[optimize][serie] optimize index of serieData

Runtime/Serie/Line/LineHandler.GridCoord.cs

@@ -57,6 +57,7 @@ namespace XCharts.Runtime
             m_LastCheckContextFlag = needCheck;
             var themeSymbolSize = chart.theme.serie.lineSymbolSize;
             var needInteract = false;
+            serie.ResetDataIndex();
             if (m_LegendEnter)
             {
                 serie.context.pointerEnter = true;
@@ -112,7 +113,9 @@ namespace XCharts.Runtime
                     }
                 }
                 if (lastIndex != serie.context.pointerItemDataIndex)
+                {
                     needInteract = true;
+                }
             }
             if (needInteract)
             {

Runtime/Serie/Serie.cs

@@ -1159,6 +1159,23 @@ namespace XCharts.Runtime
                 serieData.interact.Reset();
         }
 
+        /// <summary>
+        /// 重置数据项索引。避免部分数据项的索引异常。
+        /// </summary>
+        public bool ResetDataIndex()
+        {
+            var flag = false;
+            for (int i = 0; i < m_Data.Count; i++)
+            {
+                if (m_Data[i].index != i)
+                {
+                    m_Data[i].index = i;
+                    flag = true;
+                }
+            }
+            return flag;
+        }
+
         /// <summary>
         /// 清空所有数据
         /// </summary>