优化GaugeChart和RingChart的label初始化

Runtime/GaugeChart.cs

@@ -93,6 +93,7 @@ namespace XCharts
 
                 var serieLabel = serie.gaugeAxis.axisLabel;
                 serie.gaugeAxis.ClearLabelObject();
+                serie.UpdateCenter(chartWidth, chartHeight);
                 var count = serie.splitNumber > 36 ? 36 : (serie.splitNumber + 1);
                 var startAngle = serie.startAngle;
                 for (int j = 0; j < count; j++)
@@ -146,7 +147,6 @@ namespace XCharts
             DrawPointer(vh, serie, currAngle);
             TitleStyleHelper.CheckTitle(serie, ref m_ReinitTitle, ref m_UpdateTitleText);
             SerieLabelHelper.CheckLabel(serie, ref m_ReinitLabel, ref m_UpdateLabelText);
-
             CheckAnimation(serie);
             if (!serie.animation.IsFinish())
             {

Runtime/Internal/BaseChart.cs

@@ -370,6 +370,7 @@ namespace XCharts
             for (int i = 0; i < m_Series.Count; i++)
             {
                 var serie = m_Series.list[i];
+                serie.UpdateCenter(chartWidth, chartHeight);
                 for (int j = 0; j < serie.data.Count; j++)
                 {
                     var serieData = serie.data[j];

Runtime/RingChart.cs

@@ -182,6 +182,7 @@ namespace XCharts
                     serieData.labelPosition = serie.runtimeCenterPos + new Vector3(px2, py2);
                     break;
             }
+            serieData.SetLabelPosition(serieData.labelPosition);
         }
 
         private void DrawBackground(VertexHelper vh, Serie serie, SerieData serieData, int index, float insideRadius, float outsideRadius)