From ae9cc37592841ade4a7e2b61a3f8edfdb67de039 Mon Sep 17 00:00:00 2001
From: monitor1394 <monitor1394@gmail.com>
Date: Fri, 3 Dec 2021 08:38:00 +0800
Subject: [PATCH] Fixed axis boundaryGap display error #174

---
 CHANGELOG-EN.md              |  3 ++-
 CHANGELOG.md                 |  1 +
 Runtime/Helper/AxisHelper.cs | 12 ++++++++----
 3 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/CHANGELOG-EN.md b/CHANGELOG-EN.md
index d82b52d5..31e7aa6a 100644
--- a/CHANGELOG-EN.md
+++ b/CHANGELOG-EN.md
@@ -41,7 +41,8 @@
 
 ## branch-2.0
 
-* (2021.11.30) Fixed serie ignore display error #173
+* (2021.12.03) Fixed axis boundaryGap display error in some cases #174
+* (2021.11.30) Fixed serie ignore display error in some cases #173
 
 ## v2.5.0
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f4d6427b..011fd8e4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -41,6 +41,7 @@
 
 ## branch-2.0
 
+* (2021.12.03) 修复`Axis`的`boundaryGap`某些情况下显示的问题 #174
 * (2021.11.30) 修复`Serie`的`ignore`某些情况下绘制异常的问题 #173
 
 ## v2.5.0
diff --git a/Runtime/Helper/AxisHelper.cs b/Runtime/Helper/AxisHelper.cs
index 9d8426b7..fd5585a5 100644
--- a/Runtime/Helper/AxisHelper.cs
+++ b/Runtime/Helper/AxisHelper.cs
@@ -214,17 +214,21 @@ namespace XCharts
             if (splitNum == 0) return 0;
             if (axis.IsCategory())
             {
-                var data = axis.GetDataList(dataZoom);
+                var dataCount = axis.GetDataList(dataZoom).Count;
                 var scaleNum = 0;
 
                 if (axis.boundaryGap)
                 {
-                    scaleNum = data.Count % splitNum == 0 ? splitNum + 1 : splitNum + 2;
+                    scaleNum = dataCount > 2 && dataCount % splitNum == 0
+                        ? splitNum + 1
+                        : splitNum + 2;
                 }
                 else
                 {
-                    if (data.Count < splitNum) scaleNum = splitNum;
-                    else scaleNum = data.Count % splitNum == 0 ? splitNum : splitNum + 1;
+                    if (dataCount < splitNum) scaleNum = splitNum;
+                    else scaleNum = dataCount > 2 && dataCount % splitNum == 0
+                        ? splitNum
+                        : splitNum + 1;
                 }
                 return scaleNum;
             }