            }
+            else
+            {
+                string name = prefix + "_" + axisIndex + "_" + i;
+                s_AxisLabelName[key] = name;
+                return name;
+            }
+        }
     }
 }

Runtime/Utility/XChartsMgr.cs

@@ -65,6 +65,10 @@ namespace XCharts
 
         private XChartsMgr() { }
 
+        private void Awake()
+        {
+            SerieLabelPool.ClearAll();
+        }
 
         public string changeLog { get; private set; }
         public string newVersion { get { return m_NewVersion; } }